US5202220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an optical recording medium with a transparent conductive layer
Assignee: SKC Co Ltd
•
Filing: 1992-01-09
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Granted: 1993-04-13
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Expires: 2012-01-09
Abstract
Abstract An optical recording medium is disclosed herein which comprises an antistatic and scratch-resistant metal oxide layer on the light incident side of a transparent substrate. The metal oxide layer has a light transmittance high enough to transmit at least a portion of the light beam therethrough and a sheet resistivity low enough to suppress the substrate from getting electrostatic. Such a metal oxide layer can be deposited either directly, or through an interfence layer, on the substrate with a thickness of 100 to 1,000 Angstrom.
Inventors
- 👤 Gyou-Tae Park
- 👤 Dong-Soo Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:24
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/254; G11B7/2548; G11B7/2542; G11B7/26; G11B7/2403; G11B7/24056; G11B7/256; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
In a method of producing an optical recording medium by way of: providing a transparent substrate having first and second opposite surfaces, forming a resin layer and a conductive oxide layer one above the other on the second surface of said substrate, and depositing a recording layer on the first surface of said substrate, the improvement which comprises: depositing said resin layer on the second surface of said substrate prior to forming any other layers of the optical recording medium; and, thereafter, placing said conductive layer over the resin layer, said conductive layer having a light transmittance of no less than 85% and a sheet resistivity of no greater than 10 3 Ω/cm 2 .
Claim 2
Dependent Claim
115 words
In a method of producing an optical recording medium by way of: providing a transparent substrate having first and second opposite surfaces, forming a resin layer and a conductive oxide layer one above the other on the second surface of said substrate, and depositing a recording layer on the first surface of said substrate, the improvement which comprises: depositing said resin layer on the second surface of said substrate prior to forming any other layers of the optical recording medium; and, thereafter, placing said conductive layer over the resin layer, said conductive layer having a light transmittance of no less than 85% and a sheet resistivity of no greater than 10 3 Ω/cm 2 .
Claim 3
Dependent Claim
32 words
The method as recited in claim 1, wherein said conductive layer comprises 0.1 to 10% by weight of SnO 2 and 99.9 to 90% by weight of In 2 O 3 .
Claim 4
Dependent Claim
32 words
The method as recited in claim 1, wherein said conductive layer comprises 0.1 to 10% by weight of Sb 2 O 3 and 99.9 to 90% by weight of SnO 2 .
Claim 5
Dependent Claim
30 words
The method as recited in claim 1, wherein said conductive layer comprises 0.1 to 10% by weight of Al 2 O 3 and 99.9 to 90% by weight of ZnO.
Claim 6
Dependent Claim
28 words
The method as recited in claim 1, wherein said conductive layer comprises 20 to 50% by weight of SnO 2 and 80 to 50% by weight of CdO.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |