CN1151501C

CN1151501C - Method for producing multiple layer optic recording medium by rotary coating and press moulding mode

Info

Publication number: CN1151501C
Application number: CNB001090852A
Authority: CN
Inventors: 黄得瑞
Original assignee: Industrial Technology Research Institute ITRI
Current assignee: Industrial Technology Research Institute ITRI
Priority date: 2000-06-06
Filing date: 2000-06-06
Publication date: 2004-05-26
Anticipated expiration: 2020-06-06
Also published as: CN1327233A

Abstract

The present invention relates to a method for producing multilayer optical recording media by way of rotational plating and molding. The present invention mainly uses the way of rotational coating to uniformly coat a macromolecular solution onto a base material and stamp record messages onto a macromolecular solution layer through a template before the macromolecular solution layer is completely hardened. Therefore, record messages on the template can be copied under the conditions of normal temperature and slight pressure, and the present invention has the efficacy of high stability and is suitable for the mass production of multilayer optical recording media.

Description

Make the method for multilayer optical recording medium with rotary coating and press moulding mode

Technical field

The present invention is the method for making of relevant a kind of optical record medium, the method that particularly a kind of mode of utilizing rotary coating and press moulding is made multilayer optical recording medium.

Background technology

Traditional C D series CD-RW discsCD-RW is the structure of single-surface single-layer now, CD CD-RW discsCD-RW with 12 centimeters diameters of a slice, it can be about 650MB by the use capacity, and nearly DVD that began to release in 2 years only reads the type CD-RW discsCD-RW then four kinds of different specifications such as single-surface single-layer structure, single-surface double-layer structure, two-sided single layer structure and two-sided double-decker.DVD-ROM CD-RW discsCD-RW with 12 centimeters diameters of a slice, the spendable basic tankage of single-surface single-layer structure is 4.7GB (DVD-5), two-sided bilayer is 17GB (DVD-18), present DVD-5 (4.7GB), the existing commodity of DVD-9 (8.5GB) and DVD-10 (9.4GB) are released, and DVD-18 (17GB) does not still have commercial prod to occur though specification is arranged, and it mainly is to have its bottle top to exist on method for making.

Wherein, the specification of two-sided DVD-dual layer-ROM CD-RW discsCD-RW is on the substrate (Substrate) of single face 0.6mm thickness two-layer recording layer to be arranged, semi-reflective layer is arranged (as Au between the two-layer recording layer, SiN etc.), then plate total reflection layer (as AL etc.) on the second layer recording layer, again that the total reflection aspect of the 0.6mm thick substrate of two single face double record layer is glued together, promptly become two-sided bilayer and only read type DVD CD-RW discsCD-RW.Will make at present two-sided bilayer technically only reads the possible method of type DVD CD-RW discsCD-RW and has following three kinds:

(1) method with injection mo(u)lding (Injection Molding) directly penetrates two-sided double-layer CD sheet;

The method is stationary plane and the all-moving surface that two templates (Stamper) that signal arranged is placed on jetting mold respectively, directly plastics (as Poly carbonate) is pressed in the mould (Cavity) with High Temperature High Pressure again, penetrates the film that two-sided signal is arranged.This practice is because of the need High Temperature High Pressure, the abrasion of envelope template are quite serious, in addition, during by the plastic cement finished product that take out to penetrate in the mould, its thickness again can not be too thin, agrees with the distortion change of the product of finishing to open because thermal stress or plastic cement shrink inequality again, often exceeds the requirement of specifications, therefore, this method is less feasible.

(2) make of photopolymer (Photo-Polymer (2P)) method:

The method is to be coated with the easily deformable macromolecular material of one deck earlier on the template of existing signal, utilize high pressure that these macromolecular materials are pressed to template, so as to the signal on the transfer printing template, utilize ultraviolet ray (UV) irradiation to make its sclerosis (Curing) again, then the thin layer after this sclerosis being bonded in another has the record signal also need plate on the substrate of semi-reflective layer, plate on the thin layer that sticks in sputter (Sputtering) mode again and be all-trans, just formed the structure of the CD-RW discsCD-RW of single-surface double-layer to layer.The fully reflecting surface of the substrate of the single-surface double-layer of two 0.6mm thickness is bonded together, can become the DVD CD-RW discsCD-RW (as DVD-18) of two-sided bilayer, this method has during the Hitachi of Japan and some companies such as WAMO of the U.S. actively test at present, the method might be made CD-RW discsCD-RW such as DVD-18, but its shortcoming is for obtaining good signal transfer printing with the high pressure mode, abrasion to plate are serious, in addition at bonding technical elements, need the high yield of control quite to be not easy.

(3) with spin coating and (Spin-On And Peel (the SOAP)) method of peeling off make:

The method is the spin coating of being invented of U.S. PicoMedia company and peels off the method that (SOAP) makes film, its method is that a kind of high-molecular resin solution is dropped on the template in the rotation, then, changeing this high-molecular resin solution of coating covers on the whole template, after the solvent evaporates sclerosis of this macromolecule resin, form that film that one deck contains signal has this film and another layer layer and the base plate bonding that is coated with semi-reflective layer becomes to have the mating plate of double-deck signal, on this film that is stained with, utilize method for sputtering to plate total reflection layer (as AL etc.), then become real single-surface double-layer and only read type DVD CD-RW discsCD-RW (as DVD-18).

By above-mentioned three kinds of methods, we second may make single face multilayer optical disc sheet or two-sided bilayer is only read type DVD CD-RW discsCD-RW (DVD-18) with the third method as can be seen, but these two kinds of methods all have film to be bonded in processing procedure on the substrate, on processing procedure, easily cause oxygen bubble (Bubble) or wrinkle phenomenons such as (Wrinkle), cause the not high puzzlement of fine ratio of product.Therefore, the problem that the present invention is directed to said method do not need to propose the new method of the bonding processing procedure of film, can be easier to produce the multilayer optical disc sheet.

Summary of the invention

The main purpose of the present invention promptly is that a kind of bonding processing procedure of avoiding film and substrate will be provided, and reaches the method for the making multilayer optical recording medium of high yield.

Though aforementioned 2P method and SOAP method may be produced the CD-RW discsCD-RW of single face multilayer or two-sided bilayer etc., but these two kinds of methods all have the fabrication steps of film substrate gummed, cause the phenomenon of oxygen bubble (Bubble) or wrinkle (Wrinkle) easily, cause the manufacturing process yield to be difficult for the problem that promotes, rotary coating and press moulding method (the Spin Coating and Pressing that the present invention is used, SCP), the processing procedure of this film gummed will be avoided, directly the mode of Polymer Solution with rotary coating overlayed on the base material, again by this Polymer Solution layer as yet not fully the sclerosis stage, the template that will have the record signal at normal temperatures borrows slight pressure directly to be pressed together on this Polymer Solution film, utilize ultraviolet ray to be solidified simultaneously and produce the signal layer, the method needn't be used the processing procedure of High Temperature High Pressure in the processing procedure of multilayer optical disc sheet volume production, therefore, can not cause the phenomenon of oxygen bubble or wrinkle, the life-span of template is prolonged, and can reach higher fine ratio of product.

The first embodiment of the present invention ties up on the blank plane substrate, makes the first signal layer and the second signal layer respectively with the SCP method, and gets the optical record medium of a single-surface double-layer.

In a second embodiment, tie up to one and have on the base material of the first signal layer, make the second signal layer with the SCP method again, also get the optical record medium of a single-surface double-layer.

And the 3rd embodiment system interosculates the single-surface double-layer optical record medium that first embodiment and the second embodiment made get face-to-face with its total reflection layer, then forms the optical media of a two-sided bilayer.

The 4th embodiment lies in the manufacturing process of first embodiment and second embodiment again, and the step of making the signal layer with the SCP legal system repeats to implement, and whereby, can form the optical media of three layers of single faces, even can form the optical record medium of single face multilayer.

Description of drawings

1A-1H figure is at blank plane substrate manufacture single-surface double-layer optical record medium implementation step figure by SCP method of the present invention;

2A-2F figure is the implementation step figure that makes the single-surface double-layer optical record medium by SCP method of the present invention on the substrate that the record message is arranged;

The 3rd figure is a structural representation of making two-sided double-layer CD sheet by SCP method of the present invention;

The 4th figure is another structural representation of making two-sided double-layer CD sheet by SCP method of the present invention.

The 5th figure is a structural representation of making three layers of CD-RW discsCD-RW of single face by SCP legal system of the present invention; And

The 6th figure is another structural representation of making three layers of CD-RW discsCD-RW of single face by SCP legal system of the present invention.

Embodiment

Relevant detailed content of the present invention and technology, this just cooperates graphic being described as follows:

The disclosed making multilayer optical recording medium of the present invention method, system emphasizes earlier with revolving the method for plating (SpinCoating) with Polymer Solution, the acrylic polymers (Acrylic polymer) of macromolecule resin (Polymer resien) class for example, polyetherimide (Poly-Ether-Imide (PEI)), photosensitive acid imide (photo Imide (PI) etc., be coated on the substrate, by the technology control of revolving plating, as revolve the plating speed concentration etc. of Polymer Solution therewith, the thickness of this Polymer Solution layer is evenly distributed in the scope that is about 10 μ m-100 μ m thickness, again with the template that has record signal pattern at normal temperature, be stamped on the Polymer Solution layer that does not harden fully with slight pressure, make and produce the record signal on this Polymer Solution layer, after the process of UV cured (UVCuring), template is taken away, then can make the Polymer Solution layer of this layer become the signal layer that one deck has the record signal through revolving plating, so repeatedly repeat the multilayer optical recording medium that the SCP processing procedure then can produce multilayer signal layer, according to this SCP method we can the following example concrete implementation step do an explanation.

Embodiment one

At first, see also shown in (1A-1H figure), system is illustrated in blank plane substrate (Mirror Substrate) and goes up the detailed implementation step figure that makes the single-surface double-layer optical record medium of the SCP method, this embodiment is to be that the blank plane substrate 10 of 1.2mm (or 0.6mm) is placed on and changes coating machine (Spin Coater) and go up (1A figure) with a thickness, rotary coating one Polymer Solution layer 12 is in substrate 10 (1B figure), its thickness is about 15-25 μ m, with a template 30 with record signal message is stamped in (1C figure) on this still unhardened Polymer Solution layer 12 again, simultaneously with its curing, after treating these Polymer Solution layer 12 sclerosis, template 30 is taken away, promptly be formed with the first signal layer 13 (1D figure) of message, on this thin layer 13, plate semi-reflective layer 14 (1E figure) with sputter (Sputtering) method, wherein, the thickness of semi-reflective layer 14 is about 10-30nm, and the material of semi-reflective layer 14 is metal or dielectric material, for example golden (Au), aluminium (Al), silver (Ag), silicon (Si), aluminium nitride (AIN), silicon nitride (SiN) and carbonization silicon materials such as (SiC), again with another floor height molecular solution layer 16 (1F figure) on the SCP method rotary coating, also adopt foregoing method impression to go up signal, then produce the second signal layer 17 (1G figure), on this second signal layer 17, utilize method for sputtering to plate the identical total reflection layer 20 (1H figure) of a material character and semi-reflective layer 14 more then, so promptly become a single-surface double-layer CD-RW discsCD-RW.

Embodiment two

Then, shown in (as 2A-2F figure), system is illustrated in the detailed implementation step figure that makes the single-surface double-layer optical record medium on the substrate 40 that writes down message of the SCP method, the method is to be the substrate 40 (2A figure) that the ejaculation of 1.2mm (or 0.6mm) has the record message with a thickness, earlier plate one deck semi-reflective layer 42 (2B figure) with method for sputtering, again this substrate 40 is placed on the rotary coating machine, coating Polymer Solution layer 44 (2C figure) above semi-reflective layer 42, its thickness is about 40-50 μ m, with a template 60 with record signal message is stamped in (2D figure) on this still unhardened Polymer Solution layer 44 then, after treating these Polymer Solution layer 44 sclerosis, template 60 is taken away, promptly form the second signal layer 45 (2E figure) with message, on this second signal layer 45, plate total reflection layer 50 (2F figure) with method for sputtering then, so promptly become a single-surface double-layer CD-RW discsCD-RW.

Embodiment three

Please refer to (the 3rd figure) and (the 4th figure), is the structure of making two-sided double-layer CD sheet (as DVD-18) by SCP method of the present invention.Wherein, (the 3rd figure) ties up to the single-surface double-layer CD-RW discsCD-RW that obtains at last among the embodiment one, comprise

substrate

10a, 10b, the

first signal layer

13a, 13b,

semi-reflective layer

14a, 14b, the

second signal layer

17a, 17b and

total reflection layer

20a, 20b, total reflection layer 20a with these two single-surface double-layer CD-RW discsCD-RW, 20b is bonded together face-to-face mutually, promptly become a complete two-sided double-layer CD sheet, if among the embodiment that uses a diameter of produced single-surface double-layer CD-RW discsCD-RW be 0.6mm, and the message that is impressed is the specification of DVD, then becomes the DVD-18 of two-sided bilayer after then the total reflection layer of these two single-surface double-layers is bonded together.

And (the 4th figure) ties up to last resulting single-surface double-layer CD-RW discsCD-RW among the embodiment two, comprise

substrate

40a, 40b,

semi-reflective layer

42a, 42b, the

second signal layer

45a, 45b, with these two lists and total reflection layer 50a, the 50b of double-layer CD sheet are bonded together face-to-face mutually, promptly become a complete two-sided double-layer CD sheet.

Embodiment four

Please refer to (the 5th figure) again, it is the structure of making three layers of CD-RW discsCD-RW of single face by SCP method of the present invention, wherein, the single-surface double-layer CD-RW discsCD-RW of (1G figure) gained in embodiment one is not before adding total reflection layer 20 as yet, again via the processing procedure of (1E Tu-1G figure) step among the embodiment one, semi-reflective layer 18 on sputter on the second signal layer 17, utilize the SCP method to make the 3rd signal layer 19, total reflection layer 20 on sputter can obtain three layers of CD-RW discsCD-RW of a single face at last.

And (the 6th figure) also is another example of making three layers of CD-RW discsCD-RW of single face by SCP method of the present invention, wherein, the single-surface double-layer CD-RW discsCD-RW of (2E figure) gained is not before adding total reflection layer 50 as yet in embodiment two, again via the processing procedure of (2B Tu-2E figure) step among the embodiment two, semi-reflective layer 46 on sputter on the second signal layer 45, utilize the SCP method to make the 3rd signal layer 47, total reflection layer 50 on the sputter more also can obtain three layers of CD-RW discsCD-RW of a single face at last.

Therefore, by embodiment four as can be seen, repeat following steps: form semi-reflective layer on previous signal layer, rotary coating Polymer Solution layer is on semi-reflective layer again, the person of connecing, and impression block is in the Polymer Solution layer of sclerosis fully not, and solidify the Polymer Solution layer and become another signal layer, lift-off stencil signal layer therewith then can form plural layer signal layer successively again, can produce more multi-layered optical record medium again.

SCP method according to the present invention is unlike the record message of using on the 2P method needs high pressure reflex pallet, and cause the problem of the bigger abrasion of template easily, in addition, when the present invention does not then have the glue record layer film compared with 2P and two kinds of methods of SOAP on processing procedure, be easy to generate the puzzlement of foam and wrinkle.

Moreover, the present invention is more than injection forming method, because of jet forming method needs High Temperature High Pressure, so serious wear of template, the thickness of jet forming method gained will be controlled at below 100 and be not easy simultaneously, and the present invention can be easy to control the macromolecule recording sheet between 10-100, needn't use the process of High Temperature High Pressure.In sum, the present invention has sizable advantage compared with 2P method, SOAP method and mechanical jet forming method as can be seen.

The method of disclosed making multilayer optical recording medium according to the present invention, its effect is:

1, can duplicate record message on the template under normal temperature and light pressure, the degree of stability height is fit in order to the volume production multilayer optical recording medium;

2, the process of High Temperature High Pressure needn't be used,, the life-span of template can be prolonged so the abrasion that template suffered are less; And

3, can be easy to control the formed signal layer thickness of Polymer Solution layer between 10-100 μ m.

Though above invention has been described in conjunction with most preferred embodiment, this description is not a limitation of the invention.Under the premise without departing from the spirit and scope of the present invention, those skilled in the art can change and revise.So protection scope of the present invention is to be limited by the accompanying claims.

Claims

1, a kind ofly form the method contain the recording layer that writes down message with rotary coating and press moulding mode, this method comprises at least:

Utilize the mode of rotary coating evenly to be coated with high-molecular resin solution at the substrate surface of optical record medium;

As yet fully before the sclerosis, utilize one to include the template that writes down message message is stamped on this high-molecular resin solution at this high-molecular resin solution; And

Solidify this high-molecular resin solution, and the high-molecular resin solution of this template and this curing is peeled off, and make the high-molecular resin solution of this curing become the recording layer that records this message.

2, as claimed in claim 1ly form the method contain the recording layer that write down message with rotary coating and press moulding mode at optical record medium, wherein the thickness of this high-molecular resin solution layer is between 10 μ m-100 μ m.

3, as claimed in claim 1ly form the method contain the recording layer that write down message with rotary coating and press moulding mode at optical record medium, wherein this macromolecule resin is to be selected from the group that acrylic polymers, polyetherimide, photosensitive acid imide constitute.

4, as claimed in claim 1ly form the method contain the recording layer that write down message with rotary coating and press moulding mode at optical record medium, wherein this high-molecular resin solution can utilize ultraviolet ray to shine to be solidified.

5, as claimed in claim 1ly form the method contain the recording layer that write down message with coating and press moulding mode at optical record medium, wherein this high-molecular resin solution can be solidified by means of the mode of spontaneous curing.

6, a kind of method of making multilayer optical recording medium with rotary coating and press moulding mode, its step comprises:

Base material with one first signal layer is provided and has the template of a record message pattern;

Form a semi-reflective layer in this first signal layer;

Rotary coating one high-molecular resin solution layer is in this semi-reflective layer;

Impress this template in this high-molecular resin solution layer of sclerosis fully not, and solidify this high-molecular resin solution layer and become one second signal layer;

This template is peeled off from this second signal layer; And

Form a total reflection layer in this second signal layer, to form the optical record medium of a single-surface double-layer.

7, as claimed in claim 6ly make the method for multilayer optical recording medium, wherein before forming this total reflection layer step, more comprise by repeating the following step to make the single face multilayer optical recording medium to revolve the mode of being pressure-plated with:

Form a semi-reflective layer in aforesaid signal layer;

This high-molecular resin solution layer of rotary coating is in this semi-reflective layer;

Impress this template in this high-molecular resin solution layer of sclerosis fully not, and solidify this high-molecular resin solution layer and become a signal layer; And this template and this signal layer peeled off, to form this signal layer of plural layer successively.

8, method of making multilayer optical recording medium with the rotation press moulding mode as claimed in claim 7 wherein more comprises the substrate that has this signal layer of plural layer with two, and being harmonious face-to-face with this total reflection layer forms the optical record medium of a slice double-sided multi-layer.

9, method of making multilayer optical recording medium with rotary coating and press moulding mode as claimed in claim 6 can be by adding ultraviolet ray to solidify this high-molecular resin solution layer.

10, method of making multilayer optical recording medium with rotary coating and press moulding mode as claimed in claim 6, wherein this high-molecular resin solution layer can borrow the mode of spontaneous curing to make it to solidify.

11, method of making multilayer optical recording medium with rotary coating and press moulding mode as claimed in claim 6, wherein the thickness of this high-molecular resin solution layer system is between 10 μ m-100 μ m.

12, method of making multilayer optical recording medium with rotary coating and press moulding mode as claimed in claim 6, wherein this macromolecule resin system is selected from the group that acrylic polymers, polyetherimide, photosensitive acid imide constitute.

13, method of making multilayer optical recording medium with rotary coating and press moulding mode as claimed in claim 6, wherein the thickness of this semi-reflective layer is about 10-30nm.

14, method of making multilayer optical recording medium with rotary coating and press moulding mode as claimed in claim 6, wherein the material of this semi-reflective layer is metal or dielectric material.

15, method of making multilayer optical recording medium with rotary coating and press moulding mode as claimed in claim 14, wherein the material of this semi-reflective layer system is selected from the group that gold, aluminium, silver, silicon, aluminium nitride, silicon nitride and carbonization silicon are constituted.

16, method of making multilayer optical recording medium with coating and press moulding mode as claimed in claim 6, wherein this totally reflected material is metal or dielectric material.

17, method of making multilayer optical recording medium with rotary coating and press moulding mode as claimed in claim 16, wherein this totally reflected material is to be selected from the group that gold, aluminium, silver, silicon, aluminium nitride, silicon nitride and carbonization silicon are constituted.