EP0368442A2
Expired / Lapsed
EP
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Optical information record carrier and the method of producing the same
Assignee: Pioneer Corp
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Filing: 1989-07-20
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Granted: —
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Expires: 2009-07-20
Abstract
Abstract An optical information record carrier, in the form of an optical disk, has multiple reflective surfaces (12,15), each carrying separate information and each readable by an optical beam directed from the same side of the record carrier. The topmost reflective surface (12) reflects light of a first waveband and passes light of a second waveband. The next topmost reflective layer (15) reflects light within at least part of the second waveband. The record carrier may be formed by producing a first reflective layer (12) having a first pit pattern in the surface of a transparent substrate (11), pressing the first substrate/layer combination to a transparent stamper (13) having a second pit pattern, with a radiation hardening liquid resin (14) therebetween, irradiating the resin by applying radiation to the resin through the stamper, peeling off the stamper, applying a second reflective layer (15) to the hardened resin surface opposite the surface in contact with the first reflective layer, and applying a protective layer (16) to the second reflective layer.
Inventors
- 👤 Tetsuya Pioneer Electronic Corporation Iida
- 👤 Takanobu Pioneer Electronic Corporation Higuchi
- 👤 Kunizo Pioneer Electronic Corporation Ogoshi
- 👤 Shinichi Pioneer Electronic Corporation Yokozeki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 23:01
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/26; B; B29; B29D; B29D17/00; B29D17/005
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
81 words
An optical information record carrier of the type which is read by directing an optical beam towards one surface thereof, the record carrier comprising: a plurality of reflective layers (12,15) of differing optical reflective properties laminated together; each of the reflective layers containing a pattern of information thereon readable by an optical beam; and the reflective layer (12) closest to the one surface being transmissive to light of an optical wavelength to which another (15) of the reflective layers is reflective.
Claim 2
Dependent Claim
81 words
An optical information record carrier of the type which is read by directing an optical beam towards one surface thereof, the record carrier comprising: a plurality of reflective layers (12,15) of differing optical reflective properties laminated together; each of the reflective layers containing a pattern of information thereon readable by an optical beam; and the reflective layer (12) closest to the one surface being transmissive to light of an optical wavelength to which another (15) of the reflective layers is reflective.
Claim 3
Dependent Claim
20 words
A record carrier according to claim 1, wherein each of the reflective layers has a pit pattern representing information thereon.
Claim 4
Dependent Claim
25 words
A record carrier according to claim 1 or claim 2, wherein the first reflecting layer (12) is silicon and another reflecting layer (15) is aluminium.
Claim 5
Dependent Claim
52 words
A record carrier according to any of claims 1 to 3, wherein the laminated structure including the reflective layers comprises in the following order from the one surface, a transparent substrate (11), the first reflective layer (12), a radiation hardened resin (13), a second reflective layer (15), and a protective layer (16).
Claim 6
Dependent Claim
27 words
A record carrier according to claim 1, claim 2 or claim 4, wherein the reflective layers are multi-layered dielectric reflecting layers having a narrow reflection light band.
Claim 7
Dependent Claim
25 words
An optical information record carrier comprising a plurality of reflecting layers (12,15), respectively having reflection light bands different from each other, laminated to one another.
Claim 8
Dependent Claim
25 words
An optical information record carrier comprising a plurality of reflecting layers (12,15), respectively having reflection light bands different from each other, laminated to one another.
Claim 9
Dependent Claim
18 words
A record carrier according to claim 6, wherein each of the reflecting layers has fine recesses and protrusions.
Claim 10
Dependent Claim
27 words
A record carrier according to claim 6 or claim 7, further comprising a plurality of transparent layers (11,14), one interposed between adjacent ones of the reflecting layers.
Claim 11
Dependent Claim
41 words
A record carrier according to claim 7 or claim 8, wherein at least one of the reflecting layers comprises a two-reflecting-layer structure in which one of the two reflecting layers is made of silicon and the other is made of aluminium.
Claim 12
Dependent Claim
31 words
A record carrier according to claim 8, wherein the transparent layers (11,14) comprise radiation setting resin, the reflecting layers (12,15) allowing radiation for hardening the radiation setting resin to pass therethrough.
Claim 13
Dependent Claim
19 words
A record carrier according to any of claims 6 to 10, wherein the reflecting layers comprise dielectric multi-layer films.
Claim 14
Dependent Claim
21 words
A record carrier according to claim 8 or claim 11, wherein each of the transparent layers has fine recesses and protrusions.
Claim 15
Independent Claim
102 words
A method of producing an optical information record carrier comprising the steps of: forming a first reflecting layer (12) on a transparent substrate (11); holding a transparent stamper (13) having radiation transmitting property on the first reflecting layer (12) through a liquid radiation setting resin (14); irradiating the radiation setting resin with radiation from the transparent stamper side; peeling off the transparent stamper from the radiation setting resin layer after it has hardened; forming a second reflecting layer (15) on the hardened resin layer; and laminating a protective layer (16) on to the second reflecting layer to protect the second reflecting layer.
Claim 16
Independent Claim
102 words
A method of producing an optical information record carrier comprising the steps of: forming a first reflecting layer (12) on a transparent substrate (11); holding a transparent stamper (13) having radiation transmitting property on the first reflecting layer (12) through a liquid radiation setting resin (14); irradiating the radiation setting resin with radiation from the transparent stamper side; peeling off the transparent stamper from the radiation setting resin layer after it has hardened; forming a second reflecting layer (15) on the hardened resin layer; and laminating a protective layer (16) on to the second reflecting layer to protect the second reflecting layer.
Claim 17
Dependent Claim
21 words
A method according to claim 13, wherein each of the first and second reflecting layers has fine recess and protrusion portions.
Claim 18
Dependent Claim
29 words
A method according to claim 13 or claim 14, wherein the first reflecting layer (12) is made of silicon andd the second reflecting layer (15) is made of aluminium.
Claim 19
Dependent Claim
22 words
A method according to claim 13 or claim 14, wherein the first and second reflecting layers are made of multi-layer dielectric films.
Claim 20
Independent Claim
25 words
A method according to any of claims 13 to 16, wherein the transparent stamper is made of glass or plastics having a radiation transmitting property.
Claim 21
Independent Claim
110 words
A method of producing an optical information record carrier comprising the steps of: forming a first reflecting layer (12) having a first reflection light band on a transparent substrate (11); holding a stamper (13) on the first reflecting layer through a liquid radiation setting resin (14); irradiating the radiation setting resin with radiation through the first reflecting layer (12) to harden the radiation setting resin so as to form a transparent layer; peeling off the stamper from the transparent layer; and forming a second reflecting layer (15) on the transparent layer, the second reflecting layer having a second reflection light band which is different from the first reflection light band.
Claim 22
Independent Claim
110 words
A method of producing an optical information record carrier comprising the steps of: forming a first reflecting layer (12) having a first reflection light band on a transparent substrate (11); holding a stamper (13) on the first reflecting layer through a liquid radiation setting resin (14); irradiating the radiation setting resin with radiation through the first reflecting layer (12) to harden the radiation setting resin so as to form a transparent layer; peeling off the stamper from the transparent layer; and forming a second reflecting layer (15) on the transparent layer, the second reflecting layer having a second reflection light band which is different from the first reflection light band.
Claim 23
Dependent Claim
22 words
A method according to claim 18, wherein each of the reflecting layers and the transparent layer has fine recess and protrusion portions.
Claim 24
Dependent Claim
25 words
A method according to claim 18 or claim 19, wherein each of the first and second reflecting layers is constituted by a dielectric multi-layer film.
References Cited (Backward Citations)
No citation records indexed.
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