US4408213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced bubble recording medium and information record
Assignee: Lockheed Martin Corp
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Filing: 1981-10-30
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Granted: 1983-10-04
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Expires: 2001-10-30
Abstract
Abstract The invention is an improved optical recording medium and information record where information is recorded in the form of one or more bubbles in a light absorptive layer and a reinforcement layer which preferentially adheres to a light absorptive layer during the formation of the bubble. The reinforcement layer provides a path for heat to diffuse away from the bubble, thereby desensitizing the recording process and increasing the range of incident light powers over which a bubble is formed.
Inventors
- 👤 Alan E. Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:35
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/257; G11B7/2578; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24306; G11B2007/24308; G11B2007/24312; G11B2007/25705; G11B2007/25706; G11B2007/25708; G11B2007/2571; G11B2007/25715; G11B7/253; G11B7/2531; G11B7/2532; G11B7/2533; G11B7/258; G11B7/2585; G11B7/2595; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
87 words
An optical recording medium comprising a substrate; a spacer layer overlying a surface of the substrate; a substantially transparent reinforcement layer overlying the spacer layer; and a light absorptive layer overlying the spacer layer; wherein the spacer layer melts, sublimes or decomposes at a temperature less than the melting temperature of the light absorptive layer and wherein the reinforcement layer does not melt, sublime or decompose at a temperature less than the melting temperature of the light absorptive layer and preferentially adheres to the light absorptive layer.
Claim 2
Dependent Claim
87 words
An optical recording medium comprising a substrate; a spacer layer overlying a surface of the substrate; a substantially transparent reinforcement layer overlying the spacer layer; and a light absorptive layer overlying the spacer layer; wherein the spacer layer melts, sublimes or decomposes at a temperature less than the melting temperature of the light absorptive layer and wherein the reinforcement layer does not melt, sublime or decompose at a temperature less than the melting temperature of the light absorptive layer and preferentially adheres to the light absorptive layer.
Claim 3
Dependent Claim
19 words
The article of claim 1 wherein a light reflective layer is interposed between the substrate and the spacer layer.
Claim 4
Dependent Claim
104 words
An information record comprising a substrate; a spacer layer overlying the surface of the substrate; a substantially transparent reinforcement layer overlying the spacer layer; and a light absorptive layer overlying the spacer layer; wherein the spacer layer melts, sublimes or decomposes at a temperature less than the melting temperature of the light absorptive layer wherein the reinforcement layer does not melt, sublime or decompose at a temperature less than the melting temperature of the light absorptive layer and preferentially adheres to the light absorptive layer and wherein information is recorded as one or more bubbles in the reinforcement layer and the light absorptive layer.
Claim 5
Dependent Claim
104 words
An information record comprising a substrate; a spacer layer overlying the surface of the substrate; a substantially transparent reinforcement layer overlying the spacer layer; and a light absorptive layer overlying the spacer layer; wherein the spacer layer melts, sublimes or decomposes at a temperature less than the melting temperature of the light absorptive layer wherein the reinforcement layer does not melt, sublime or decompose at a temperature less than the melting temperature of the light absorptive layer and preferentially adheres to the light absorptive layer and wherein information is recorded as one or more bubbles in the reinforcement layer and the light absorptive layer.
Claim 6
Dependent Claim
19 words
The article of claim 3 wherein a light reflective layer is interposed between the substrate and the spacer layer.
Claim 7
Dependent Claim
24 words
The article of claim 1, 2, 3 or 4 wherein the thickness of the reinforcement layer is between about 10 and about 40 nanometers.
Claim 8
Dependent Claim
27 words
The article of claim 5 wherein the reinforcement layer is composed of a material selected from the group consisting of silicon dioxide, titanium dioxide and aluminum oxide.
Claim 9
Dependent Claim
19 words
The article of claim 1 or 3 wherein the spacer layer has a thickness greater than about 10 nonometers.
Claim 10
Dependent Claim
20 words
The article of claim 7 wherein the light absorptive layer has a thickness between about 10 and about 50 nanometers.
Claim 11
Dependent Claim
21 words
The article of claim 2 or 4 wherein the spacer layer has a thickness between about 10 and about 500 nanometers.
Claim 12
Dependent Claim
20 words
The article of claim 9 wherein the light absorptive layer has a thickness between about 3 and about 30 nanometers.
Claim 13
Dependent Claim
41 words
The article of claim 1 or 3 wherein the spacer layer is composed of a material selected from the group consisting of magnesium fluoride, lead fluoride, polymerized hydrocarbons, flurocarbons and chlorocarbons, thermoplastics and monomers such as sucrose benzoate and sucrose octoacetate.
Claim 14
Dependent Claim
33 words
The article of claim 1 or 3 wherein the light absorptive layer is composed of a material selected from the group consisting of titanium, platinum, rhodium, gold, nickel, chromium, manganese, vanadium and germanium.
Claim 15
Dependent Claim
16 words
The article of claim 1 or 3 wherein the light absorptive layer is composed of titanium.
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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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |