CN1734749A - Transferring method of thin film device, production method of active matrix substrate - Google Patents

Abstract

The present invention provides a transferring method, comprising: a substrate; a transferred layer formed on the substrate; the combination of the transferring object and the transferred layer; and removing the transferred layer from the substrate, and transferring the transferred layer to the transferring object; and transferring another using the substrate.

Description

The manufacture method of transfer method and active-matrix substrate

The application is that application number is 03157964.7, and the applying date is the dividing an application of female case application on August 30th, 2003, and the first of this mother's case is JP96-225643 in first to file, formerly August 27 1996 applying date.

Technical field

The present invention relates to be stripped from the stripping means of thing, particularly relate to peeling off and be transferred layer and transfer to transfer method on the such transfer body of transparency carrier by what the such film of functional film constituted.In addition, thin-film device, thin film integrated circuit device and the liquid crystal indicator that the present invention relates to the transfer method of thin-film device and use this method to make.

Background technology

For example when the LCD of thin-film transistor (TFT) had been used in manufacturing, process usefulness CVD method etc. formed the operation of thin-film transistor on transparency carrier.

In this thin-film transistor, the thin-film transistor of use amorphous silicon (a-Si) and the thin-film transistor of use polysilicon (p-Si) are arranged, moreover the thin-film transistor of being made by polysilicon can be categorized as through the thin-film transistor of high-temperature technology film forming and the thin-film transistor of process low temperature process film forming.

But, owing to follow processing under the higher temperature forming thin-film transistor on the transparency carrier by this way, therefore must use excellent heat resistance material, be that the high material of softening point and fusing point is as transparency carrier.Therefore, utilizing high-temperature technology to make under the situation of TFT now, using the transparent substrate that constitutes by quartz glass substrate as can be anti-fully about 1000 ℃ temperature.In addition, utilizing low temperature process to make under the situation of TFT, because about 500 ℃ temperature are high technology temperature, so the heat resistant glass of the temperature of about 500 ℃ of use abilities.

As mentioned above, the substrate that thin-film device is installed must satisfy the condition of making these thin-film devices.But if only be conceived to finish the substrate stage afterwards that thin-film device is installed, then above-mentioned sometimes " substrate " is not necessarily more satisfactory.

For example, in following the manufacturing process of high-temperature process, use quartz glass or heat resistant glass, but with common glassy phase ratio, quartz glass or heat resistant glass are rareness and the very expensive material of price, and it is difficult making large-scale transparency carrier.

In addition, quartz glass, heat resistant glass all be more crisp and crackly, and weight is heavier.This point becomes very big shortcoming under the substrate that will form the such thin-film device of TFT is installed in situation on the electronic installation.That is, resulting from the restriction of creating conditions and to the desired gap that comparatively exists between the Ideal Characteristics of goods, the conditioned disjunction characteristic that satisfy these both sides is difficulties very.

Summary of the invention

The present invention is conceived to such problem and finishes, and one of its purpose provides a kind of no matter the stripping means on the various transfer bodies can easily be peeled off, particularly be can be transferred to the characteristic, condition of being stripped from thing how.The new technology of substrate that uses when in addition, its purpose is to provide a kind of manufacturing that can freely be chosen in thin-film device independently and the substrate (having) that for example when actual use of goods, uses from seeing the substrate of comparatively desirable character aspect the purposes of goods.In addition, its purpose is to provide a kind of new technology that the luminous energy that produces on the separating layer of peeling off does not reduce, makes the characteristic of transferring to the thin-film device on the substrate not worsen that shines that can make in this shifting process.

1. at first open from making the stripping means that strippable substrate is stripped from thing or is transferred layer.These inventions as described below.

(1) stripping means of the present invention is a kind of will being present in by separating layer to be stripped from the stripping means of thing from described strippable substrate on the substrate, it is characterized in that: irradiates light is shone on the described separating layer, in the layer of described separating layer and/or make at the interface and peel off generation, the described thing of being stripped from is broken away from from described substrate.

(2) a kind of will being present in by separating layer is stripped from the stripping means of thing from described strippable substrate on the substrate of light transmission, it is characterized in that: irradiates light is shone on the described separating layer from described substrate one side, in the layer of described separating layer and/or make at the interface and peel off generation, the described thing of being stripped from is broken away from from described substrate.

(3) a kind of will being formed at by separating layer is transferred layer from described strippable substrate and transfer to another and shift method on body on the substrate, it is characterized in that: described transfer body is joined to described be transferred the layer a side opposite with described substrate after, irradiates light is shone on the described separating layer, in the layer of described separating layer and/or make at the interface and peel off generation, make the described layer that is transferred from described substrate disengaging and transfer on the described transfer body.

(4) a kind of will being formed at by separating layer is transferred layer from described strippable substrate and transfer to another and shift method on body on the substrate of light transmission, it is characterized in that: described transfer body is joined to described be transferred the layer a side opposite with described substrate after, from described substrate one side irradiates light is shone on the described separating layer, in the layer of described separating layer and/or make at the interface and peel off generation, make the described layer that is transferred from described substrate disengaging and transfer on the described transfer body.

(5) a kind of stripping means is characterized in that, comprising: the operation that forms separating layer on the substrate of light transmission; On described separating layer, directly or by the intermediate layer of stipulating form the operation that is transferred layer; Join the described operation that is transferred a side opposite of layer to shifting body with described substrate; And from described substrate one side irradiates light is shone on the described separating layer, in the layer of described separating layer and/or make at the interface and peel off generation, make the described layer that is transferred from described substrate disengaging and transfer to operation on the described transfer body.

In addition, the invention associated with above discloses following invention.

Can be included in and be transferred after layer transfers on the described transfer body, remove the operation of the described separating layer that is attached to described substrate one side and/or described transfer body one side described.

In addition, function of use film or thin-film device are as the described layer that is transferred.If particularly use thin-film transistor to be transferred layer then to be comparatively desirable as described.In addition, it is comparatively desirable described transfer body being decided to be transparency carrier.

Moreover the maximum temperature in the time will being transferred the formation of layer is when being made as Tmax, is that to constitute described transfer body be comparatively desirable for material below the Tmax with glass transition point (Tg) or softening point.Particularly using glass transition point (Tg) or softening point is that to constitute described transfer body be comparatively desirable for material below 800 ℃.

It is comparatively desirable that this external application synthetic resin or glass material constitute described transfer body.

In addition, to have thermal endurance be comparatively desirable to described substrate.Particularly the maximum temperature in the time will being transferred the formation of layer is when being made as Tmax, is that to constitute described substrate be comparatively desirable for material more than the Tmax with deformation point.

In above stripping means, by means of between the atom of the material that constitutes separating layer or intermolecular adhesion disappear or reduce and produce peeling off of described separating layer.

In addition, described irradiates light is that laser is comparatively desirable.Particularly described Wavelength of Laser is that 100～350nm is comparatively desirable.Described in addition Wavelength of Laser is that 350～1200nm is comparatively desirable.

Have, it is comparatively desirable constituting described separating layer with amorphous silicon again.It is comparatively desirable that particularly described amorphous silicon contains the above H (hydrogen) of 2at%.

In addition, useful ceramics constitutes described separating layer.Also available metal constitutes described separating layer.Also available high-molecular organic material constitutes described separating layer.At this moment, described high-molecular organic material has-CH ₂-,-CO-,-CONH-,-NH-,-COO-,-N=N-,-at least a combination among the CH=N-is comparatively desirable.Moreover described high-molecular organic material has aromatic hydrocarbon in constitutional formula be comparatively desirable.

2., the invention that is made of the separating layer in the foregoing invention a plurality of duplexers is disclosed secondly.These inventions are as described below.

At first, it is characterized in that: the duplexer by multilayer constitutes the separating layer in the invention disclosed in the preceding paragraph 1.Moreover, it is characterized in that: described separating layer comprise form or characteristic is different at least 2 layers.

It is comparatively desirable with another layer different with this light absorbing zone composition or characteristic that described separating layer comprises the light absorbing zone that absorbs described irradiates light.It is comparatively desirable that particularly described separating layer comprises light absorbing zone that absorbs described irradiates light and the light shield layer that covers described irradiates light.Moreover described light shield layer is comparatively desirable with respect to the opposite side that described light absorbing zone is positioned at the incident direction of described irradiates light.Moreover described light shield layer is that the reflector of the described irradiates light of reflection is comparatively desirable.It is comparatively desirable particularly constituting described reflector with metallic film.

3. secondly, disclose thin-film device as being stripped from thing or being transferred the transfer method of the thin-film device of body use.

A kind of thin-film device on the substrate is transferred to the method that shifts on the body, it is characterized in that comprising: the operation that on described substrate, forms separating layer; On described separating layer, form the operation that is transferred layer that comprises thin-film device; The layer that is transferred that will comprise described thin-film device by adhesive linkage joins operation on the described transfer body to; Light shine on the described separating layer, in the layer of described separating layer and/or make the operation of peeling off generation at the interface; And the operation that described substrate is broken away from from described separating layer.

According to the present invention, set in advance separating layer on the high substrate of the reliability in the device manufacturing with light absorbing characteristic, on this substrate, form thin-film devices such as TFT.Secondly, though be not particularly limited, for example thin-film device is joined on the desirable transfer body by adhesive linkage, light shine on the separating layer thereafter, in this separating layer, make thus and peel off the phenomenon generation, make the connecting airtight property reduction between this separating layer and the described substrate.Then, to the substrate reinforcing, this substrate is broken away from from thin-film device.Thus, even being shifted body, which type of also can shift the device that (formation) is desirable, reliability is high.

Have, in the present invention, by adhesive linkage thin-film device (comprise thin-film device be transferred layer) is joined to and to shift the operation on the body and to make the order of the operation that substrate breaks away from from thin-film device that it doesn't matter, which operation in front can.But, under the problematic situation of operating aspect of the thin-film device after making the substrate disengaging, wish at first thin-film device to be joined to and shift on the body, substrate is broken away from.

In addition, if use the material (for example thermosetting resin) that for example has the planarization effect as the adhesive linkage that in thin-film device being joined to the transfer body, uses, even then comprising some steps of generation on the surface that is transferred layer of thin-film device, also can make this step planarization and ignored, so always can carry out good combination, be very easily to the transfer body.Moreover it is characterized in that: described substrate is the substrate of light transmission, and described light carries out to the irradiation of the described separating layer substrate by described light transmission.For example,, but then in the high thin-film device of fabrication reliability, also can make light whole of the sub irradiation absciss layer in the lump, can improve transfer efficiency from the back side of substrate if use the transparency carrier of quartz base plate etc.

Moreover, the part of operation that discloses the transfer method of the thin-film device that will disclose in above-mentioned the 3rd has been carried out the invention of improvement.These inventions are as described below.

(1) a kind of layer that is transferred that will comprise the thin-film device on the substrate is transferred to the method that shifts on the body, it is characterized in that, comprising: the 1st operation that forms amorphous silicon layer on described substrate; On described amorphous silicon layer, form described the 2nd operation that is transferred layer that comprises described thin-film device; The described layer that is transferred that will comprise described thin-film device by adhesive linkage joins the 3rd operation on the described transfer body to; Light shine on the described amorphous silicon layer by described substrate, in the layer of described amorphous silicon layer and/or make at the interface and peel off generation, make the 4th operation of described substrate and the described adhesion reduction that is transferred layer; And the 5th operation that described substrate is broken away from from described amorphous silicon layer, the described layer that is transferred that forms in described the 2nd operation comprises thin-film transistor, and the thickness of the described amorphous silicon layer that will form in described the 1st operation forms thinlyyer than the thickness of the channel layer of the described thin-film transistor that forms in described the 2nd operation.

Here, use in the present invention amorphous silicon layer as in the 1st operation at the layer that forms on the substrate, in the 4th operation, utilize rayed to produce to peel off.This amorphous silicon layer as shown in Figure 39, thickness is thin more, just can reduce illumination more and be mapped to make on this amorphous silicon layer and peel off (being called ablation in Figure 39) and produce necessary luminous energy.

Here, the layer that is transferred that forms in the 2nd operation comprises thin-film transistor as thin-film device, and its channel layer forms with the silicon layer of polysilicon or amorphous silicon etc., generally with surpass 25nm for example the thickness of about 50nm form.The thickness as the amorphous silicon of separating layer (ablationlayer) that will form in the 1st operation in the present invention, forms thinlyyer than the channel layer that is transferred the thin-film transistor in the layer.Thereby, can be reduced in the consumed energy in the rayed operation, can seek simultaneously the miniaturization of the light supply apparatus that in this operation, uses.Moreover, because the luminous energy that shone is few, so just in case light spill from amorphous silicon layer, even this light that spills incides on the thin-film device, owing to the luminous energy that is shone is few, so also reduced the deterioration of the characteristic of thin-film device.

In addition, the thickness of this layer is defined as below the 25nm, replaces the definition of the thickness of amorphous silicon layer.As mentioned above, this amorphous silicon layer as shown in Figure 39, thickness is thin more, just can reduce illumination more and be mapped to make on this amorphous silicon layer to peel off and produce necessary luminous energy, if above-mentioned thickness then can reduce luminous energy fully.Have, it is comparatively desirable that the thickness scope of amorphous silicon layer is decided to be 5～25nm again, if it is following even more ideal to be decided to be 15nm or 11nm, can further reduces illumination like this and be mapped to make on this amorphous silicon layer to peel off and produce necessary luminous energy.

In addition, in described the 2nd operation, it is characterized in that: (LPCVD) forms above-mentioned amorphous silicon layer with the low pressure vapor growth method.If form amorphous silicon layer with LPCVD, then with plasma CVD, atmosphere (AP) CVD, ECR etc. relatively, the raising of connecting airtight property when formation comprises being transferred layer of above-mentioned thin-film device, can reduce the danger of unfavorable conditions such as producing hydrogen, take place that film is peeled off.

(2) a kind of layer that is transferred that will comprise the thin-film device on the substrate is transferred to the method that shifts on the body, it is characterized in that comprising: the operation that forms separating layer on described substrate; On described separating layer, form the operation of silicon class light absorbing zone; On described silicon class light absorbing zone, form the described operation that is transferred layer that comprises described thin-film device; The described layer that is transferred that will comprise described thin-film device by adhesive linkage joins operation on the described transfer body to; Light shine on the described separating layer by described substrate, in the layer of described separating layer and/or make the operation of peeling off generation at the interface; And the operation that described substrate is broken away from from described separating layer.

According to the present invention, even just in case light spills from separating layer, this light that spills was absorbed by silicon class light absorbing zone before inciding thin-film device.Thereby, can prevent reliably that light from inciding on the thin-film device, can prevent to result from the deterioration of characteristic of the thin-film device of light incident.And, can on the light absorbing zone of silicon class, form the layer that is transferred that comprises thin-film device.Therefore, do not have to utilize the film formation technology on silicon of in the past establishing to form thin-film device as the worry that causes metallic pollution forming when being transferred layer on having the metal level of light reflection.

Moreover, it is characterized in that: form described separating layer and described light absorbing zone with amorphous silicon, also be provided with the operation that between described separating layer and described light absorbing zone, forms the intervening layer of silicon class.As shown in Figure 39, use and absorb the light shone, the amorphous silicon layer of when this luminous energy is above as predetermined value, peeling off light absorbing zone as separating layer and silicon class.Use silicon class, for example Si oxide as the intervening layer that is used to separate this amorphous silicon layer of 2 layers.

(3) a kind of layer that is transferred that will comprise the thin-film device on the substrate is transferred to the method that shifts on the body, it is characterized in that, comprising: the 1st operation that forms separating layer on described substrate; On described separating layer, form described the 2nd operation that is transferred layer that comprises described thin-film device; The described layer that is transferred that will comprise described thin-film device by adhesive linkage joins the 3rd operation on the described transfer body to; Light shine on the described separating layer by described substrate, in the layer of described separating layer and/or make the 4th operation of peeling off generation at the interface; And the 5th operation that described substrate is broken away from from described separating layer, in described the 4th operation, in the layer of described separating layer and/or at the interface generation is when peeling off, utilize endurance interception that the upper strata of described separating layer has in the stress on the upper strata of described separating layer, prevent the distortion or the destruction on the upper strata of described separating layer.

If carry out rayed in the 4th operation, then the mode with photochemistry or heat encourages the material that constitutes separating layer, cuts off its surperficial and inner molecule or the combination of atom, and this molecule or atom are released to the outside.This phenomenon mainly be rendered as the material that constitutes separating layer all or part of produce the phenomenon of the phase change of fusion, evaporation (gasification) etc.At this moment, follow emitting of above-mentioned molecule or atom, stress is in the upper strata of separating layer.But the endurance of utilizing the upper strata of separating layer to have stops this stress, prevents the distortion or the destruction on the upper strata of separating layer.

Consider such endurance, can design the material and/or the thickness of the formation layer on the upper strata that constitutes separating layer.For example, consider that above-mentioned endurance sets the thickness of adhesive linkage, is transferred one or more in the thickness of layer, the material that shifts body and the thickness.

In addition, it is characterized in that: the operation that also has the enhancement layer that is formed for guaranteeing described endurance on any position on the upper strata that before the enforcement of described the 4th operation, is becoming described separating layer.In the present invention, only with minimal the formations layer on the upper strata that constitutes separating layer, be adhesive linkage, be transferred layer and transfer body can not guarantee above-mentioned endurance the time distortion, the destruction that can prevent thin-film device by additional enhancement layer.

(4) a kind of layer that is transferred that will comprise the described thin-film device on the described substrate is transferred to the method that shifts on the body, it is characterized in that, comprising: the 1st operation that forms separating layer on described substrate; On described separating layer, form the 2nd operation that is transferred layer that comprises thin-film device; The layer that is transferred that will comprise described thin-film device by adhesive linkage joins the 3rd operation on the described transfer body to; Light shine on the described separating layer, in the layer of described separating layer and/or make the 4th operation of peeling off generation at the interface; And the 5th operation that described substrate is broken away from from described separating layer, described the 4th operation comprises that scanning sequentially shines the light beam on the described separating layer partly, and carry out the scanning of light beam like this: feasible N (N is the integer more than 1) individual light beam irradiates district with described light beam irradiates does not overlap each other with other irradiated regions.

Particularly in the 4th operation, in order to light shine on roughly whole of separating layer, motion scan shines some light beam, the Line beam on the separating layer partly discontinuously.Have again,, can realize this beam flying, when relatively moving, can proceed rayed, or also can when mobile, stop rayed by making the substrate that forms separating layer relatively mobile with beam light source itself or this optical system.In the present invention, when the beam flying of this interruption, make adjacent light beam irradiates district not overlapping each other.

Have following worry: promptly irradiation is enough in the floor in separating layer and/or makes excessive light more than the light of peeling off generation at the interface in the mutual overlapping areas in the light beam irradiates district of each time.According to present inventor's analysis, recognize: the part of the light that this is excessive is leaked, and incides on the thin-film device by separating layer, thereby makes the characteristic of this thin-film device, and for example electrical characteristics worsen.

In the present invention, owing to so excessive illumination is not mapped on the separating layer, after thin-film device being transferred on the transfer body, also can keep the original characteristic of this thin-film device.Have again, between the light beam irradiates district of each time, only when relatively moving, become the low irradiated region of irradiates light, if or rayed is stopped then becoming and do not carry out light-struck non-irradiated region fully.Thereby, in the separating layer of this low irradiated region or non-irradiated region, do not produce and peel off, but utilize the peeling off of light beam irradiates district place of its both sides, can reduce the connecting airtight property of separating layer and substrate fully.

In addition, in order to prevent or reduce the deterioration of the characteristic of thin-film device, 2 following inventions define the beam flying of each time from the viewpoint different with the invention of above-mentioned (4).

The invention is characterized in: described the 4th operation comprises that scanning sequentially shines the light beam on the described separating layer partly, described light beam has heart district luminous intensity therein and is maximum flat peak (flat peak) district, and carry out the scanning of light beam like this: the described Ping Feng district of the light beam of N (N is the integer more than 1) the individual light beam irradiates district when making with described beam flying and each time of other irradiated regions is not overlapping each other.

Another invention is characterised in that: described the 4th operation comprises that scanning sequentially shines the light beam on the described separating layer partly, in the center of described light beam luminous intensity is maximum, carries out the scanning of light beam like this: the light beam irradiates active zone more than 90% that becomes maximum light intensity of the light beam of N (N is the integer more than 1) the individual light beam irradiates district when making with described beam flying and each time of other irradiated regions is not overlapping each other.

Therefore, by carrying out the scanning of light beam like this: make that the Ping Feng district of light beam of each time is each other not overlapping or make that the light beam irradiates active zone more than 90% that becomes maximum light intensity of light beam of each time is not overlapping each other, different with the 1st aspect of the present invention, also comprise the continuous situation of carrying out light beam irradiates for 2 times of the same area of separating layer.

But, than continuous 2 times the same area set the Ping Feng district or becomes the situation of the light beam irradiates active zone more than 90% of maximum light intensity little in total light beam irradiates amount of this same area (luminous intensity * time and).As a result, exist in after this light beam irradiates of 2 times should the zone separating layer situation about peeling off, do not become above-mentioned excessive light beam irradiates in this case.Perhaps, though for example in the 1st time light beam irradiates separating layer taken place to peel off, but can reduce the light that incides thin-film device because of the 2nd time light beam irradiates, can prevent or reduce the deterioration of the electrical characteristics of thin-film device.

In addition, use thin-film device transfer techniques of the present invention (transfer techniques of membrane structure), the thin-film device utilization that forms on substrate arbitrarily is used for the improvement of the rayed operation of peel separation layer, all can prevent or reduce the deterioration of the electrical characteristics of thin-film device.

If described thin-film device is thin-film transistor (TFT), the then improvement of the rayed operation by being used for the peel separation layer, can prevent following situation: the light that shines this TFT channel layer produces damage, causes the minimizing of conducting electric current, the increase of cut-off current, and TFT is destroyed.

Moreover, with each above invention associated, open following invention.

It is characterized in that: also comprise and remove the operation that is attached to the described separating layer on the described transfer body.This operation is fully to remove unwanted separating layer.

It is characterized in that: described transfer body is a transparency carrier.For example, can use cheapness such as soda-lime glass substrate substrate, have flexible transparent plastic film etc. as shifting body.It is characterized in that: when the maximum temperature in the time will being transferred the formation of layer is made as Tmax, be that the following material of described Tmax constitutes described transfer body with glass transition point (Tg) or softening point.

Maximum temperature in the time of so just can freely using ability device to make, at the glass substrate of out of use cheapness in the past etc.

It is characterized in that: glass transition point of described transfer body (Tg) or softening point are lower than the maximum temperature of the formation technology of described thin-film device.This is the upper limit of having stipulated glass transition point (Tg) or softening point.It is characterized in that: constitute described transfer body with synthetic resin or glass material.For example, if thin-film device is transferred to the synthetic resin board with flexibility (pliability) of plastic film etc., then can be implemented in the good character that can not obtain in the high glass substrate of rigidity.If apply the present invention to liquid crystal indicator, then can realize soft, light and the also strong display unit of anti-drop.

In addition, TFT is transferred on the synthetic resin substrate, also can constitute the thin film integrated circuit that uses single chip microcomputer that TFT constitutes etc. by using above-mentioned transfer method.

In addition, for example also can use the substrate of cheapness of soda-lime glass substrate etc. as shifting body.The soda-lime glass substrate is low, the favourable substrate economically of price.The soda-lime glass substrate exists because the heat treatment alkali of TFT when making becomes fractional melting to go out such problem, is difficult at the liquid crystal indicator that is applied to active array type in the past.But, according to the present invention, owing to shift the thin-film device of having finished, so can solve the above-mentioned heat treated problem of following.So, in the field of the liquid crystal indicator of active array type, also can use soda-lime glass substrate etc. at in-problem substrate in the past.

It is characterized in that: described substrate has thermal endurance.Thus, when the manufacturing of thin-film device, can carry out desirable high-temperature process, but the high high performance thin-film device of fabrication reliability.

It is characterized in that: described substrate is the substrate that sees through the light of the 310nm more than 10%.Thus, use the substrate to supply with the light transmission that is enough in separating layer, to make the luminous energy of peeling off generation.

It is characterized in that: when the maximum temperature in the time will being transferred the formation of layer is made as Tmax, be that the above material of described Tmax constitutes described substrate with deformation point.When the manufacturing of thin-film device, can carry out desirable high-temperature process, but the high high performance thin-film device of fabrication reliability.

It is characterized in that: constitute described separating layer with amorphous silicon.The amorphous silicon absorbing light, in addition, its manufacturing is also easy, the practicality height.

It is characterized in that: described amorphous silicon contains the above hydrogen (H) of 2 atom %.Comprise in use under the situation of amorphous silicon of hydrogen, follow the irradiation of light and emit hydrogen, press in separating layer, producing thus, have the effect of peeling off in the promotion separating layer.It is characterized in that: described amorphous silicon contains the above hydrogen (H) of 10 atom %.By increasing the containing ratio of hydrogen, promote that the effect of peeling off in the separating layer becomes more remarkable.

It is characterized in that: described separating layer is made of silicon nitride.If use silicon nitride as separating layer, then follow the irradiation of light to emit nitrogen, promote peeling off in the separating layer thus.

In addition, it is characterized in that: described separating layer is made of hydrogen-containing alloy.Thus,, then follow the irradiation of light to emit hydrogen, promote peeling off in the separating layer thus if use hydrogen-containing alloy as separating layer.

In addition, it is characterized in that: described separating layer is made of the nitrogen containing metal alloy.Thus,, then follow the irradiation of light to emit nitrogen, promote peeling off in the separating layer thus if use the nitrogen containing metal alloy as separating layer.

In addition, it is characterized in that: described separating layer is made of multilayer film.This is with regard to the clear and definite monofilm that is not limited to.It is characterized in that: this multilayer film is made of amorphous silicon film and the metal film that forms thereon.

In addition, it is characterized in that: described separating layer is made of pottery, metal, at least a of high-molecular organic material.As metal, for example can use hydrogen-containing alloy and nitrogen containing metal alloy.At this moment, identical with the situation of amorphous silicon, the hydrogen of irradiation and emitting of nitrogen by following light promote peeling off in the separating layer thus.

In addition, it is characterized in that: described only laser.Thus, laser is coherent light, is suitable for producing in the separating layer peeling off.It is characterized in that: described Wavelength of Laser is 100nm～350nm.Thus, the laser of the luminous energy by using the short wavelength can carry out peeling off in the separating layer effectively.As the laser that satisfies above-mentioned condition, excimer laser is for example arranged.Excimer laser is to have made up rare (Ar, Kr, Xe) gas and halogen gas (F by use at the gas laser of short wavelength's ultraviolet band output superlaser ₂, gas HCl) is as lasing medium, and the laser of exportable representational 4 kinds of wavelength (XeF=351nm, XeCl=308nm, KrF=248nm, ArF=193nm).Utilize the irradiation of excimer laser, can produce the direct cut-out of the molecule combination that does not have hot influence or the effects such as evaporation of gas in the separating layer on being arranged at substrate.

In addition, it is characterized in that: described Wavelength of Laser is 350nm～1200nm.For example cause in separating layer that gas is emitted, gasified, thereby the phase change of distillation etc. provides under the situation of stalling characteristic, also can use wavelength to be about the laser of 350nm～1200nm.

In addition, it is characterized in that: described thin-film device is thin-film transistor (TFT).Moreover, it is characterized in that: TFT is decided to be cmos type TFT.

Can freely high performance TFT be shifted (formation) to desirable transfer body.So, also various electronic circuits can be installed on this transfer body.That is,, can realize comprising the thin film integrated circuit device of transferring to the thin-film device on the described transfer body and constituting by using each above invention.In addition, can realize comprising the liquid crystal indicator of active-matrix substrate, the pixel section of this active-matrix substrate comprises the pixel capacitors of an end that is configured to rectangular thin-film transistor and is connected to this thin-film transistor and constitutes, and makes this active-matrix substrate by the thin-film transistor that shifts described pixel section.

Description of drawings

Fig. 1～Fig. 8 is the profile of operation of the 1st example of expression stripping means of the present invention.

Fig. 9～Figure 16 is the profile of operation of the 2nd example of expression stripping means of the present invention.

Figure 17～Figure 22 is the profile of operation of the 3rd example of the transfer method of expression thin-film component of the present invention.

Figure 23 is the figure of the transmissivity of expression the 1st substrate (substrate 100 of Figure 17) with respect to the variation of Wavelength of Laser.

Figure 24～Figure 34 is the profile of operation of the 4th example of the transfer method of expression thin-film component of the present invention.

Figure 35 (a) (b) is to use the oblique view of the microcomputer that the present invention makes.

Figure 36 is the figure that is used to illustrate the formation of liquid crystal indicator.Figure 37 is the figure of formation that is used to illustrate the major part of liquid crystal indicator.

Figure 38 is the figure of variation that is used to illustrate the transfer method of thin-film component of the present invention.

Figure 39 is the figure of the dependency relation of the light absorption energy of expression separating layer when forming separating layer with amorphous silicon, when peeling off (ablation) and thickness.

Figure 40 be illustrated in separating layer, be that the intervening layer by the silicon class has disposed figure as the variation of the amorphous silicon layer of light absorbing zone on the amorphous silicon layer.

Figure 41 is the figure that is illustrated in the variation of the silicon class light absorbing zone that has disposed the material different with separating layer on the separating layer.

Figure 42 (A)～(E) is the figure of the variation of the expression enhancement layer that disposed the distortion that is used to prevent thin-film device when the peeling off of separating layer or destruction.

Figure 43 be used to illustrate an operation of the transfer method of thin-film device of the present invention, promptly to the figure of the beam flying work of separating layer.Figure 44 is the plane graph that is used to illustrate the beam flying of Figure 42.Figure 45 be used to illustrate an operation of the transfer method of thin-film device of the present invention, promptly to the figure of another example of the beam flying work of separating layer.Figure 46 is the performance plot of the light intensity distributions of the light beam that uses in the beam flying of expression shown in Figure 45.Figure 47 is the performance plot of another light intensity distributions of the light beam that uses in the beam flying of expression shown in Figure 45.

Embodiment

Below, explain the example of stripping means of the present invention based on accompanying drawing.

(the 1st example)

Fig. 1～Fig. 8 is respectively the profile of operation of the 1st embodiment of expression stripping means of the present invention.Below based on these figure the operation of stripping means of the present invention (transfer method) is described sequentially.

[1] as shown in Figure 1, (separating layer forms face 11) goes up and forms separating layer (light absorbing zone) 2 on a face of substrate 1.Substrate 1 is to have the substrate that can see through the light transmission of this irradiates light 7 from substrate 1 one sides irradiation irradiates light 7 time, and this point is comparatively desirable.At this moment, the transmissivity of irradiates light 7 is to be comparatively desirable more than 10%, is even more ideal more than 50%.If this transmissivity is low excessively, then the decay of irradiates light 7 (loss) becomes big, owing to the peel separation layer needs big light quantity.

In addition, it is comparatively desirable constituting substrate 1 with the high material of reliability, and particularly the material formation with excellent heat resistance is comparatively desirable.Its reason be because: for example form following when being transferred layer 4 and intermediate layer 3, sometimes the event technological temperature because of its kind or formation method uprises (for example about 350～1000 ℃), even but in this case, if substrate 1 is good aspect thermal endurance, then on substrate 1 be transferred the layer 4 grade formation the time, the scope of the setting of the membrance casting condition of this temperature conditions etc. broadens.

Thereby, when the maximum temperature in the time will being transferred the formation of layer 4 is made as Tmax, be that the above material formation substrate 1 of Tmax is comparatively desirable with deformation point.Specifically, the deformation point of the constituent material of substrate 1 is being comparatively desirable more than 350 ℃, even more ideal more than 500 ℃.As such material, for example can enumerate thermal endurance glass such as quartz glass, soda-lime glass, healthy and free from worry (corning) 7059, NEC glass OA-2.

The technological temperature when reducing following separating layer 2, intermediate layer 3 and being transferred layer 4 formation has, if then also can use the glass material and the synthetic resin of low-melting cheapness for substrate 1 again.

In addition, though the thickness of substrate 1 does not limit especially, general thickness is that about 0.1～5.0mm is comparatively desirable, and thickness is that about 0.5～1.5mm is even more ideal.If the thickness of substrate 1 is thin excessively, then cause the reduction of intensity, if blocked up, then under the low situation of the transmissivity of substrate 1, be easy to generate the decay of irradiates light 7.Have, under the high situation of the transmissivity of the irradiates light 7 of substrate 1, the thickness of substrate 1 also can surpass above-mentioned higher limit again.

Have, the thickness that the separating layer of substrate 1 forms part is that so that irradiates light 7 is shone equably, this point is comparatively desirable uniformly again.In addition, it is the plane as shown like that the separating layer of the substrate 1 formation face 11 and the irradiates light plane of incidence 12 are not limited to, and also can be curved surface.In the present invention, remove substrate 1, substrate 1 is broken away from but peel off the separating layer 2 that is present in substrate 1 and is transferred between the layer 4 without etching etc., so operation is easy, simultaneously, for example use thicker substrate etc., also broaden about the scope of the selection of substrate 1.

Secondly, separating layer 2 is described.Separating layer 2 has the irradiates light 7 that absorption is narrated later, in this layer and/or at the interface 2a or 2b produce the character of peeling off (hereinafter referred to as " peeling off in the layer ", " interface peel "), comparatively it is desirable to, utilize the irradiation of irradiates light 7, between the atom of the material by constituting separating layer 2 or intermolecular adhesion disappear or reduce, be actually to produce and peel off etc., reach and peel off in the layer and/or peel off at the interface.Moreover, the irradiation that utilizes irradiates light 7 is also arranged, emit gas from separating layer 2, thereby show the situation of separating effect.That is, have following situation: the composition that contains in separating layer 2 becomes gas and the situation and separating layer 2 absorbing light of emitting become gas in a flash, and this steam is emitted, thereby helps the situation of separating.

As the composition of such separating layer 2, for example can enumerate following 1.～6..

1. amorphous silicon (a-Si):

In this amorphous silicon, can contain H (hydrogen).At this moment, the amount of H is comparatively desirable more than about 2at%, and is even more ideal at about 2～20at%.Therefore,, then utilize the irradiation of irradiates light 7, hydrogen is emitted, press in separating layer 2, taking place, press to the power of peeling off film up and down in this if contain the H of ormal weight.Can adjust the amount of the H in the amorphous silicon by suitably setting the condition of gas composition among membrance casting condition, for example CVD, gas pressure, gas atmosphere, gas flow, temperature, substrate temperature, input power etc.

2. various oxide ceramics, dielectric (strong dielectric) or the semiconductor of silica or silicate, titanium oxide or titanate, zirconia or zirconates, lanthana or lanthanite etc.:

As above-mentioned silica, can enumerate SiO, SiO ₂, Si ₃O ₂,, can enumerate for example K as silicate ₂SiO ₃, Li ₂SiO ₃, CaSiO ₃, ZrSiO ₄, Na ₂SiO ₃As above-mentioned titanium oxide, can enumerate TiO, Ti ₂O ₃, TiO ₂,, can enumerate for example BaTiO as titanate ₄, BaTiO ₃, Ba ₂Ti ₉O ₂₀, BaTi ₅O ₁₁, CaTiO ₃, SrTiO ₃, PbTiO ₃, MgTiO ₃, ZrTiO ₂, SnTiO ₄, Al ₂TiO ₅, FeTiO ₃As above-mentioned zirconia, can enumerate ZrO ₂,, for example can enumerate BaZrO as zirconates ₃, ZrSiO ₄, PbZrO ₃, MgZrO ₃, K ₂ZrO ₃

3. pottery or the dielectric (strong dielectric) of PZT, PLZT, PLLZT, PBZT etc.:

4. the nitride ceramics of silicon nitride, aluminium nitride, titanium nitride etc.:

5. high-molecular organic material:

As high-molecular organic material, be to have-CH ₂-,-CO-(ketone) ,-CONH-(amine) ,-NH-(imido) ,-COO-(ester) ,-N=N-(azo) ,-material of the combination of CH=N-(isocyanide) etc. (utilize the irradiation of irradiates light 7 cut off these in conjunction with), particularly if having the material of a plurality of these combinations, then which type of material can.In addition, high-molecular organic material can be the material that has aromatic hydrocarbon (phenyl ring more than 1 or 2 or its condensed ring) in its constitutional formula.As the concrete example of such high-molecular organic material, can enumerate the such polyolefin of polyethylene, polypropylene, polyimides, polyamide, polyester, polymethyl methacrylate (PMMA), polyphenylene sulfide (PPS), polyether sulfone (PES), epoxy resin etc.

6. metal:

As metal, for example can enumerate Al, Li, Ti, Mn, In, Sn, Y, La, Ce, Nd, Pr, Gd, Sm or comprise at least a alloy in these metals.

Secondly, the thickness of separating layer 2 is according to the difference of all conditions of the composition of peeling off purpose and separating layer 2, layer formation, formation method etc. and difference, but about usually 1nm～20 microns is comparatively desirable, and about 10nm～2 are micron then even more ideal, and about 40nm～1 micron then also wants desirable.If the thickness of separating layer 2 is too small, then the uniformity of film forming suffers damage sometimes, in peeling off, produce out-of-flatness, in addition, if thickness is blocked up,, must increase the power (light quantity) of irradiates light 7 then in order to ensure the good fissility of separating layer 2, simultaneously after remove separating layer 2 time, its operation is very time-consuming.Have, the thickness of separating layer 2 is preferably even as far as possible again.

The formation method of separating layer 2 is not particularly limited, and can carry out suitable selection according to all conditions such as film composition and thickness.For example, can enumerate the various plating methods that various gas phases such as CVD (comprising MOCVD, low pressure chemical vapor deposition, ECR-CVD), evaporation, molecular beam evaporation (MB), sputter, ion plating, PVD become embrane method, plating, immersion plating (dipping), electroless plating etc., the coating process of Langmuir-Blodgett (LB) method, spin coated, spraying plating coating (spray coat), roll coated (roll coat) etc., various print process, transfer method, ink-jet method, powder injection process etc., formation also can combine the method more than 2 kinds in these methods.At for example composition of separating layer 2 is under the situation of amorphous silicon (a-Si), and it is comparatively desirable utilizing CVD, particularly low pressure chemical vapor deposition and plasma CVD to come film forming.In addition, constitute under the situation of separating layer 2 at the pottery that produces with sol-gel process or constituting under the situation of separating layer 2 with high-molecular organic material, it is comparatively desirable utilizing coating process, particularly whirl coating to come film forming.In addition, the above operation (for example, Ceng formation operation and heat treatment step) of also available 2 operations is carried out the formation of separating layer 2.

[2] as shown in Figure 2, on separating layer 2, form intermediate layer (basalis) 3.

This intermediate layer 3 forms with various formation purposes, for example can enumerate performance as during fabrication or when using with the mode of physics or chemistry protect the following protective layer that is transferred layer 4, insulating barrier, conductive layer, irradiates light 7 light shield layer, stop to be transferred layer 4 or from least a purpose in the function in the barrier of the migration (migration) of the composition that is transferred layer 4, reflector.

As the composition in this intermediate layer 3, can form purpose according to it and suitably set, for example, under the situation that is transferred the intermediate layer that forms between the layer 4 of the separating layer 2 of amorphous silicon and thin-film transistor, can enumerate SiO ₂Deng silica, under the situation that is transferred the intermediate layer 3 that forms between the layer 4 of separating layer 2 and PZT, for example can enumerate Pt, Au, W, Ta, Mo, Al, Cr, Ti or based on the such metal of the alloy of these metals.The thickness in such intermediate layer 3 forms purpose according to it and the degree of the function that can bring into play suitably determines, but about usually 10nm～5 microns is comparatively desirable, and about 40nm～1 is micron then even more ideal.In addition, about the formation method in intermediate layer 3, also can enumerate and the identical method of in above-mentioned separating layer 2, enumerating of formation method.In addition, the above operation of also available 2 operations is carried out the formation in intermediate layer 3.

Have, the layer of also available identical or different composition more than 2 layers forms such intermediate layer 3 again.In addition, in the present invention, also can not form intermediate layer 3, directly on separating layer 2, form and be transferred layer 4.

[3] as shown in Figure 3, formation is transferred layer (being stripped from thing) 4 on intermediate layer 3.Being transferred layer 4 is layers of transferring on the transfer body of narrating below 6, and the identical method of enumerating in the available and above-mentioned separating layer 2 of formation method forms.

Formation purpose, kind, form, structure, composition, physics or the chemical characteristic etc. that are transferred layer 4 are not particularly limited, but consider the purpose and the serviceability of transfer, are that film, particularly functional film and thin-film device are comparatively desirable.As functional film or thin-film device, for example can enumerate: thin-film transistor, thin film diode, other thin-film device, electrode (example: ITO, the transparency electrode that the table top film is such), the photo-electric conversion element that uses in solar cell and the image sensor etc., switch element, memory, the actuator of piezoelectric element etc. (actuator), micro mirror (micro mirror) (piezoelectric membrane pottery), magnetic recording medium, magneto-optic recording medium, the recording medium of optical recording media etc., the magnetic recording thin film head, coil, inductor, the high magnetic-permeable material of film and with its little magnetic device that combines, filter, reflectance coating, dichronic mirror, optical thin films such as polarization element, semiconductive thin film, superconducting thin film (example: ybco film), magnetic thin film, the metallic multilayer film, the cermet plural layers, the metal semiconductor plural layers, the ceramic semiconductors plural layers, the plural layers of organic film and other materials etc.Therein, particularly be applied to the serviceability of formation, actuator (actuator), micro mirror (micro mirror) etc. of thin-film device, little magnetic device, micro three-dimensional structure thing very high, be comparatively desirable.

Such functional film or thin-film device since with the relation of its formation method, form through higher technological temperature usually.Thereby, in this case, as mentioned above,, must be the high substrate of reliability of this technological temperature of ability as substrate 1.

Have, being transferred layer 4 can be individual layer, also can be the duplexer of multilayer again.Moreover, as above-mentioned thin-film transistor etc., can be carried out regulation pattern etching be transferred layer.Be transferred formation (stacked), the pattern etching of layer 4, utilize the method corresponding to carry out with it.The layer 4 that is transferred like this forms through a plurality of operations usually.

About thin-film transistor be transferred layer 4 formation, for example can be according to the fair 2-50630 communique of spy, document: the method described in the H.Ohshima et al:International Symposium Digest of TechnicalPapers SID 1983 " with the black and white and the colored LC video display of multi-crystal TFT s addressing " be carried out.

In addition, the thickness that is transferred layer 4 is not particularly limited, and can form all conditions such as purpose, function, composition, characteristic according to it and suitably set.Being transferred layer 4 is under the situation of thin-film transistor, and it is comparatively desirable that its aggregate thickness is about 0.5～200 micron, be about 0.5～10 micron then even more ideal.In addition, under other the situation of film, the scope of preferred aggregate thickness can be wideer, for example can be decided to be 50nm～1000 micron.

Having, be transferred layer and 4 be not limited to above-mentioned such film, for example also can be the such thick film of coated film and thin slice, moreover, for example also can be powder such do not constitute being transferred thing or being stripped from thing of film (layer).

[4] as shown in Figure 4, being transferred formation adhesive linkage 5 on layer (being stripped from thing) 4, shift body 6 by this adhesive linkage 5 bonding (joint).As the preference of the bonding agent that constitutes adhesive linkage 5, can enumerate various constrictive type bonding agents such as the ray hardening type adhesive of reaction constrictive type bonding agent, thermmohardening type bonding agent, UV cured type bonding agent etc., the constrictive type bonding agent of being sick of.As the composition of bonding agent, for example can be any of epoxy series, oleic series, silicone series etc.The formation of such adhesive linkage 5, for example available coating process carries out.

State in the use under the situation of constrictive type bonding agent, for example be transferred coating constrictive type bonding agent on the layer 4, engaged thereon after the following transfer body 6, utilize the method for curing corresponding to make above-mentioned constrictive type adhesive hardens with the characteristic of constrictive type bonding agent, will be transferred layer 4 with shift body 6 bonding, be fixed up.Under the situation of using ray hardening type adhesive, be preferably in after the transfer body 6 that has disposed light transmission on the unhardened adhesive linkage 5, from shifting the light of body 6 irradiation sclerosis usefulness, make adhesive hardens.In addition,, then preferably shine the light of sclerosis usefulness, make adhesive hardens, making sclerosis become reliable from the both sides of substrate 1 and transfer body 6 if substrate 1 has light transmission.

Have again, different with diagram, also can shift body 6 one sides formation adhesive linkage 5, the bonding layer 4 that is transferred thereon.In addition, also can be transferred the layer 4 and adhesive linkage 5 between intermediate layer as described above is set.In addition, for example itself have under the situation of binding function, also can omit the formation of adhesive linkage 5 at transfer body 6.

As shifting body 6, be not particularly limited, can enumerate substrate (sheet material), particularly transparency carrier.Have, such substrate can be dull and stereotyped, also can be twisted plate again.In addition, shift body 6 and compare, we can say the relatively poor substrate of characteristic of thermal endurance, corrosion resistance etc. with aforesaid substrate 1.Its reason be because, be transferred layer 4 owing to form in substrate 1 one sides in the present invention, thereafter this is transferred layer 4 and transfers to and shift on the body 6, so to shifting the characteristic, particularly thermal endurance that body 6 requires, the temperature conditions when being transferred layer 4 and forming etc. has nothing to do.

Thereby when the maximum temperature in the time will being transferred the formation of layer 4 was made as Tmax, useable glass transition point (Tg) or softening point were that the following material of Tmax is as the constituent material that shifts body 6.For example, useable glass transition point (Tg) or softening point are that the formation of material below 800 ℃ transfer body 6 is comparatively desirable, and be even more ideal below 500 ℃, also wants desirable below 300 ℃.

In addition, as the mechanical property that shifts body 6, the rigidity (intensity) that has to a certain degree is comparatively desirable, but also can have pliability, elasticity.As the constituent material of such transfer body 6, can enumerate various synthetic resin and various glass material, particularly various synthetic resin or common (low-melting) cheap glass material are comparatively desirable.

As synthetic resin, can be any of thermoplastic resin, thermosetting resin.For example can enumerate: polyethylene, polypropylene, the ethylene-propylene copolymer body, the polyolefin of ethane-acetic acid ethyenyl copolymer (EVA) etc., cyclic polyolefin, the sex change polyolefin, polyvinyl chloride, polychlorostyrene second diene, polystyrene, polyamide, polyimides, polyamide-imide, Merlon, poly--(4-methylpentene-1), ionomer, the oleic series resin, polymethyl methacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS) copolymer (ABS resin), acrylonitrile styrene copolymer (AS resin), the butadiene-styrene copolymer body, polyformaldehyde, polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyethylene terephthalate (PET), polybutene terephthalate (PBT), the polyester of many cyclohexanes terephthalate (PCT) etc., polyethers, polyether-ketone (PEK), polyethers ether ketone (PEEK), polyimide, polyacetals (POM), polyphenylene oxide, the sex change polyphenylene oxide, polysulfones, polyphenylene sulfide (PPS), polyether sulfone (PES), polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, Kynoar, other fluorine series plastics, phenylethylene, polyolefin series, polyvinyl chloride series, polyurethane series, polyester series, polyamide series, Polybutadiene Series, anti-polyisoprene series, fluorubber series, the various thermoplastic elastomers of haloflex series etc., epoxy resin, phenol resin, carbamide resin, melamine resin, unsaturated polyester (UP), silicone resin, polyurethanes etc., or based on these copolymer, mixture, polyblends etc. can use combining more than a kind or 2 kinds in these materials (for example as the duplexer more than 2 layers).

As glass material, for example can enumerate silicate glass (quartz glass), the silicate glass that contains alkali, soda lime glass, potassium soda lime glass, lead (containing alkali) glass, barium glass, pyrex etc.Wherein, the glass except silicate glass is compared with silicate glass, and fusing point is low, in addition, and the processing that is shaped is also than being easier to, and cheap, so be comparatively desirable.

Under the situation of using the transfer body 6 that constitutes by synthetic resin, can obtain following various advantages: the transfer body 6 of molding large integratedly, even have simultaneously flexure plane or concavo-convex etc. complicated shape also can easily be made, in addition, material cost, manufacturing cost also are cheap.Thereby, can easily make large-scale and cheap device (for example, LCD).

Having, shift body 6 and can be the unit of the such independent devices of formation of liquid crystal cells for example own, also can be the unit of the part of the such formation device of chromatic filter, electrode layer, dielectric layer, insulating barrier, semiconductor element for example.Moreover, shifting body 6 can be materials such as metal, pottery, stone material, timber, paper, also can be to constitute on the face arbitrarily of certain article on the surface of works of (on the face of clock and watch, on the surface of air conditioner, printed base plate first-class) or wall, post, beam, ceiling, glass pane etc.

[5] as shown in Figure 5, the back side one side from substrate 1 makes irradiates light 7 (the irradiates light plane of incidence 12 1 sides) irradiation.After this irradiates light 7 has seen through substrate 1, shine on the separating layer 2 from interface 2a one side.Thus, shown in Fig. 6 or 7, owing to peel off and/or peel off at the interface in the generation layer in separating layer 2, adhesion reduces or disappears, so if substrate 1 and transfer body 6 are broken away from, then be transferred layer 4 and break away from from substrate 1, transfers to and shifts on the body 6.

Have, Fig. 6 is illustrated in and produces situation about peeling off in the layer in the separating layer 2 again, and Fig. 7 is illustrated in the situation that produces the interface peel at 2a place, interface in the separating layer 2.Suppose that the principle of peeling off and/or peeling off at the interface in the layer that produces in the separating layer 2 is owing to produces and peel off in the constituent material of separating layer 2, or the gas that contains of separating layer 2 to emit, have be because the just phase change of the fusion of irradiation back generation, evaporation etc.

Here, what is called is peeled off (ablation), the mode that refers to photochemistry or heat encourages the solid material (constituent material of separating layer 2) that has absorbed irradiates light, cut off the combination of its surface and inner atom or molecule and it is emitted, display mainly as the phenomenon of all or part of fusion of the constituent material that produces separating layer 2, evaporation phase change such as (gasifications).The situation that adhesion reduces in addition, is also arranged owing to above-mentioned phase change becomes small foamed state.Separating layer 2 produces in the layer to be peeled off, or the generation interface peel, or producing these two kinds peels off, and this point is decided by other various main causes of forming, reach of separating layer 2, as its one of the main reasons, can enumerate the condition of the kind, wavelength, intensity, the arrival degree of depth etc. of irradiates light 7.

As irradiates light 7, so long as in separating layer 2, cause the light of peeling off in the layer and/or peeling off at the interface, then can be any light, for example, can enumerate: X line, ultraviolet ray, visible light, infrared ray (hot line), laser, millimeter wave, microwave, electronics line, radioactive ray (α line, β line, γ line) etc., but especially consider that from (ablation) aspect of peeling off that is easy to generate separating layer 2 laser is comparatively desirable.

As the laser aid that this laser takes place, can enumerate all gases laser, Solid State Laser (semiconductor laser) etc., but can preferably use excimer laser, Nd-YAG laser, Ar laser, CO ₂Laser, CO laser, He-Ne laser etc., especially excimer laser are desirable especially.Because excimer laser is at the high energy of S-band output, so can in separating layer 2, produce in the short time at the utmost point and peel off, so peelable separating layer 2 and adjacent or near intermediate layer 3, be transferred temperature risen, promptly do not produce performance depreciation, damage.

In addition, exist under the situation of wavelength interdependence in the irradiates light when generation is peeled off in separating layer 2, the Wavelength of Laser of being shone is that about 100～350nm is comparatively desirable.

In addition, for example cause in separating layer 2 that gas is emitted, gasified, the phase change of distillation etc. and providing under the situation of stalling characteristic, the Wavelength of Laser of being shone is that about 350～1200nm is comparatively desirable.

In addition, the energy density under the situation of the energy density of the laser that is shone, particularly excimer laser is decided to be about 10～5000mJ/cm ²Be comparatively desirable, be decided to be about 100～1000mJ/cm ²Then even more ideal.In addition, it is comparatively desirable that irradiation time is decided to be about 1～1000nsec, and it is then even more ideal to be decided to be about 10～100nsec.If energy density is low or irradiation time short, then can not produce fully and peel off, in addition,, then produce harmful effect owing to see through the irradiates light in separating layer 2 and intermediate layer 3 to being transferred layer 4 sometimes if energy density height or irradiation time are long.

Be that to become with its intensity that uniform this mode shines be comparatively desirable for the irradiates light 7 of representative with such laser.The direction of illumination of irradiates light 7 is not limited to be vertical direction with respect to separating layer 2, also can be to be the direction of predetermined angular of having tilted with respect to separating layer 2.

In addition, the area of separating layer 2 than the big situation of 1 time irradiated area of irradiates light under, also can be divided into and repeatedly make the irradiates light irradiation with respect to the Zone Full of separating layer 2.In addition, also can be more than 2 times to the irradiation of same position.In addition, also can shine the irradiates light (laser) of variety classes, different wave length (wavelength range) more than 2 times to the same area or zones of different.

[6] as shown in Figure 8, for example utilize methods such as cleaning, etching, ashing (ashing), grinding or the method that these methods combine removed the separating layer 2 that is attached on the intermediate layer 3.Under the situation about peeling off in the layer of the sort of separating layer 2 shown in Figure 6, also remove the separating layer 2 that is attached on the substrate 1 in the same way.

Have again, under the situation that the such expensive material of substrate 1 usefulness quartz glass, exotic material constitute, preferably substrate 1 is utilized (recycle) once more.In other words, for the substrate 1 of planning to utilize once more, can use the present invention, serviceability is very high.

Through above each such operation, just finished the transfer that is transferred layer 4 to transfer body 6.Also can carry out and be transferred removing and other the formation etc. of layer arbitrarily of layer 4 adjacent intermediate layer 3 thereafter.

In the present invention, since be not directly peel off be stripped from thing, promptly be transferred the layer 4 itself, but in joining the separating layer 2 that is transferred layer 4 to, peel off, so no matter the characteristic, condition etc. of being stripped from thing (be transferred layer 4) are how, can be easily, reliably and equably peel off (transfer), can keep being transferred layer 4 high reliability, and do not follow strip operation for the damage of being stripped from thing (being transferred layer 4).

In addition, in illustrated embodiment, be illustrated about the transfer method that is transferred layer 4, but transfer method of the present invention also can not carry out such transfer to shifting body 6.In this case, can make and be stripped from thing and replace the above-mentioned layer 4 that is transferred.This is stripped from thing can be the material of stratiform, do not constitute any of material of layer.

In addition, being stripped from the purpose of peeling off of thing, for example can be any of the recirculation (recycle) of having removed, utilized this substrate of removing etc. etc. of attachment of the removing of unwanted part (finishing trimming), dust, oxide, heavy metal, carbon, other impurity etc. of film as described above (particularly functional film).

In addition, shift body 6 and be not limited to above-mentioned material, for example also available various metal materials, pottery, carbon, paper material, rubber etc. constitute with the diverse material of substrate 1 character (no matter whether light transmission is arranged).Be directly to form to be transferred layer 4 particularly, or be not suitable for forming under the situation of the material that is transferred layer 4 that it is very high to use value of the present invention shifting body 6.

In addition, in illustrated embodiment, irradiates light 7 is shone from substrate 1 one sides, but for example under the situation of removing attachment (being stripped from thing), and be transferred under the situation that layer 4 is not adversely affected because of the irradiation of irradiates light 7, the direction of illumination of irradiates light 7 is not limited to above-mentioned direction, also can make irradiates light from the side irradiation opposite with substrate 1.

More than, about illustrated embodiment stripping means of the present invention has been described, but the present invention is not limited to this.

For example, also can be partly, promptly with respect to the face direction of separating layer 2, irradiates light is shone with the figure of regulation, peel off or shift being transferred the such formation (the 1st method) of layer 4 with above-mentioned figure.In this case, in the operation of above-mentioned [5], with respect to the irradiates light plane of incidence 12 of substrate 1, the mask operation (masking) of carrying out corresponding to above-mentioned figure makes irradiates light 7 irradiations, or utilizes the methods such as irradiation position of critically controlling irradiates light 7 to carry out.

In addition, also can not on the separating layer of substrate 1 forms whole of face 11, to form separating layer 2, but form separating layer 2 (the 2nd method) with the figure of regulation.At this moment, can utilize mask operation etc. that separating layer 2 is formed the figure of predesignating, or after can on separating layer forms whole of face 11, forming separating layer 2, utilize etching etc. to carry out the method for pattern etching or finishing.

According to above such the 1st method and the 2nd method, be transferred the transfer of layer 4 with this pattern etching or finishing.

In addition, also can utilize the method identical to repeat transfer more than 2 times with said method.At this moment, if transfer number is an even number time, the position relation that then also can make the surperficial back side that is transferred layer that forms on last transfer body is with to have formed at first the state that is transferred layer on substrate 1 identical.

In addition, also can be (for example with large-scale transparency carrier, the effective coverage is that 900mm * 1600mm) body 6 is shifted in conduct, comparatively it is desirable to, will be (for example at small-sized substrate 1, the effective coverage be the subsection that formed on the 45mm * 40mm) sequentially repeatedly (for example be transferred layer 4 (thin-film transistor), about 800 times) transfer on the adjoining position, on the whole effective coverage of large-scale transparency carrier, form and be transferred layer 4, the final manufacturing and the measure-alike LCD of above-mentioned large-scale transparency carrier.

Secondly, the specific embodiment in the 1st example is described.

(embodiment 1)

Prepare the quartz base plate (softening point: 1630 ℃, deformation point: 1070 ℃, the transmissivity of excimer laser: roughly 100%) of vertical 50mm * horizontal 50mm * thickness 1.1mm, on a face of this quartz base plate, utilize low pressure chemical vapor deposition method (Si ₂H ₆Gas, 425 ℃) form amorphous silicon (a-Si) film as separating layer (laser absorption layer).The thickness of separating layer is 100nm.

Secondly, on separating layer, utilize ECR-CVD method (SiH ₄+ O ₂Gas, 100 ℃) formation SiO ₂Film is as the intermediate layer.The thickness in intermediate layer is 200nm.

Secondly, on the intermediate layer, utilize CVD method (Si ₂H ₆Gas) forming thickness is that the polysilicon film of 50nm is as being transferred layer.To pattern etching that this polysilicon film stipulate, become the zone of the source leakage raceway groove of thin-film transistor thereafter.With high temperature 1000 ℃ or more the surface of polysilicon film carried out thermal oxidation and formed gate insulating film SiO thereafter, ₂After, forming gate electrode (the stacked structure that forms high-melting point metal such as Mo on polysilicon) on the gate insulating film, by being that mask carries out the ion injection with the gate electrode, form source-drain area in self aligned mode, thereby form thin-film transistor.

Have again, be not to use high-temperature technology as described above, and be to use low temperature process also can form the thin-film transistor of same characteristic.For example, on separating layer, at SiO as the intermediate layer ₂Utilize low pressure chemical vapor deposition method (Si on the film ₂H ₆Gas, 425 ℃) amorphous silicon film that forms 50nm is as being transferred layer, to this amorphous silicon film irradiating laser (wavelength 308nm), makes its crystallization, becomes polysilicon film.For pattern etching that this polysilicon film stipulate, become the zone of the source leakage raceway groove of thin-film transistor thereafter.Thereafter, utilize the low pressure chemical vapor deposition method on polysilicon film deposit gate insulating film SiO ₂After, forming gate electrode (the stacked structure that forms high-melting point metal such as Mo on polysilicon) on the gate insulating film, by being that mask carries out ion and injects with the gate electrode, forming source-drain area in the mode of autoregistration (self align), thereby form thin-film transistor.

Thereafter, as required, the wiring that form the electrode be connected with source-drain area and wiring, is connected with gate electrode.In these electrodes and wiring, use Al, but be not limited to this.In addition, worrying that laser radiation because of the back operation produces under the situation of fusion of Al, also can use the metal higher (because of the laser radiation of back operation melt metal not) than the fusing point of Al.

Secondly, coating UV cured type bonding agent (thickness: 100 microns) on above-mentioned thin-film transistor, moreover on filming, this has engaged large-scale transparent glass substrate (soda-lime glass as the vertical 200mm * horizontal 300mm * thickness 1.1mm that shifts body, softening point: 740 ℃, deformation point: 511 ℃) after, from glass substrate one side irradiation ultraviolet radiation, make adhesive hardens, it is adhesively fixed.

Secondly, from quartz base plate one side irradiation Xe-Cl excimer laser (wavelength 308nm), make to produce in the separating layer and peel off (peeling off and interface peel in the layer).The energy density of the Xe-Cl excimer laser that is shone is 300mJ/cm ², irradiation time is 20nsec.Have again, the irradiation of excimer laser has the irradiation of a light beam irradiates and Line beam, under the situation of a light beam irradiates, to the unit area of regulation (for example, 8mm * 8mm) carries out an irradiation, on one side this light beam irradiates about 1/10 of unit area that respectively staggers is shone on one side.In addition, under the situation of online light beam irradiates, the unit area (for example, 378mm * 0.1mm or 378mm * 0.3mm (this is the zone more than 90% that can obtain energy)) of the regulation that respectively staggers and meanwhile identical about 1/10 shine.Thus, the each point of separating layer is subjected to 10 irradiations at least.For whole of quartz base plate, Yi Bian the irradiation area that staggers, Yi Bian implement this laser radiation.

Thereafter, separate quartz base plate and glass substrate (transfer body) in separating layer, glass substrate one side is transferred in the thin-film transistor and the intermediate layer that will form on quartz base plate.

Utilize etching, cleaning or its combination remove the lip-deep separating layer in the intermediate layer that be attached to glass substrate one side thereafter.In addition, also carry out same processing for quartz base plate, for reusing.

Have again, if becoming the glass substrate that shifts body is the substrate bigger than quartz base plate, then can repeat the such transfer from the quartz base plate to the glass substrate of present embodiment in the different in the plane zones, can form the thin-film transistor of Duoing on the glass substrate than the number of the thin-film transistor that on quartz base plate, may form.Moreover, can on glass substrate, repeat stackedly, similarly, form more a plurality of thin-film transistors.

(embodiment 2)

Except the amorphous silicon film that separating layer is made the H (hydrogen) that contains 20at%, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.Have, the condition when suitably setting the film forming of low pressure chemical vapor deposition method is carried out the adjustment of the H amount in the amorphous silicon film again.

(embodiment 3)

(form: PbTiO except separating layer being made the ceramic membrane that uses sol-gel process to form by spin coated ₃, thickness: 200nm) in addition, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 4)

(form: BaTiO except separating layer being made the ceramic membrane that forms by sputtering method ₃, thickness: 400nm) in addition, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 5)

(form: Pb (Zr, Ti) O except separating layer being made the ceramic membrane that forms by laser lift-off ₃(PZT), thickness: 50nm) in addition, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 6)

Except separating layer being made the polyimide film that forms by spin coated (thickness: 200nm), carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 7)

Except separating layer being made the polyphenylene sulfide film that forms by spin coated (thickness: 200nm), carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 8)

Except separating layer being made the Al layer that forms by sputtering method (thickness: 300nm), carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 9)

Except having used Kr-F excimer laser (wavelength:, carry out the transfer of thin-film transistor in the mode identical with embodiment 2 248nm) as the irradiates light.Have, the energy density of the laser that is shone is 250mJ/cm again ², irradiation time is 20nsec.

(embodiment 10)

Except having used Nd-YAIG laser (wavelength:, carry out the transfer of thin-film transistor in the mode identical with embodiment 2 1068nm) as the irradiates light.Have, the energy density of the laser that is shone is 400mJ/cm again ², irradiation time is 20nsec.

(embodiment 11)

Except making by the thin-film transistor of 1000 ℃ of polysilicon films that form of high-temperature technology (thickness 80nm) as being transferred the layer, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 12)

Except the transparency carrier that used Merlon (glass transition point: 130 ℃) system as shifting the body, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 13)

Except the transparency carrier that used AS resin (glass transition point: 70～90 ℃) system as shifting the body, carry out the transfer of thin-film transistor in the mode identical with embodiment 2.

(embodiment 14)

Except the transparency carrier that used polymethyl methacrylate (glass transition point: 70～90 ℃) system as shifting the body, carry out the transfer of thin-film transistor in the mode identical with embodiment 3.

(embodiment 15)

Except the transparency carrier that used polyethylene terephthalate (glass transition point: 67 ℃) system as shifting the body, carry out the transfer of thin-film transistor in the mode identical with embodiment 5.

(embodiment 16)

Except the transparency carrier that used high density polyethylene (HDPE) (glass transition point: 77～90 ℃) system as shifting the body, carry out the transfer of thin-film transistor in the mode identical with embodiment 6.

(embodiment 17)

Except the transparency carrier that used polyamide (glass transition point: 145 ℃) system as shifting the body, carry out the transfer of thin-film transistor in the mode identical with embodiment 9.

(embodiment 18)

Except the transparency carrier that used epoxy resin (glass transition point: 120 ℃) system as shifting the body, carry out the transfer of thin-film transistor in the mode identical with embodiment 10.

(embodiment 19)

Except the transparency carrier that used polymethyl methacrylate (glass transition point: 70～90 ℃) system as shifting the body, carry out the transfer of thin-film transistor in the mode identical with embodiment 11.

About above specific embodiment 1～19, the state of the thin-film transistor that with the naked eye is transferred with microscopic examination respectively, any thin-film transistor does not all have defective or out-of-flatness, shifts equably.

As mentioned above, according to stripping means of the present invention, no matter the characteristic, condition etc. of being stripped from thing (be transferred layer) are how, all can be easily and peel off reliably, particularly do not selecting to shift under the situation of body, can carry out transfer to various transfer bodies.For example, even, also can utilize to shift to form for can not directly forming film or being not suitable for the object of the formations such as material of film forming material, the material that is shaped easily, cheapness, the large-scale object that is difficult to move etc.

Particularly shift physical efficiency and use various synthetic resin and the such material more relatively poor of low-melting glass material than characteristics such as baseplate material thermal endurance, corrosion resistances.Therefore, when for example on being manufactured on transparency carrier, having formed the LCD of thin-film transistor (particularly multi-crystal TFT), quartz glass substrate by using excellent heat resistance is as substrate, use such cheap and transparency carrier material processed easily of various synthetic resin and low-melting glass material as shifting body, can easily make large-scale and cheap LCD.Such advantage is not limited to LCD, also is same for other the manufacturing of device.

In addition, owing to obtain above such advantage on one side, on one side for the high substrate of the such thermal endurance of reliability high substrate, particularly quartz glass substrate form functional film such be transferred layer, again it is carried out pattern etching, so no matter the material behavior of transfer body how, all can shift the high functional film of formation reliability on the body.

(the 2nd example)

Below explain the stripping means of the 2nd example of the present invention based on accompanying drawing.In the 2nd example separating layer 2 of the 1st example is made the stepped construction of multilayer.

Fig. 9～Figure 16 is respectively the profile of operation of the example of expression stripping means of the present invention.Below, the operation of stripping means of the present invention (transfer method) sequentially is described based on these figure.Have again, since more with the common item of the 1st example, attached for common formation with prosign, suitably omit detailed explanation.But for the part different, then supplemental instruction with the 1st example.

[1] as shown in Figure 9, go up at a face of substrate 1 (separating layer forms face 11) and form the separating layer 2 that the duplexer by multilayer constitutes.At this moment, the layer from the side that approaches substrate 1 sequentially is provided with separating layer 2 with following method.Make irradiates light 7 under the situation of substrate 1 one sides irradiation, substrate 1 preferably has the light transmission that can see through this irradiates light 7.

At this moment, the transmissivity of irradiates light 7 is identical with the 1st example.In addition, the material of substrate 1 is identical with the 1st example, and in addition, the thickness of substrate 1 is identical with the 1st example.Have, it is preferably uniform that the separating layer of substrate 1 forms thickness partly, so that irradiates light 7 is shone equably again.In addition, the separating layer of substrate 1 forms face 11 and the irradiates light plane of incidence 12 is not limited to such as shown plane, also can be curved surface.

In the present invention, owing to be not to utilize etching etc. to remove substrate 1, but peel off at substrate 1 and be transferred the separating layer 2 that exists between the layer 4, substrate 1 is broken away from, thus processing ease, but the thicker substrate of while used thickness etc., about the range of choice broad of substrate 1.

Secondly, separating layer 2 is described.Separating layer 2 has and absorbs the irradiates light 7 narrate later, in its layer and/or produce at the interface and peel off (hereinafter referred to as " peeling off in layer ", " interface peel ") such character.This separating layer 2 comprise form or characteristic is different at least 2 layers, particularly comprising the light absorbing zone 21 that absorbs irradiates light 7 is comparatively desirable with another layer different with these light absorbing zone 21 compositions or characteristic.In addition, above-mentioned another layer preferably covers the light shield layer (reflector 22) of irradiates light 7.This light shield layer is arranged in a side (upside of figure) opposite with the incident direction of irradiates light 7 with respect to light absorbing zone 21, and performance reflection or absorption irradiates light 7 stop or suppress irradiates light 7 to invade the function that is transferred layer 4 one side.

In this example, the reflector 22 that forms reflected illumination light 7 is as light shield layer.The 22 pairs of irradiates lights 7 in this reflector can be comparatively desirable with the reflection of the reflectivity more than 10%, have more than 30% then even more ideal.As such reflector 22, optical thin film that can enumerate the metallic film that constitutes by single or multiple lift, constitutes by the duplexer of the different a plurality of films of refractive index etc., but consider from reasons such as easy formation, preferably mainly constitute by metallic film.

As the formation metal of metallic film, for example can enumerate Ta, W, Mo, Cr, Ni, Co, Ti, Pt, Pd, Ag, Au, Al etc., or be the alloy of basis with at least a among these metals.As the preferred interpolation element that constitutes alloy, for example can enumerate Fe, Cu, C, Si, B.By adding these elements, may command pyroconductivity and reflectivity.In addition, forming under the situation in reflector 22, having the advantage that to make target simply in the physical vapor deposition mode.Moreover, by carrying out alloying, have also that to obtain material be to be easy to and be so cheaply advantage by simple metal.

In addition, the thickness of such reflector (light shield layer) 22 is not particularly limited, but in general about 10nm～10 microns is comparatively desirable, and about 50nm～5 are micron then even more ideal.If this thickness is blocked up, then the formation in reflector 22 is very time-consuming, and in addition, removing of the reflector 22 of carrying out afterwards is also very time-consuming.In addition, if this thickness is thin excessively, then insufficient because of the event shaded effect of film composition sometimes.

Light absorbing zone 21 is the layers that help the separation of separating layer 2, light absorbing zone 21 absorbs irradiates light 7, between the atom of the material by constituting this light absorbing zone 21 or intermolecular adhesion disappear or reduce, say so from the phenomenon aspect to produce and peel off etc., reach and peel off in the layer and/or interface peel.Moreover, the irradiation by irradiates light 7 is also arranged, gas is emitted from light absorbing zone 21, show the situation of separating effect.That is, following two kinds of situations are arranged: the composition that contains in light absorbing zone 21 becomes gas and the situation and separating layer 2 absorbing light of emitting become gas in a flash, emits this steam, helps the situation of separating.

As the composition of such formation light absorbing zone 21, can use 1.～4. identical composition that has illustrated with separating layer 2 about the 1st example.In the 2nd example, in addition can use following composition as light absorbing zone 21.

5. high-molecular organic material:

As high-molecular organic material, so long as have-CH-,-CH ₂-,-CO-(ketone) ,-CONH-(amine) ,-NH-(imido) ,-COO-(ester) ,-N=N-(azo) ,-material of the combination of CH=N-(isocyanide) etc. (utilize the irradiation of irradiates light 7 cut off these in conjunction with), particularly if having the material of a plurality of these combinations, then which type of material can.Specifically, for example can enumerate the such polyolefin of polyethylene, polypropylene, polyimides, polyamide, polyester, polymethyl methacrylate (PMMA), polyphenylene sulfide (PPS), polyether sulfone (PES), epoxy resin etc.

6. metal:

As metal, for example can enumerate Al, Li, Ti, Mn, In, Sn, reach Y, La, Ce, Nd, Pr, Sm, the such rare earth metal of Gd, or comprise at least a alloy in these metals.

7. hydrogen adsorbing alloy:

As concrete example, can enumerate LaNi ₅Inhaled the alloy of hydrogen in the hydrogen adsorbing alloy of the hydrogen adsorbing alloy of such terres rares transistion metal compound or Ti class, Ca class.

8. inhale the nitrogen alloy:

As concrete example, can enumerate the such rare earth, iron of Sm-Fe class, Nd-Co class, terres rares cobalt, terres rares nickel, and the terres rares manganese compound in inhaled the alloy of nitrogen.

Secondly, the thickness of light absorbing zone 21 is according to the difference of all conditions such as the composition of peeling off purpose and separating layer 2, layer formation, formation method and difference, but in general, and about 1nm～20 micron are comparatively desirable, about 10nm～2 are micron then even more ideal, and about 40nm～1 micron then also wants desirable.If the thickness of light absorbing zone 21 is too small, then the uniformity of film forming suffers damage sometimes, in peeling off, produce out-of-flatness, in addition, if thickness is blocked up,, must increase the power (light quantity) of irradiates light 7 then in order to ensure good fissility, simultaneously after remove separating layer 2 time, its operation is very time-consuming.Have, the thickness in light absorbing zone 21 and reflector 22 is preferably even as far as possible again.In addition, according to above-mentioned same reason, the about 2nm of the aggregate thickness of separating layer 2～50 microns is even more ideal, about 20nm～20 micron then also want desirable.

() formation method is not particularly limited each layer of formation separating layer 2 in the present embodiment, light absorbing zone 21 and reflector 22, can suitably select according to all conditions such as film composition and thickness.For example, can enumerate the various plating methods that various gas phases such as CVD (comprising MOCVD, low pressure chemical vapor deposition, ECR-CVD), evaporation, molecular beam evaporation (MB), sputter, ion plating, PVD become embrane method, plating, immersion plating (dipping), electroless plating etc., Langmuir-Blodgett (LB) method, spin coated, the coating process of spraying plating coating (spraycoat), roll coated (roll coat) etc., various print process, transfer method, ink-jet method, powder injection process etc., formation also can combine the method more than 2 kinds in these methods.Have, the formation method in light absorbing zone 21 and reflector 22 can be identical again, also can be different, suitably select according to its composition.

At for example composition of light absorbing zone 21 is under the situation of amorphous silicon (a-Si), and it is comparatively desirable utilizing CVD, particularly low pressure chemical vapor deposition and plasma CVD to come film forming.In addition, under the situation of the pottery formation light absorbing zone 21 that produces with sol-gel process and under the situation with high-molecular organic material formation light absorbing zone 21, it is comparatively desirable utilizing coating process, particularly whirl coating to come film forming.

In addition, it is comparatively desirable utilizing evaporation, molecular beam evaporation (MB), laser lift-off evaporation, sputter, ion plating, above-mentioned various plating to wait the reflector 22 that forms metallic film.

In addition, the above operation (for example, Ceng formation operation and heat treatment step) of also available 2 operations constitutes the formation of each layer of separating layer 2 respectively.

[2] as shown in figure 10, on separating layer 2, form intermediate layer (basalis) 3.

This intermediate layer 3 forms with various formation purposes, for example can enumerate performance as during fabrication or when using with the mode of physics or chemistry protect the following protective layer that is transferred layer 4, insulating barrier, conductive layer, irradiates light 7 light shield layer, stop to be transferred layer 4 or from least a purpose in the function in the barrier of the migration (migration) of the composition that is transferred layer 4, reflector.

As the composition in this intermediate layer 3, can form purpose according to it and suitably set, for example, under the situation that is transferred the intermediate layer that forms between the layer 4 of the separating layer 2 of the light absorbing zone 21 that comprises amorphous silicon and thin-film transistor, can enumerate SiO ₂Deng silica, under the situation that is transferred the intermediate layer 3 that forms between the layer 4 of separating layer 2 and PZT, for example can enumerate Pt, Au, W, Ta, Mo, Al, Cr, Ti or based on the such metal of the alloy of these metals.

The thickness in such intermediate layer 3 is identical with the 1st example.In addition, about the formation method in intermediate layer 3, also identical with the 1st example.Have, the layer of also available identical or different composition more than 2 layers forms such intermediate layer 3 again.In addition, in the present invention, also can not form intermediate layer 3, directly on separating layer 2, form and be transferred layer 4.

[3] as shown in figure 11, formation is transferred layer (being stripped from thing) 4 on intermediate layer 3.Being transferred layer 4 is layers of transferring on the transfer body of narrating below 6, and the identical method of enumerating in the available and above-mentioned separating layer 2 of formation method forms.Formation purpose, kind, form, structure, composition, physics or the chemical characteristic etc. that are transferred layer 4 are not particularly limited, but consider the purpose and the serviceability of transfer, are that film, particularly functional film or thin-film device are comparatively desirable.The example of functional film and thin-film device is identical with the 1st example.

Such functional film or thin-film device since with the relation of its formation method, form through higher technological temperature usually.Thereby, in this case, as mentioned above,, must be the high substrate of reliability of this technological temperature of ability as substrate 1.

Have, being transferred layer 4 can be individual layer, also can be the duplexer of multilayer again.Moreover, as above-mentioned thin-film transistor etc., also can be carried out regulation pattern etching be transferred layer.Be transferred formation (stacked), the pattern etching of layer 4, utilize the method corresponding to carry out with it.The layer 4 that is transferred like this forms through a plurality of operations usually.

In addition, it is also identical with the 1st example to be transferred layer 4 thickness.

[4] as shown in figure 12, being transferred formation adhesive linkage 5 on layer (being stripped from thing) 4, shift body 6 by this adhesive linkage 5 bonding (joint).As the preference of the bonding agent that constitutes adhesive linkage 5, identical with the 1st example.Under the situation of using the constrictive type bonding agent, for example be transferred coating constrictive type bonding agent on the layer 4, engaged thereon after the following transfer body 6, utilize the method for curing corresponding to make above-mentioned constrictive type adhesive hardens with the characteristic of constrictive type bonding agent, will be transferred layer 4 with shift body 6 bonding, be fixed up.Under the situation of ray hardening type adhesive, be preferably in after the transfer body 6 that has disposed light transmission on the adhesive linkage 5, carry out rayed from shifting body 6, make adhesive hardens.In addition,, then preferably carry out rayed, make adhesive hardens, making sclerosis become reliable from the both sides of substrate 1 and transfer body 6 if substrate 1 has light transmission.

Have again, different with diagram, also can shift body 6 one sides formation adhesive linkage 5, the bonding layer 4 that is transferred thereon.In addition, also can be transferred the layer 4 and adhesive linkage 5 between intermediate layer as described above is set.In addition, itself have under the situation of binding function, can omit the formation of adhesive linkage 5 at transfer body 6.

The example of transfer body 6 and material thereof and characteristic thereof are also identical with the 1st example.

[5] as shown in figure 13, make the back side one side (the irradiates light plane of incidence 12 one sides) irradiation of irradiates light 7 from substrate 1.After this irradiates light 7 has seen through substrate 1, shine on the separating layer 2 from interface 2a one side.In more detail, this irradiates light 7 shines on the light absorbing zone 21 and is absorbed, and the not part of the irradiates light 7 that is absorbed fully by light absorbing zone 21 layer 22 reflection that are reflected see through in the light absorbing zone 21 once more.Thus, owing to peel off and/or peel off at the interface in the generation layer in separating layer 2, adhesion reduces or disappears, so as shown in Figure 14 or Figure 15, if substrate 1 and transfer body 6 are broken away from, then be transferred layer 4 and break away from from substrate 1, transfers to and shifts on the body 6.

Have, Figure 14 is illustrated in and produces situation about peeling off in the layer in the separating layer 2 again, and Figure 15 is illustrated in the situation that produces the interface peel at 2a place, interface in the separating layer 2.Suppose that the principle of peeling off and/or peeling off at the interface in the layer that produces in the separating layer 2 is owing to produces and peel off in the constituent material of light absorbing zone 21, or the gas that contains of light absorbing zone 21 to emit, have be because the just phase change of the fusion of irradiation back generation, evaporation etc.

Here, what is called is peeled off (ablation), the mode that refers to photochemistry or heat encourages the solid material (constituent material of light absorbing zone 21) that has absorbed irradiates light, cut off the combination of its surface and inner atom or molecule and it is emitted, display mainly as the phenomenon of all or part of fusion of the constituent material that produces light absorbing zone 21, evaporation phase change such as (gasifications).The situation that adhesion reduces in addition, is also arranged owing to above-mentioned phase change becomes small foamed state.Separating layer 2 produces in the layer to be peeled off, or generation interface peel, or producing these two kinds peels off, this point by the layer of separating layer 2 constitute, light absorbing zone 21 form and thickness or other various main causes decide, as its one of the main reasons, can enumerate the condition of the kind, wavelength, intensity, the arrival degree of depth etc. of irradiates light 7.

The example of irradiates light 7 is identical with the 1st example with the device that this irradiates light 7 takes place.

In addition, exist under the situation of wavelength interdependence in the irradiates light when generation is peeled off in light absorbing zone 21, the Wavelength of Laser of being shone is that about 100～350nm is comparatively desirable.In addition, for example cause in separating layer 2 that gas is emitted, gasified, the phase change of distillation etc. and providing under the situation of stalling characteristic, the Wavelength of Laser of being shone is that about 350～1200nm is comparatively desirable.In addition, the energy density under the situation of the energy density of the laser that is shone, particularly excimer laser is decided to be about 10～5000mJ/cm ²Be comparatively desirable, be decided to be about 100～1000mJ/cm ²Then even more ideal.In addition, it is comparatively desirable that irradiation time is decided to be about 1～1000nsec, and it is then even more ideal to be decided to be about 10～100nsec.If energy density is low or irradiation time short, then can not produce fully and peel off, in addition,, then there is the worry of exceedingly destroying separating layer 2 if energy density height or irradiation time are long.Be that to become with its intensity that uniform this mode shines be comparatively desirable for the irradiates light 7 of representative with such laser.

The direction of illumination of irradiates light 7 is not limited to be vertical direction with respect to separating layer 2, also can be to be the direction of predetermined angular of having tilted with respect to separating layer 2.In addition, the area of separating layer 2 than the big situation of 1 time irradiated area of irradiates light under, also can be divided into and repeatedly make the irradiates light irradiation with respect to the Zone Full of separating layer 2.In addition, also can be more than 2 times to the irradiation of same position.In addition, also can shine the irradiates light (laser) of variety classes, different wave length (wavelength range) more than 2 times to the same area or zones of different.

In this example, by with the side opposite of light absorbing zone 21 with substrate 1 in abutting connection with reflector 22 is set, has following advantage: irradiates light 7 can losslessly be shone to light absorbing zone 21 (loss) effectively, simultaneously, utilize the shade function in reflector (light shield layer) 22, can prevent that irradiates light 7 from shining is transferred on layer 4 grade, can prevent to be transferred the harmful effect of rotten, the deterioration etc. of layer 4.

Particularly make irradiates light 7 losslessly mean the energy density that can reduce irradiates light 7 to light absorbing zone 21 irradiation this point effectively (loss), promptly, can more increase 1 time irradiated area, so can come certain area of peel separation layer 2, on making, be favourable with irradiation number of times still less.

[6] as shown in figure 16, for example utilize methods such as cleaning, etching, ashing (ashing), grinding or the method that these methods combine removed the separating layer 2 that is attached on the intermediate layer 3.Under the situation about peeling off in the layer of the sort of separating layer 2 shown in Figure 14, as required, also remove the light absorbing zone 21 that is attached on the substrate 1 in the same way.

Have again, under the situation that the such expensive material of substrate 1 usefulness quartz glass, exotic material constitute, preferably substrate 1 is utilized (recycle) once more.In other words, for the substrate 1 of planning to utilize once more, can use the present invention, serviceability is very high.

Through above each such operation, just finished the transfer that is transferred layer 4 to transfer body 6.Also can carry out and be transferred removing and other the formation etc. of layer arbitrarily of layer 4 adjacent intermediate layer 3 thereafter.

Have again, the layer formation of separating layer 2 is not limited to illustrated formation, for example, so long as the formation of the different a plurality of light absorbing zones of at least one condition in the stacked conditions such as film composition, thickness, characteristic, have again, except these constitute, have the formation of another such layer of above-mentioned reflector, stacked a plurality of layers formation, any can.For example, separating layer 2 can be made the structure that is used in the 3 layer laminates formation that has got involved the reflector between the 1st light absorbing zone and the 2nd light absorbing zone.

In addition, the interface that constitutes each interlayer of separating layer 2 not necessarily wants clear and definite, also can be that concentration, molecular structure, characteristic physics or chemistry of its composition of forming, stipulating near interface changes (having gradient) such structure continuously.

In addition, in illustrated embodiment, be illustrated about the transfer method that is transferred layer 4, but stripping means of the present invention also can not carry out such transfer to shifting body 6.

In addition, be stripped from the purpose of peeling off of thing, for example identical with the 1st example, can be used for various purposes.In addition, shift body 6 and be not limited to the above, identical with the 1st example, can use various materials.

In addition, in illustrated example, irradiates light 7 is shone from substrate 1 one sides, but for example under the situation of removing attachment (being stripped from thing), and be transferred under the situation that layer 4 is not adversely affected because of the irradiation of irradiates light 7, the direction of illumination of irradiates light 7 is not limited to above-mentioned direction, also can make irradiates light from the side irradiation opposite with substrate 1.In this case, light absorbing zone 21 is concerned with above-mentioned opposite with the position in reflector 22.

More than, about illustrated example stripping means of the present invention has been described, but the present invention is not limited to this.Identical with the 1st example, can carry out various distortion.The explanation of this variation please refer to the explanation in the 1st example.

Secondly, the specific embodiment in the 2nd example is described.

(embodiment 1)

Prepare the quartz base plate (softening point: 1630 ℃ of vertical 50mm * horizontal 50mm * thickness 1.1mm, deformation point: 1070 ℃, the transmissivity of excimer laser etc.: roughly 100%), on a face of this quartz base plate, formed the separating layer that 2 layer laminates by light absorbing zone and reflector constitute.

Utilize low pressure chemical vapor deposition method (Si ₂H ₆Gas, 425 ℃) form the conduct of amorphous silicon (a-Si) film as light absorbing zone.The thickness of this light absorbing zone is 120nm.In addition, on light absorbing zone, utilize sputtering method to form the Ta metallic film as the reflector.The thickness in this reflector is 100nm, is 60% for the reflectivity of following laser.

Secondly, on separating layer, utilize ECR-CVD method (SiH ₄+ O ₂Gas, 100 ℃) formation SiO ₂Film is as the intermediate layer.The thickness in intermediate layer is 200nm.

Secondly, on the intermediate layer, utilize low pressure chemical vapor deposition method (Si ₂H ₆Gas, 425 ℃) form thickness be the amorphous silicon film of 60nm as being transferred layer, to this amorphous silicon film irradiating laser (wavelength 308nm), make its crystallization, become polysilicon film.Thereafter, the pattern etching that this polysilicon film is stipulated, ion injection etc. form thin-film transistor.

Secondly, coating UV cured type bonding agent (thickness: 100 microns) on above-mentioned thin-film transistor, moreover on filming, this has engaged large-scale transparent glass substrate (soda-lime glass as the vertical 200mm * horizontal 300mm * thickness 1.1mm that shifts body, softening point: 740 ℃, deformation point: 511 ℃) after, from glass substrate one side irradiation ultraviolet radiation, make adhesive hardens, it is adhesively fixed.

Secondly, from quartz base plate one side irradiation Xe-Cl excimer laser (wavelength: 308nm), make to produce in the separating layer and peel off (peeling off and interface peel in the layer).The energy density of the Xe-Cl excimer laser that is shone is 160mJ/cm ², irradiation time is 20nsec.Have again, have in the irradiation of excimer laser a light beam irradiates and Line beam the irradiation, under the situation of a light beam irradiates, to the regulation unit area (for example, 10mm * 10mm) carries out an irradiation, on one side this light beam irradiates about 1/10 of unit area that respectively staggers is shone on one side.In addition, under the situation of online light beam irradiates, the unit area (for example, 378mm * 0.1mm or 378mm * 0.3mm (this is the zone more than 90% that can obtain energy)) of the regulation that respectively staggers and meanwhile identical about 1/10 shine.Thus, the each point of separating layer is subjected to 10 irradiations at least.For whole of quartz base plate, Yi Bian the irradiation area that staggers, Yi Bian implement this laser radiation.

, in separating layer separate quartz base plate and glass substrate (transfer body), thin-film transistor and intermediate layer are transferred to glass substrate one side thereafter.

Utilize etching, cleaning or its combination remove the lip-deep separating layer in the intermediate layer that be attached to glass substrate one side thereafter.In addition, also carry out same processing for quartz base plate, for reusing.

(embodiment 2)

Except the amorphous silicon film that light absorbing zone is made the H (hydrogen) that contains 18at%, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.Have, the condition when suitably setting the film forming of low pressure chemical vapor deposition method is carried out the adjustment of the H amount in the amorphous silicon film again.

(embodiment 3)

(form: PbTiO except light absorbing zone being made the ceramic membrane that uses sol-gel process to form by spin coated ₃, thickness: 200nm) in addition, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 4)

(form: BaTiO except light absorbing zone being made the ceramic membrane that forms by sputtering method ₃, thickness: 400nm), the reflector is made the Al metallic film that forms by sputtering method (thickness: 120nm, the reflectivity of laser: 85%) in addition, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 5)

(form: Pb (Zr, Ti) O except light absorbing zone being made the ceramic membrane that forms by laser lift-off ₃(PZT), thickness: 50nm), the reflector is made the metallic film that uses the Fe-Cr alloy that alloys target forms by sputtering method (thickness: 80nm, the reflectivity of laser: 65%) in addition, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 6)

Except light absorbing zone being made the polyimide film that forms by spin coated (thickness: 200nm), carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 7)

Except light absorbing zone being made the Pr layer (rare earth metal layer) that forms by sputtering method (thickness: 500nm), carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 8)

Except having used Kr-F excimer laser (wavelength:, carry out the transfer of thin-film transistor in the mode identical with embodiment 2 248nm) as the irradiates light.Have, the energy density of the laser that is shone is 180mJ/cm again ², irradiation time is 20nsec.

(embodiment 9)

Except having used Ar laser (wavelength:, carry out the transfer of thin-film transistor in the mode identical with embodiment 2 1024nm) as the irradiates light.Have, the energy density of the laser that is shone is 250mJ/cm again ², irradiation time is 50nsec.

(embodiment 10)

Make the thin-film transistor of the polysilicon film (thickness 90nm) that forms by high-temperature technology (1000 ℃) except being transferred layer, carry out the transfer of thin-film transistor in the mode identical with embodiment 1.

(embodiment 11)

Make the thin-film transistor of the polysilicon film (thickness 80nm) that forms by high-temperature technology (1030 ℃) except being transferred layer, carry out the transfer of thin-film transistor in the mode identical with embodiment 2.

(embodiment 12)

Make the thin-film transistor of the polysilicon film (thickness 80nm) that forms by high-temperature technology (1030 ℃) except being transferred layer, carry out the transfer of thin-film transistor in the mode identical with embodiment 4.

(embodiment 13)～(embodiment 20)

Except the above embodiments, under the condition identical, carry out the transfer of thin-film transistor with the embodiment 12～19 of the 1st example.

About embodiment 1～20, the state of the thin-film transistor that with the naked eye is transferred with microscopic examination does not all have defective at any thin-film transistor respectively, shifts equably.

As mentioned above, according to example of the present invention, can not only enjoy with the getable effect of the 1st example, and have in separating layer under the situation in light shield layer, particularly reflector, can prevent because seeing through of irradiates light produces dysgenic situation to the such layer that is transferred of thin-film transistor, in addition, owing to can utilize the reverberation that causes because of the reflector, so can more effectively carry out peeling off of separating layer.

(the 3rd example)

Below, explain the 3rd example of stripping means of the present invention based on accompanying drawing.The 3rd example is being stripped from thing or being transferred the example that layer makes thin-film device the 1st example.

Figure 17～Figure 22 is respectively the profile of operation of the example of expression stripping means of the present invention.Below, the operation of stripping means of the present invention (transfer method) sequentially is described based on these figure.Have again, more with the item that the 1st example is common, thus attached for common formation with prosign, suitably omit detailed explanation.But for the part different, then supplemental instruction with the 1st example.

[operation 1] forms separating layer (light absorbing zone) 120 as shown in figure 17 on substrate 100.Substrate 100 and separating layer 120 below are described.

1. about the explanation of substrate 100

Substrate 100 preferably has the light transmission that can see through light.At this moment, the optical transmission rate is identical with the 1st example.In addition, the material of substrate 100, thickness are also identical with the 1st example.

2. the explanation of separating layer 120

Separating layer 120 has the light that absorption is shone, in its layer and/or produce at the interface and peel off (hereinafter referred to as " peeling off in layer ", " interface peel ") such character, the preferably irradiation by light, constitute between the atom of material of separating layer 120 or intermolecular adhesion disappears or reduces, promptly produce and peel off, reach and peel off in the layer and/or peel off at the interface.

Moreover, the irradiation by light is also arranged, emit gas from separating layer 120, thereby show the situation of separating effect.That is, have following two kinds of situations: the composition that contains in separating layer 120 becomes gas and the situation and separating layer 120 absorbing light of emitting become gas in a flash, and this steam is emitted, thereby helps the situation of separating.The composition of such separating layer 120 can be enumerated the composition identical with the 1st example.

In addition, thickness of separating layer 120 and forming method thereof also can be enumerated thickness identical with the 1st example and formation method.

[operation 2]

Secondly, as shown in figure 18, on separating layer 120, form and be transferred layer (thin-film device layer) 140.The expansion profile of the K part (part that illustrates with dotted line among Figure 18) of this thin-film device layer 140 is shown on the right side of Figure 18.As shown in the figure, thin-film device layer 140 for example is included in SiO ₂The TFT (thin-film transistor) that forms on the film (intermediate layer) 142 and constituting, this TFT possess in polysilicon layer and import n type impurity and source, drop ply 146, channel layer 144, gate insulating film 148, gate electrode 150, interlayer dielectric 154 that forms and the electrode 152 that for example is made of aluminium.

In this example, use SiO ₂The intermediate layer that film is provided with as joining with separating layer 120, but also can use Si ₃N ₄Wait other dielectric films.SiO ₂The thickness of film (intermediate layer) forms purpose according to it and the degree of the function that can bring into play suitably determines, but about usually 10nm～5 microns is comparatively desirable, and about 40nm～1 is micron then even more ideal.Intermediate layer 3 forms with various purposes, for example can enumerate performance as at least a function in the function in the protective layer that is transferred layer 140 with physics or chemical mode protection, insulating barrier, conductive layer, the light shield layer of laser, the barrier that prevents migration (migration) usefulness, reflector.

Have again, according to circumstances do not form SiO ₂The intermediate layer of film etc. also can directly form on separating layer 120 and be transferred layer (thin-film device layer) 140.

Be transferred the layer that layer (thin-film device layer) 140 is included in the thin-film device of the sort of TFT shown in the right side of Figure 18 etc.As thin-film device, except TFT, can use the device identical with the 1st example.Such thin-film device (thin-film component) since with the relation of its formation method, form through higher technological temperature usually.Thereby, in this case, as mentioned above,, must be the high substrate of reliability of this technological temperature of ability as substrate 100.

[operation 3] secondly as shown in figure 19, engages (bonding) to shifting on the body 180 by adhesive linkage 160 with thin-film device layer 140.Preference as the bonding agent that constitutes adhesive linkage 160 can use the bonding agent identical with the 1st example.

Under the situation of using the constrictive type bonding agent, for example be transferred coating constrictive type bonding agent on layer (the thin-film device layer) 140, engaged thereon after the transfer body 180, utilize the method for curing corresponding to make above-mentioned constrictive type adhesive hardens with the characteristic of constrictive type bonding agent, will be transferred layer (thin-film device layer) 140 with shift body 180 bonding, be fixed up.Under the situation of ray hardening type adhesive, make an outside (or from the substrate of photopermeability and two outsides of the shifting body) irradiation of light from the transfer body of photopermeability substrate 100 or photopermeability.As bonding agent, it is comparatively desirable being difficult to the ray hardening type adhesives such as UV cured type that the thin-film device layer exerts an influence.

Have again, different with diagram, also can shift body 180 1 sides formation adhesive linkage 160, bonding layer (the thin-film device layer) 140 that be transferred thereon.In addition, for example itself have under the situation of binding function, can omit the formation of adhesive linkage 160 at transfer body 180.

As the example that shifts body 180, can use with the 1st example in the illustration identical materials.

[operation 4] secondly as shown in figure 20, makes the back side one side irradiation of light from substrate 100.At this light transmission after the substrate 100, shine on the separating layer 120.Thus, produce in the layer in separating layer 120 and peel off and/or peel off at the interface, adhesion reduces or disappears.Suppose that the principle of peeling off and/or peeling off at the interface in the layer that produces in the separating layer 120 is owing to produces and peel off in the constituent material of separating layer 120, or the gas that contains of separating layer 120 to emit, have be because the just phase change of the fusion of irradiation back generation, evaporation etc.

Here, what is called is peeled off (ablation), refer to the 1st example in the identical phenomenon of explanation.

As the light of irradiation can use with the 1st example in the identical light that uses.Wherein excimer laser is desirable especially.Because excimer laser is at the high energy of S-band output, so can in separating layer 120, produce in the short time at the utmost point and peel off, so peelable separating layer 120 and make the transfer body 180 of adjacency or substrate 100 etc. produce temperature hardly to rise, promptly do not produce performance depreciation, damage.

In addition, produce in separating layer 120 and exist when peeling off under the situation of light wavelength interdependence, the Wavelength of Laser of being shone is that about 100～350nm is comparatively desirable.

Example for the transmissivity of light wavelength of substrate shown in Figure 23 100.As shown in the figure, have with respect to the rapid characteristic that increases of the wavelength transmissivity of 300nm.In this case, the light (for example, the Xe-Cl excimer laser of wavelength 308nm) of the wavelength more than the irradiation 300nm.In addition, for example cause in separating layer 120 that gas is emitted, gasified, the phase change of distillation etc. and providing under the situation of stalling characteristic, the Wavelength of Laser of being shone is that about 350～1200nm is comparatively desirable.

In addition, the energy density under the energy density of the laser that is shone, particularly excimer laser situation is identical with the 1st example.

Have again, arrive the countermeasure that is transferred layer 140 and produces dysgenic situation, the method that forms tantalum metal films 124 such as (Ta) on separating layer (laser absorption layer) 120 is as shown in figure 38 for example arranged as the irradiates light that has seen through separating layer 120.Thus, the laser that has seen through separating layer 120 is reflected fully at the interface of metal film 124, the thin-film component that makes progress is not thus produced harmful effect.Be that to become with its intensity that uniform this mode shines be comparatively desirable for the irradiates light of representative with laser.The direction of illumination of irradiates light is not limited to be vertical direction with respect to separating layer 120, also can be to be the direction of predetermined angular of having tilted with respect to separating layer 120.

In addition, the area of separating layer 120 than the big situation of 1 time irradiated area of irradiates light under, also can be divided into and repeatedly make the irradiates light irradiation with respect to the Zone Full of separating layer 120.In addition, also can be more than 2 times to the irradiation of same position.In addition, also can make irradiates light (laser) irradiation of variety classes, different wave length (wavelength range) more than 2 times to the same area or zones of different.

Secondly, as shown in figure 21, substrate 100 is applied power, this substrate 100 is broken away from from separating layer 120.Though not shown in Figure 21, also have in this disengaging back separating layer to be attached to situation on the substrate 100.

Secondly, as shown in figure 22, for example utilize method such as cleaning, etching, ashing, grinding or the method that these methods combine is removed remaining separating layer 120.Thus, will be transferred layer (thin-film device layer) 140 transfers on the transfer body 180.Have again, under the part of separating layer is attached to situation on the substrate 100 that has broken away from, be removed in the same way.Have again, under the situation that the such expensive material of substrate 100 usefulness quartz glasss, exotic material constitute, preferably substrate 100 is utilized (recycle) once more.That is, for the substrate 100 of planning to utilize once more, can use the present invention, serviceability is very high.

Through above each such operation, just finished the transfer that is transferred layer (thin-film device layer) 140 to transfer body 180.Thereafter, also can carry out be transferred layer (thin-film device layer) 140 adjacent SiO ₂The removing of film, to the formation of conductive layer such as the wiring that is transferred layer 140 and desirable diaphragm etc.

In the present invention, owing to be not directly to peel off as what be stripped from thing to be transferred layer (thin-film device layer) 140 itself, but in joining the separating layer that is transferred layer (thin-film device layer) 140 to, peel off, so no matter the characteristic, condition of being stripped from thing (be transferred layer 140) are how, can be easily, reliably and equably peel off (transfer), can keep being transferred layer 140 high reliability, and do not follow strip operation for the damage of being stripped from thing (being transferred layer 140).

Have again, in the 3rd above example, also can under the condition of the embodiment 1～19 identical, implement with the 1st example.

(the 4th example)

This example is with the form after a part of operation distortion of the 3rd example.

[formation of the amorphous silicon layer in the operation 1]

Under the situation that consists of amorphous silicon (a-Si) of separating layer 120, vapor growth method (CVD), particularly low pressure (LP) CVD is better than plasma CVD, atmospheric pressure (AP) CVD and ECR.For example, in the amorphous silicon layer that forms with plasma CVD, contain more hydrogen.Though the existence of this hydrogen is peeled off amorphous silicon layer easily,, then emit hydrogen from this amorphous silicon layer if the substrate temperature during film forming for example surpasses 350 ℃.In the formation operation of this thin-film device, because of producing film, peels off the hydrogen of this disengaging sometimes.In addition, the connecting airtight property of plasma CVD film a little less than, exist because of the wet-cleaned operation in the device fabrication to cause substrate 100 and be transferred layer 140 worry of separating.In this respect, the LPCVD film has following advantage: do not emit the worry of hydrogen, and can guarantee connecting airtight property fully.

Secondly, the thickness about as the amorphous silicon layer 120 of separating layer describes with reference to Figure 39.The transverse axis of Figure 39 is represented the thickness of amorphous silicon layer, and the longitudinal axis is represented the luminous energy with this layer absorption.As mentioned above, if amorphous silicon layer is carried out rayed, then produce and peel off.

Here, what is called is peeled off (ablation), the mode that refers to photochemistry or heat encourages the immobilization material (constituent material of separating layer 120) that has absorbed irradiates light, cut off the combination of its surface and inner atom or molecule and it is emitted, display mainly as the phenomenon of all or part of fusion of the constituent material that produces separating layer 120, evaporation phase change such as (gasifications).The situation that adhesion reduces in addition, is also arranged owing to above-mentioned phase change becomes small foamed state.

And as can be seen from Figure 39, thickness is thin more, and reaching this, to peel off necessary absorption energy low more.

By the above, in the present embodiment, will be as the thickness attenuate of the amorphous silicon layer 120 of separating layer.Thus, the energy of the light on the amorphous silicon layer 120 can be reduced to shine, when saving energy, the miniaturization of light supply apparatus can be sought.

Secondly, investigation is as the numerical value of the thickness of the amorphous silicon layer 120 of separating layer.As can be seen from Figure 39, the thickness of amorphous silicon is thin more, and reaching this, to peel off necessary absorption energy low more, and according to present inventor's investigation, thickness is comparatively desirable below 25nm, utilizes the power of general light supply apparatus can be enough to produce and peels off.Lower limit about thickness is not done special restriction, is comparatively desirable but it down is defined as 5nm, and this is from carrying out the formation of amorphous silicon layer reliably and can guaranteeing that the viewpoint of stipulating of connecting airtight power determines.Thereby, be 5～25nm as the comparatively desirable scope of the thickness of the amorphous silicon layer 120 of separating layer.Even more ideal thickness is below the 15nm, can realize further energy-efficient and guarantee to connect airtight power.Best thickness scope is that 11nm is following and in its vicinity, can reduce significantly and peel off required absorption energy.

(the 5th example)

This example is with the form after a part of operation distortion of the 3rd or the 4th example.

[enhancing of the transfer body in the operation 3]

In addition, as the mechanical property that shifts body 180, the rigidity (intensity) that has to a certain degree is comparatively desirable, but also can have pliability, elasticity.Shift the mechanical property of body 180 and will consider following aspect especially.If this separating layer 120 is carried out rayed, then the mode with photochemistry or heat encourages the material that constitutes separating layer 120, cuts off the combination of its surface and inner molecule or atom and makes this molecule or atom be released to the outside.Preferably guarantee its endurance, so that can be with shifting that body 180 hinders that shelves are followed this molecule or emitting of atom and the stress that acts on the upper strata of separating layer 120 by the mechanical strength that shifts body 180.Thus, can prevent the distortion or the destruction on the upper strata of separating layer 120.

Only be not limited to guarantee such endurance with the mechanical strength that shifts body 180, also can be by being positioned at layer on the separating layer 120, promptly being transferred layer 140, adhesive linkage 160 and shift arbitrary layer of body 180 or a plurality of layers mechanical strength is guaranteed such endurance.In order to ensure such endurance, material and the thickness that can suitably select to be transferred layer 140, adhesive linkage 160 and shift body 180.

With being transferred layer 140, adhesive linkage 160 and shifting body 180 and can not guarantee under the situation of above-mentioned endurance, shown in Figure 42 (A)～(E), also can on any position on the upper strata that becomes separating layer 120, form enhancement layer 132 only.

Enhancement layer 132 shown in Figure 42 (A) is arranged on separating layer 120 and is transferred between the layer 140.If do like this, then after peeling off with separating layer 120 generations and substrate 100 is broken away from, can remove remaining separating layer 120 and enhancement layer 132 from being transferred layer 140.Shown in Figure 42 (B), after peeling off, also can remove the enhancement layer 132 that is arranged on the upper strata of shifting body 180 at least from shifting body 180 with separating layer 120 generations.Enhancement layer 132 shown in Figure 42 (C) for example is clipped in as insulating barrier and constitutes in a plurality of layers that are transferred layer 140.Each enhancement layer 132 of Figure 42 (D), (E) is configured in the lower floor or the upper strata of adhesive linkage 140.In this case, can not remove afterwards.

(the 6th example)

This example is with the form after a part of operation distortion of the 3rd, the 4th or the 5th example.

[forming the light absorbing zone of silicon class in the separating layer in the operation 4]

Preferably adopt the instead method among Figure 38 of the method shown in Figure 40, Figure 41.Figure 40 has been to use the example as the amorphous silicon layer 120 of separating layer, also is provided with the amorphous silicon layer 126 that uses as silicon class light absorbing zone in the lower floor that is transferred layer 140.In order to separate this 2 amorphous silicon layers 120,126, for example sandwich silicon oxide film (SiO ₂) as silicon class intervening layer.If do like this, just in case irradiates light sees through the amorphous silicon layer 120 as separating layer, this absorbs through the amorphous silicon layer 126 that light also is used as silicon class light absorbing zone.As a result, the thin-film device on it is not produced harmful effect.And because additional 2 layer 126,120 all is the layer of silicon class, so as film formation technology is in the past established, can not cause metallic pollution etc.

Have again,, then can prevent from reliably in amorphous silicon layer 126, to produce to peel off if will do to such an extent that liken to as the thickness of the amorphous silicon layer 126 of light absorbing zone to the thickness of the amorphous silicon layer 120 of separating layer is thick.But, be not limited to above-mentioned thickness relation, because the luminous energy that incides amorphous silicon layer 126 lacks much than being directly incident on luminous energy as the amorphous silicon layer 120 of separating layer, peel off so can prevent from amorphous silicon layer 126, to produce.

Have again, as shown in figure 41, show the example of the silicon class light absorbing zone 130 that is provided with the material different, not necessarily need to be provided with the intervening layer 128 of silicon class in this case with separating layer 120.

Constituting as Figure 40, Figure 41, the light of carrying out in the separating layer 120 leaks under the situation of countermeasure, has following advantage: it is bigger promptly to be used in the light absorption energy that generation is peeled off in separating layer 120, also can prevent the harmful effect to thin-film device reliably.

(the 7th example)

This example is with the form after a part of operation distortion of the 3rd, the 4th, the 5th or the 6th example.

[the light-struck distortion in the operation 4]

The light illuminating method of present embodiment is the particularly preferred light illuminating method under the situation of the metal film 124 that does not have Figure 38, and thin-film device is not produced harmful effect, with reference to the later figure of Figure 43, this method is described.

Figure 43 and Figure 44 show Line beam are sequentially scanned along scanning direction A, and the roughly whole face of separating layer 120 is carried out light-struck method.In each figure, implement the beam flying of each time like this: promptly when representing with N to make Line beam 10 carry out the number of times of beam flying, make the N time the irradiated region 20 (N) of Line beam 10 not overlapping with the irradiated region 20 (N+1) of the N+1 time Line beam 10.Therefore, between adjacent irradiated region 20 (N) and 20 (N+1), form than the irradiated region of each time narrow a lot of low irradiated region or non-irradiated region 30.

Here, when on illustrated A direction Line beam 10 being moved with respect to substrate 100, if go back outgoing beam when mobile, the zone of then symbol 30 is low irradiated region.On the other hand, if do not penetrate Line beam 10 when mobile, the zone of then symbol 30 is non-irradiated region.

Different with Figure 43,44 mode, if make the light beam irradiates district of each time overlapping each other, then just irradiation in the layer of separating layer 120 and/or at the interface is enough to produce excessive light more than the light of peeling off.Incide by separating layer 120 if the part of the light that this is excessive take place to be leaked and to comprise being transferred on the layer 140 of thin-film device, then become the characteristic of this thin-film device, the reason that for example electrical characteristics worsen.

In Figure 43,44 mode, because so excessive light do not shine on the separating layer 120, so after thin-film device being transferred on the transfer body, also can keep the original characteristic of this thin-film device.Peeling off in the light beam irradiates district of its both sides have, do not peel off, owing to can make the separating layer 120 and the connecting airtight property of substrate 100 reduce fully though in separating layer 120, do not produce corresponding to low irradiated region or non-irradiated region 30.

Secondly, the example about the beam flying of the light intensity distributions of having considered Line beam 10 describes with reference to Figure 45～Figure 47.

Figure 45 is different with Figure 43, implements the beam flying of each time like this: make the N time the irradiated region 20 (N) of Line beam 10 overlapping with the irradiated region 20 (N+1) of the N+1 time Line beam 10.Therefore, in adjacent irradiated region 20 (N) and 20 (N+1), form after-sun district 40.

Even formed such after-sun district 40, can not result from above-mentioned excessive rayed yet and in separating layer 120, produce light and leak, can keep the original characteristic of thin-film device thus, its reason is as described below.

Figure 46 and Figure 47 show the light intensity distributions that exists with ... the position because of adjacent 2 Line beams 10,10 of beam flying.

According to the light intensity distributions characteristic shown in Figure 46, each Line beam 10 has in the zone of the Rack that comprises this beam center luminous intensity becomes maximum flat peak (flat peak) 10a.And, carry out beam flying like this: make because of adjacent 2 Line beams 10, the 10 flat peak 10a separately of beam flying not overlapping.

On the other hand, according to the light intensity distributions characteristic shown in Figure 47, each Line beam 10 is maximum in the beam center luminous intensity, and along with leaving beam center, luminous intensity descends.And, carry out beam flying like this: make because of the light beam irradiates active zone more than 90% that becomes maximum light intensity of adjacent 2 Line beams 10,10 of beam flying not overlapping each other.

As a result, total light beam irradiates amount in after-sun district 40 (luminous intensity * time of each position and) than in continuous 2 the setting Ping Feng districts of the same area or the situation that becomes the light beam irradiates active zone more than 90% of maximum light intensity lack.Thus, exist in the situation that this regional separating layer is just peeled off that begins of these 2 light beam irradiates in after-sun district 40, this situation does not become above-mentioned excessive light beam irradiates.Perhaps, even for example separating layer is just peeled off in the 1st time light beam irradiates, also can reduce result from the 2nd time light beam irradiates and incide light on the thin-film device, can prevent the deterioration of the electrical characteristics of thin-film device, perhaps can be reduced to the degree that does not have problems in actual use.

Leak in order to be suppressed at 2 light in the irradiated region 40, can will shine the maximum of luminous intensity of each time of 2 irradiated regions 40 to be decided to be less than 90% with respect to light-struck maximum light intensity (luminous intensity of peak center) of each time be comparatively desirable, be decided to be 80% with next even more ideal, be decided to be 50% with the next ideal of also wanting.If particularly the absolute value of peak intensity is bigger,, remove then that also it doesn't matter above the half width (50%) of the luminous intensity at peak overlapping even under the intensity of the half width (50%) of the luminous intensity at peak, also can peel off.

Have, the above is not limited to Line beam 10 again, also is same about the light beam of other shapes such as a light beam.Under the situation of a light beam, should consider with up and down, about other the relation in light beam irradiates district of adjacency.

Have again, if be that the irradiates light of representative becomes substantially uniform this mode with its intensity and shines with laser, then the direction of illumination of irradiates light is not limited to be vertical direction with respect to separating layer 120, also can be to be the direction of predetermined angular of having tilted with respect to separating layer 120.

Secondly, describe about specific embodiment of the present invention.Implement this above-mentioned example under the laser radiation of this embodiment in the embodiment 1 of the 3rd example.

(variant embodiment 1)

Prepare the quartz base plate (softening point: 1630 ℃, deformation point: 1070 ℃, the transmissivity of excimer laser: roughly 100%) of vertical 50mm * horizontal 50mm * thickness 1.1mm, on a face of this quartz base plate, utilize low pressure chemical vapor deposition method (Si ₂H ₆Gas, 425 ℃) form amorphous silicon (a-Si) film as separating layer (laser absorption layer).The thickness of separating layer is 100nm.

Secondly, on separating layer, utilize ECR-CVD method (SiH ₄+ O ₂Gas, 100 ℃) formation SiO ₂Film is as the intermediate layer.The thickness in intermediate layer is 200nm.

Secondly, on the intermediate layer, utilize CVD method (Si ₂H ₆Gas) forming thickness is that the polysilicon film of 50nm is as being transferred layer.Thereafter, the pattern etching to this polysilicon film is stipulated forms the zone of leaking raceway groove as the source of thin-film transistor.With high temperature 1000 ℃ or more the surface of polysilicon film carried out thermal oxidation and formed gate insulating film SiO thereafter, ₂After, forming gate electrode (the stacked structure that forms high-melting point metal such as Mo on polysilicon) on the gate insulating film, by being that mask carries out ion and injects with the gate electrode, forming source-drain area in the mode of autoregistration (self align), thereby form thin-film transistor.

Have again, be not to use high-temperature technology as described above, and be to use low temperature process also can form the thin-film transistor of same characteristic.For example, on separating layer, at SiO as the intermediate layer ₂Utilize low pressure chemical vapor deposition method (Si on the film ₂H ₆Gas, 425 ℃) form thickness be the amorphous silicon film of 50nm as being transferred layer, to this amorphous silicon film irradiating laser (wavelength 308nm), make its crystallization, become polysilicon film.Thereafter, the pattern etching for this polysilicon film is stipulated forms the zone of leaking raceway groove as the source of thin-film transistor.Thereafter, utilize the low pressure chemical vapor deposition method on polysilicon film deposit gate insulating film SiO ₂After, forming gate electrode (the stacked structure that forms high-melting point metal such as Mo on polysilicon) on the gate insulating film, by being that mask carries out ion and injects with the gate electrode, forming source-drain area in the mode of autoregistration (self align), thereby form thin-film transistor.

Thereafter, as required, the wiring that form the electrode be connected with source-drain area and wiring, is connected with gate electrode.In these electrodes and wiring, use Al, but be not limited to this.In addition, worrying that laser radiation because of the back operation produces under the situation of fusion of Al, also can use the metal higher (because of the laser radiation of back operation melt metal not) than the fusing point of Al.

Secondly, coating UV cured type bonding agent (thickness: 100 microns) on above-mentioned thin-film transistor, moreover on filming, this has engaged large-scale transparent glass substrate (soda-lime glass as the vertical 200mm * horizontal 300mm * thickness 1.1mm that shifts body, softening point: 740 ℃, deformation point: 511 ℃) after, from glass substrate one side irradiation ultraviolet radiation, make adhesive hardens, it is adhesively fixed.

Secondly, (wavelength: 308nm), the beam flying by shown in carrying out after Figure 43 makes to produce in the separating layer and peels off (peeling off and interface peel in the layer) from quartz base plate one side irradiation Xe-Cl excimer laser.The energy density of the Xe-Cl excimer laser that is shone is 250mJ/cm ², irradiation time is 20nsec.Have again, the irradiation of excimer laser has a light beam irradiates and Line beam irradiation, under the situation of a light beam irradiates, to the regulation unit area (for example, 8mm * 8mm) carries out an irradiation, carry out beam flying as shown in figure 43 like that on one side, make that the irradiated region of each time is not overlapping (not overlapping all around), Yi Bian shine.In addition, under the situation of online light beam irradiates, with the same manner as shown in figure 43 the unit area (for example, 378mm * 0.1mm and 378mm * 0.3mm (this be the zone 90% or more that can obtain energy)) of regulation carried out beam flying on one side shine on one side.Also can replace and carry out beam flying as shown in figure 45 like that, make that the beam intensity in the zone of irradiation reduces overlappingly.

Thereafter, peel off quartz base plate and glass substrate (transfer body) in separating layer, glass substrate one side is transferred in the thin-film transistor and the intermediate layer that will form on quartz base plate.Utilize etching, cleaning or its combination remove the lip-deep separating layer in the intermediate layer that be attached to glass substrate one side thereafter.In addition, also carry out same processing for quartz base plate, for reusing.

Have again, if as the glass substrate that shifts body is the substrate bigger than quartz base plate, then can repeat the such transfer from the quartz base plate to the glass substrate of present embodiment in the different in the plane zones, can form the thin-film transistor of Duoing on the glass substrate than the number of the thin-film transistor that on quartz base plate, may form.Moreover, can on glass substrate, repeat stackedly, similarly form more a plurality of thin-film transistors.

(the 8th example)

Below explain the 8th example of stripping means of the present invention based on accompanying drawing.This example is stripped from thing or is transferred the TFT that layer makes the CMOS structure any example of the 1st to the 7th.

Figure 24～Figure 34 is respectively the profile of operation that the example of stripping means of the present invention is shown.

[operation 1] as shown in figure 24, sequentially stacked formation separating layer on substrate (for example quartz base plate) 100 (for example amorphous silicon layer that forms with the LPCVD method) 120, intermediate layer (SiO for example ₂Film) 142, amorphous silicon layer (for example forming) 143 with the LPCVD method, then, laser is shone on whole of amorphous silicon layer 143 from the top, anneal.Thus amorphous silicon layer 143 is recrystallized, become polysilicon layer.

[operation 2] then as shown in figure 25, carries out pattern etching to the polysilicon layer that obtains with laser annealing, forms island 144a, 144b.

[operation 3] for example utilizes the CVD method to form gate insulating film 148a, the 148b that covers island 144a, 144b as shown in figure 26.

[operation 4] forms the gate electrode 150a, the 150b that are made of polysilicon or metal etc. as shown in figure 27.

[operation 5] forms the mask layer 170 that is made of polyimides etc. as shown in figure 28, and as mask, for example being undertaken by autoregistration, the ion of boron (B) injects with gate electrode 150b and mask layer 170.Form p thus ⁺ Layer 172a, 172b.

[operation 6] forms the mask layer 174 that is made of polyimides etc. as shown in figure 29, and as mask, for example being undertaken by autoregistration, the ion of phosphorus (P) injects with gate electrode 150a and mask layer 174.Form n thus ⁺ Layer 146a, 146b.

[operation 7] forming interlayer dielectric 154, forms after the contact hole as shown in figure 30 selectively, forms electrode 152a～152d.

The TFT of the CMOS structure of Xing Chenging is equivalent to layer (the thin-film device layer) 140 that be transferred among Figure 18～Figure 22 by this way.Have again, also can on interlayer dielectric 154, form diaphragm.

[operation 8] forms the epoxy resin layer 160 as adhesive linkage as shown in figure 31 on the TFT of CMOS structure, secondly, by this epoxy resin layer 160 TFT is bonded on the transfer body (for example, soda-lime glass substrate) 180.Then, heating makes epoxy cure, and bonding (joint) shifts body 180 and TFT.

Have, adhesive linkage 160 also can be UV cured type bonding agent, be photopolymer resin again.In this case, not by heating but make the polymer sclerosis from shifting body 180 1 side irradiation ultraviolet radiations.

[operation 9] shown in figure 32, from the back side illuminaton of substrate 100 Xe-Cl excimer laser for example.Thus separating layer 120 the layer in and/or at the interface the generation peel off.

[operation 10] peels off substrate 100 as shown in figure 33.

[operation 11] is last, utilizes etching to remove separating layer 120.Thus, as shown in figure 34, the TFT of CMOS structure transferred to shift on the body 180.

(the 9th example)

If use the transfer techniques of the thin-film device that has illustrated in any example of the above-mentioned the 1st and even the 8th, then the microcomputer that use thin-film component such shown in for example Figure 35 (a) constitutes can be formed on desirable substrate.In Figure 35 (a), CPU300, RAM320, the imput output circuit 360 that uses the thin-film component forming circuit has been installed on the flexible base, board 182 of formations such as plastics and has been used to supply with the solar cell 340 of the PIN knot that possesses amorphous silicon of the supply voltage of these circuit.Because the microcomputer of Figure 35 (a) forms on flexible base, board, so shown in Figure 35 (b), have strong and because the feature in light weight so that anti-dropping capability is strong of counter-bending ability.

(the 10th example)

Use the transfer techniques of the thin-film device of any example of the above-mentioned the 1st and even the 4th, the liquid crystal indicator of active array type of active-matrix substrate that can be made into use as shown in Figure 36, Figure 37.

As shown in figure 36, the liquid crystal indicator of active array type possesses lighting source 400, Polarizer 420, active-matrix substrate 440, liquid crystal 460, counter substrate 480 and the Polarizer 500 of back of the body irradiation etc.

Have again, using under the such situation of flexible base, board of plastic film as active-matrix substrate 440 of the present invention and counter substrate 480, make the structure of the reflective liquid crystal screen that has adopted reflecting plate if replace lighting source 400, then can realize having pliability, shock resistance is strong and lightweight active array type liquid crystal display screen.Have again,, do not need reflecting plate and Polarizer 420 forming under the situation of pixel capacitors with metal.

The active-matrix substrate 440 that uses in this example has disposed TFT in pixel section 442, moreover this active-matrix substrate 440 is active-matrix substrates that the driver internally-arranged type of drive circuit (scan line driver and datawire driver) 444 has been installed.

The circuit structure of the major part of the liquid crystal indicator of this active array type shown in Figure 37.As shown in figure 37, pixel section 442 comprise that its grid is connected to that grid line, source-drain electrode one is connected to data wire D1, source-drain electrode another be connected to the TFT (M1) and the liquid crystal of liquid crystal 460.In addition, drive portion 444 comprises the TFT (M2) that utilizes the technology identical with pixel section TFT (M1) and form and constitutes.

By the transfer method that has illustrated with the 3rd and the 4th above-mentioned example, can form the active-matrix substrate 440 that has comprised TFT (M1) and TFT (M2).

(possibility of utilizing on the industry)

As discussed above, because various be stripped from of the present invention by forming at substrate Thing (being transferred thing) is transferred on the transfer body different from the substrate that is used to form, can be basic with manufacturing The above-mentioned thing of being stripped from of configuration on the different transfer body of plate is so not only can be applicable to liquid crystal indicator, half The conductor integrated circuit also can be applicable in the manufacturing of various devices.

Claims (20)

1. the manufacture method of an active-matrix substrate comprises:

On substrate, form separating layer;

On aforesaid substrate, form the layer that is transferred that includes a plurality of thin-film transistors;

To be transferred layer and remove, and the above-mentioned layer that is transferred will be transferred to the transfer body from aforesaid substrate;

Re-using aforesaid substrate shifts in another.

2. the manufacture method of active-matrix substrate as claimed in claim 1 is characterized in that:

Above-mentioned active-matrix substrate comprises pixel parts and driver portion, and wherein at least one part has transistor.

3. transfer method comprises:

Substrate is provided;

On aforesaid substrate, form separating layer;

On above-mentioned separating layer, form and be transferred layer; With

Above-mentioned separating layer is partly cut, so that the above-mentioned part of layer that is transferred is with given figure transfer to a transfer body.

4. transfer method as claimed in claim 3 is characterized in that:

At least produce one of in separating layer, and on the interface between separating layer and the aforesaid substrate and peel off, remove from aforesaid substrate thereby will be transferred layer.

5. transfer method as claimed in claim 4 is characterized in that:

Partly shining above-mentioned separating layer with light peels off with generation.

6. transfer method as claimed in claim 5 is characterized in that:

Wherein light shines by mask.

7. transfer method as claimed in claim 5 is characterized in that:

Wherein light-struck position Be Controlled.

8. transfer method as claimed in claim 3 is characterized in that:

Above-mentioned separating layer repeatedly is transferred to above-mentioned transfer body.

9. transfer method as claimed in claim 8 is characterized in that:

Above-mentioned transfer body is greater than aforesaid substrate.

10. transfer method as claimed in claim 8 is characterized in that:

In the repetition period, above-mentioned be transferred the layer be transferred into the limit against the limit.

11. transfer method as claimed in claim 3 is characterized in that:

Also be included in the above-mentioned layer that is transferred and go up the step that forms adhesive phase, above-mentioned adhesive phase is attached to above-mentioned transfer body with the above-mentioned layer that is transferred.

12. transfer method as claimed in claim 11 is characterized in that:

Above-mentioned adhesive phase has selected a kind of adhesive from the group that comprises hardenable binder, reactive curing adhesive, photo-hardening adhesive, heat curing adhesive, ultraviolet light photopolymerization adhesive and anaerobic adhesive.

13. transfer method as claimed in claim 12 is characterized in that:

Aforesaid substrate has light transmission, and illuminated so that the adhesive sclerosis from the aforesaid substrate side.

14. transfer method as claimed in claim 12 is characterized in that:

Above-mentioned transfer body has light transmission, and illuminated so that the adhesive sclerosis from above-mentioned transfer body.

15. transfer method as claimed in claim 3 is characterized in that:

Above-mentioned be transferred the layer comprise at least have thin-film transistor and thin film diode thin-film semiconductor device, electrode, photoelectric device, actuator, little magnetic device, optical thin film, superconducting thin film and plural layers one of them.

16. the manufacture method of an active-matrix substrate comprises:

Substrate is provided;

On aforesaid substrate, form separating layer;

In above-mentioned separation, form the layer that is transferred that includes a plurality of thin-film transistors;

Above-mentioned separating layer is partly cut,, and repeatedly carry out so that an above-mentioned part that is transferred layer shifts body with given figure transfer to.

17. the manufacture method of active-matrix substrate as claimed in claim 16 is characterized in that:

Above-mentioned transfer body is greater than aforesaid substrate.

18. the manufacture method of active-matrix substrate as claimed in claim 16 is characterized in that:

Above-mentioned active-matrix substrate comprises pixel parts and driver portion, and one of them part has transistor.

19. the manufacture method of an active-matrix substrate comprises:

On substrate, form separating layer;

On aforesaid substrate, form the layer that is transferred that includes a plurality of thin-film transistors;

Make and shift body and layer combine, will above-mentionedly be transferred and layer remove, and above-mentioned being transferred layer transferred to above-mentioned transfer body from aforesaid substrate with above-mentioned being transferred; These steps constitute transfer process, and above-mentioned transfer process is heavily carried out with covering.

20. the manufacture method of active-matrix substrate as claimed in claim 19 is characterized in that:

Above-mentioned active-matrix substrate comprises pixel parts and driver portion, and wherein at least one part has transistor.

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