KR20170058182A - Light Sintering Apparatus Having Inclined Feeding Part for Fume Removal - Google Patents

Abstract

The present invention relates to a light sintering apparatus having an inclined conveying part for removing smoke. The light sintering apparatus comprises: a light output part irradiating light on a substrate on which electroconductive ink is printed, and sintering the electroconductive ink printed on the substrate; and a substrate conveying part provided on a lower part of the light output part to convey the substrate to a position corresponding to the light emitting part, and provided to be inclined at a predetermined angle so that smoke generated when sintering the electroconductive ink printed on the substrate does not block or suppress an irradiation path of light irradiated from the light output part.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a light sintering apparatus having a slant conveyance portion for removing smoke,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light sintering apparatus having an inclined transfer unit for removing smoke, and more particularly, to a light sintering apparatus having an inclined transfer unit for removing smoke, It is possible to prevent or suppress the irradiation of the light irradiated from the light output section by inclining the substrate transfer section for transferring the substrate by using the principle that the smoke generated at high temperature rises without using a separate removal device And more particularly to a light sintering apparatus having a slant conveying portion for removing smoke which can be prevented.

The printing technique is a technique of putting a letter or a figure drawn on a sheet surface using ink into a paper or cloth. Recently, various techniques such as inkjet printing, flexographic printing, gravure printing and screen printing have been used . These technologies are applied to high value-added products such as RFID systems, large-area display devices, thin-plate solar cells, and thin-plate batteries, and the demand for technology is increasing.

Particularly, direct patterning technology through inkjet is a technique of forming a wiring by discharging a predetermined amount of ink directly to an accurate position through an inkjet head. Such a technique has the advantage of not only reducing the material cost but also shortening the manufacturing process and time. At present, nano ink using at least one of gold, silver and copper is used as the conductive metal ink for direct patterning. The key technology in inkjet printing is sintering of conductive ink. Up to now, high temperature sintering processes have been used to sinter various particles. In the thermal sintering process, the metal nanoparticles are heated at a temperature of about 200 to 350 ° C. in an inert gas state in order to sinter the metal nanoparticles. In addition, a laser sintering method capable of sintering at room temperature and atmospheric pressure is widely used.

However, recently, attempts have been made to fabricate electronic patterns on flexible low-temperature polymers or paper, and therefore, the high-temperature sintering method has a problem that it is difficult to apply to the printing electronic industry and technology. In addition, copper is known to have a very difficult sintering due to the formation of an oxide layer on its surface due to thermochemical equilibrium, and also to decrease the conductivity after sintering.

In addition, the laser sintering method can only be sintered to a very small area, resulting in poor practicality.

In order to solve these problems, the sintering method using a light sintering method is increasingly used. The light sintering method is a method of sintering an electroconductive ink printed on a substrate by irradiating light of a short pulse by using a light output portion for irradiating light such as white light.

1 is a cross-sectional view showing a general light sintering state. However, the above-described sintering methods including the light sintering method are mostly used for sintering the electroconductive ink printed on the substrate by irradiating the substrate with heat or light of high temperature. As shown in FIG. 1, the light output portion 100 The smoke is generated by the combustion or chemical reaction of the ink during the sintering of the electroconductive ink printed on the substrate 300 using the ink.

When the smoke is generated as described above, the smoke rises upward, blocking the light path by blocking the path of the light emitted from the light output unit 100, or diffusing the light, so that the light emitted from the light output unit 100 is reflected by the substrate 300 ) Is not smoothly irradiated and the light efficiency is lowered.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the conventional problems, and it is an object of the present invention to provide a method and apparatus for separating fumes generated by combustion or chemical reaction of ink during printing of an electrically conductive ink printed on a substrate A slope conveying portion for removing smoke, which can prevent the smoke from interrupting or suppressing the irradiation of light emitted from the light output portion by inclining the substrate conveying portion for conveying the substrate using the principle that the smoke is elevated at a high temperature without using And an object of the present invention is to provide a light sintering apparatus equipped with the same.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to accomplish the object of the present invention, there is provided a light sintering apparatus having a tilting conveyance part for removing smoke, the light sintering apparatus including: a light output unit for irradiating light onto a substrate on which the conductive ink is printed, And the light output portion is provided at a lower portion of the light output portion so as to transfer the substrate to a position corresponding to the light output portion, wherein smoke generated during sintering of the electroconductive ink printed on the substrate is irradiated from the light output portion And a substrate transfer unit provided at an angle to the substrate so as not to block or suppress the irradiation path of the light.

At this time, the substrate transferring portion may be provided with an adjustable tilt angle.

The light output unit may be rotatable or positionally adjustable to adjust an angle of light to be changed according to an inclination angle of the substrate transfer unit.

The substrate transferring unit may further include a substrate holding member on one surface of the substrate transferring unit facing the substrate to stably fix the substrate and prevent wrinkling of the substrate during sintering through the optical output unit.

In addition, the substrate holding member may be a pressure sensitive adhesive pad having one side facing the substrate and having tackiness.

The substrate holding member may be partially provided on one side of the substrate transferring unit.

In addition, the substrate holding member may be an adsorption apparatus having a suction hole formed on a surface facing the substrate.

The light sintering apparatus provided with the inclined transfer portion for removing the smoke of the present invention has the following effects.

First, by using the principle that the smoke generated at the time of sintering of the electroconductive ink printed on the substrate is elevated by the high-temperature smoke, the substrate transferring section is formed obliquely without using a separate apparatus, It is possible to prevent the irradiation path of the light from being inconsistent.

Second, as the smoke deviates from the path of the light emitted from the light output portion through the inclined substrate conveying portion, the factor of lowering the light efficiency such as the irradiation path conversion of the light due to smoke and the decrease of the light transmittance is reduced, .

Third, there is an effect that the substrate mounted on the inclined substrate transferring portion can be stably transferred through the substrate fixing member.

Fourth, the substrate fixing member fixes the substrate through a method such as adhesion or adsorption, thereby suppressing and preventing the occurrence of damage such as wrinkling of the substrate due to heat generated by the light or light irradiated to the substrate during the light sintering .

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, And shall not be interpreted.
1 is a sectional view showing a general light sintering state;
FIG. 2 is a cross-sectional view of a light sintering apparatus having a slant conveyance part for removing smoke according to a first embodiment of the present invention; FIG.
FIG. 3 is a cross-sectional view illustrating the use of a light sintering apparatus having a slant conveying portion for removing smoke according to a first embodiment of the present invention; FIG.
FIG. 4 is a sectional view of a light sintering apparatus having a slant conveyance part for removing smoke according to a second embodiment of the present invention; FIG.
5 is a cross-sectional view of a light sintering apparatus having a tilting conveyance part for removing smoke according to a modification of the second embodiment of the present invention; And
6 is a perspective view of a substrate transferring unit and a substrate holding member according to a third embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

2 is a cross-sectional view of a light sintering apparatus having a slant conveyance unit for removing smoke according to a first embodiment of the present invention. The light sintering apparatus 10 having the inclined transferring unit for removing the smoke according to the first embodiment of the present invention comprises a light output unit 100 and a substrate transfer unit 200.

As shown in FIG. 2, the light output unit 100 may include a light emitting diode (LED) 100 for emitting light for sintering an electroconductive ink such as a fine metal particle or a precursor patterned on a substrate 300 such as a PI film Device. The optical output unit 100 may include a lamp unit 110 and may further include a reflection plate 120 and a light wavelength filter 130 depending on the usage.

The lamp unit 110 is a device for irradiating light for sintering the electrically conductive ink patterned on the substrate 300. The lamp unit 110 may be any device as long as it can irradiate light capable of sintering the electroconductive ink. Preferably, a xenon flash lamp is used. It is preferable to irradiate the sample in the form of The xenon flash lamp consists of a configuration comprising a xenon gas injected into a cylinder-shaped, sealed quartz quartz tube. Xenon gas outputs light energy from input electrical energy, and has an energy conversion rate of more than 50%. In addition, a xenon flash lamp has metal electrodes such as tungsten formed on both sides thereof for anode and cathode formation. When a high power source and a current to be described later are applied to the lamp unit 110 having such a configuration, the injected xenon gas is ionized and a spark is generated between the anode and the cathode. At this time, when the electric charge accumulated in the power storage unit is applied, an arc plasma shape is generated in the lamp unit 110 with a current of about 1000 Adm current for 1 ms to 10 ms through the spark generated in the lamp unit 110, Light is generated. The light generated here is seen as white light since it contains a light spectrum of a wide wavelength band from ultraviolet rays ranging from 160 nm to 2.5 mm to infrared rays. In the present invention, a xenon flash lamp is described as an embodiment, but any type of lamp unit 110 may be used as long as it can achieve such a purpose.

As shown in FIG. 2, the reflection plate 120 is provided at an upper portion of the lamp unit 110, and reflects light radiated upward from the lamp unit 110 to output the reflected light in a downward direction.

As shown in FIG. 2, the light wavelength filter 130 is provided at a lower portion of the lamp unit 110 to filter only extreme ultraviolet light having a predetermined wavelength band. In particular, ultraviolet light emitted from a lamp unit 110 using a xenon flash lamp may damage the substrate 300 made of a polymer material, so that light in the ultraviolet band should be blocked. Depending on the type of the substrate 300 Thereby selectively blocking the wavelength band of the irradiated light.

The substrate transfer unit 200 is an apparatus for transferring at least one substrate 300 to one or both sides. The width of the substrate transferring part 200 corresponds to the width of the substrate 300 and the optical output part 100, and the length of the substrate transferring part 200 is Can be selectively determined in consideration of the number of the substrates 300 to be mounted and the distance to which the substrate 300 is transferred. As described above, the substrate transferring unit 200 may be any device that transfers the substrate 300 through the light output unit 100 and can transfer the electroconductive ink printed on the substrate 300 to be sintered. However, It is preferable to use a conveyor belt, a roller conveying portion composed of a plurality of rollers, or a conveying portion provided so as to enclose the mutually spaced rollers with a belt or the like.

3 is a cross-sectional view showing the use of a light sintering apparatus having a slant conveying portion for removing smoke according to a first embodiment of the present invention. As shown in FIG. 3, the substrate transfer unit 200 having the above-described structure is configured such that smoke (F) generated due to the combustion or chemical reaction of the electroconductive ink during light sintering remains on the light irradiation path, As shown in FIGS. 2 and 3, in order to prevent a decrease in the distance from the horizontal plane. Here, the inclination angle of the substrate transfer unit 200 is determined by considering the amount of smoke (F) generated when the substrate 300 is sintered, the size of the substrate 300, ) Can minimize the residence time in the illumination path of the light.

At this time, the substrate transfer unit 200 may be provided so as to adjust the inclination angle thereof according to the use mode. For example, a linear actuator such as a hydraulic cylinder is connected to one side of the substrate transfer unit 200, and the inclination angle of the substrate transfer unit 200 can be adjusted by driving the linear actuator. The linear actuator may be used to adjust the tilt angle of the substrate transferring part 200. However, any device or method may be used as long as it can control the inclination angle of the substrate transferring part 200 .

As the angle of the substrate transferring part 200 is changed, the irradiation angle of the light irradiated to the substrate transferring part 200 from the optical output part 100 may be changed and the efficiency of light may be reduced. It is preferable to be capable of rotation or position change. In the case where the substrate transferring part 200 and the optical output part 100 are integrally formed, the irradiation angle or the like of the optical output part 100 does not change irrespective of the inclination angle change of the substrate transferring part 200. However, It is preferable that the optical output unit 100 is rotated or changed in position as the irradiation angle of the light irradiated from the optical output unit 100 is changed according to the inclination angle of the substrate transfer unit 200. The configuration of the optical output unit 100 for rotating or changing the position of the optical output unit 100 is not limited to the optical output unit 100. The optical output unit 100 may be disposed at an angle and position that maximizes the light irradiation efficiency according to the inclination angle of the substrate transfer unit 200, Any device and method may be used as long as the device and method can change the angle and position of the antenna.

As shown in FIG. 3, the smoke F generated in the sintering by the light output unit 100 rises to the upper part because it is higher in temperature than air in the atmosphere. Since the optical output unit 100 is provided at a position where the substrate 300 is cured at a predetermined angle with respect to the direction of gravity, the smoke (F) remaining on and flowing on the light irradiation path is minimized, The light irradiated from the output unit 100 is hardly affected by the smoke F. [ Therefore, the efficiency of light emitted from the light output unit 100 can be maximized even if the operator does not blow wind at a certain period of time by using a separate device for removing the smoke (F), thereby maximizing the sintering efficiency of the substrate 300 can do.

Second Embodiment

4 is a cross-sectional view of a photo-sintering apparatus having a slant conveyance portion for removing smoke according to a second embodiment of the present invention. The light sintering apparatus 10 having the inclined transfer unit for removing smoke according to the second embodiment of the present invention has a configuration similar to that of the first embodiment as a whole as shown in FIG. However, the substrate holding member 210 is further provided on one side of the substrate transfer unit 200 to stably fix the substrate 300 and to prevent damage such as deformation of the substrate 300. [ In this embodiment, the substrate fixing member 210, which is different from the first embodiment described above, will be mainly described.

The substrate holding member 210 is provided to enclose at least a part of the substrate transferring unit 200 so that the substrate 300 is adhered or chucked to arbitrarily position the substrate 300 such as a slip of the substrate 300 transferred to the inclined substrate transferring unit 200 And prevents deformation such as wrinkling or warpage of the substrate 300. [0064] As shown in Fig. As described above, the substrate fixing member 210 may be any device as long as it can suppress and prevent damage such as an arbitrary position change or deformation of the substrate 300, It is preferable to use a pressure-sensitive adhesive pad having a pressure-sensitive adhesive property.

As shown in FIG. 4, the substrate fixing member 210 composed of a pressure-sensitive adhesive pad may be provided to cover the entire surface of the substrate transferring part 200 such as a conveyor belt or may be provided with a belt or the like constituting the substrate transferring part 200 May be provided instead.

The substrate holding member 210 having the above-described structure transports the substrate 300 according to the driving direction of the substrate transfer unit 200 while the substrate 300 is adhered and fixed through driving of the substrate transfer unit 200. Even if the substrate 300 is conveyed along the inclined substrate transferring part 200 through the substrate fixing member 210, the substrate 300 can be stably transferred without any positional deformation such as slip or the like, .

It is also confirmed that the substrate 300 is damaged or deformed due to heat generated during sintering through the optical output portion 100 such as a floating, Since the entire surface of the substrate 300 is adhered and fixed, it is possible to suppress or prevent the substrate 300 from being damaged or deformed.

(Modified example)

5 is a cross-sectional view of a light sintering apparatus having a slant conveyance portion for removing smoke according to a modification of the second embodiment of the present invention. 5, the light sintering apparatus 10 having the inclined transferring portion for removing the smoke according to the second embodiment is configured such that the substrate fixing member 210 does not entirely cover the substrate transferring portion 200, As shown in FIG.

At this time, the area of the substrate fixing member 210 may be the same as or larger than the area of the substrate 300. Further, the distance between the substrate holding member 210 and the adjoining substrate holding member 210 can be adjusted so as to correspond to the supply speed of the substrate 300 continuously supplied.

Third Embodiment

6 is a perspective view of a substrate transferring unit and a substrate holding member according to a third embodiment of the present invention. The light sintering apparatus 10 provided with the inclined transferring portion for removing smoke according to the third embodiment of the present invention has a configuration similar to that of the above-described embodiments. However, as shown in FIG. 6, the structure of the substrate transferring part 200 and the substrate fixing member 210 will be described with reference to the modification thereof.

The substrate fixing member 210 may be composed of an adsorption apparatus having a plurality of adsorption holes formed on one surface thereof facing the substrate 300 so that the substrate 300 can be adsorbed and fixed using vacuum adsorption . Such an adsorption apparatus may be any apparatus as long as it is capable of adsorbing the substrate 300 by using vacuum adsorption to fix the substrate 300 and suppressing and preventing deformation of the substrate 300. At this time, the substrate fixing member 210 may be formed to correspond to or relatively larger than the area of the substrate 300 so that at least one substrate 300 can be placed thereon.

The substrate transferring unit 200 may be any device capable of transferring the substrate holding member 210 composed of an adsorption device to one or both sides so that the substrate 300 can move through the optical output unit 100, Do. Preferably, as shown in FIG. 6, it is preferable to use a substrate transfer unit 200 capable of driving the substrate holding member 210 through sliding movement by using a hydraulic or pneumatic cylinder or the like.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: a light sintering apparatus having an inclined conveyance portion for removing smoke
100: light output section
110: lamp unit
120: reflector
130: Optical wavelength filter
200: substrate transfer part
210: substrate fixing member
300: substrate
F: Acting

Claims (7)

A light output unit for irradiating light onto a substrate on which the electroconductive ink is printed to sinter the electroconductive ink printed on the substrate; And
Wherein the substrate is transported to a position corresponding to the light output portion at a lower portion of the light output portion, and smoke generated during sintering of the electroconductive ink printed on the substrate irradiates light irradiated from the light output portion A substrate transfer unit provided at an angle to the substrate to block or inhibit the path;
And a slant conveying portion for removing the smoke. The method according to claim 1,
Wherein the substrate transferring portion includes a tilting conveyance portion for removing smoke, the tilting angle of which is adjustable. 3. The method of claim 2,
Wherein the light output unit includes a tilting conveyance unit for removing smoke, which is rotatable or positionally changeable, in order to adjust an angle of light to be changed according to an inclination angle of the substrate transfer unit. The method according to claim 1,
The substrate transferring portion may include a substrate holding member on one side of the substrate transferring portion to stably fix the substrate and face the substrate in order to prevent wrinkling of the substrate caused by sintering through the optical output portion, The light sintering apparatus comprising: 5. The method of claim 4,
Wherein the substrate fixing member has a tilting conveyance portion for removing smoke, which is a tacky pad having a tackiness on one surface facing the substrate. 6. The method of claim 5,
Wherein the substrate holding member has a slant conveying part for removing the smoke partially provided on one side of the substrate conveying part. 5. The method of claim 4,
Wherein the substrate fixing member has a tilting conveyance part for removing the smoke, which is an adsorption device having a suction hole formed on one surface facing the substrate.

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