EP0130698A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cost-reduced optical memory disk
Assignee: Unisys Corp
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Filing: 1984-06-01
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Granted: —
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Expires: 2004-06-01
Abstract
Abstract An optical disk is created by depositing a trilayer structure upon a transparent substrate. The substrate, which can be stamped out of a continuous polymeric web, acts as a protective cap. A rigid carrier may be attached for stability. Double-sided disks can also be produced.
Inventors
- 👤 Neville Lee
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/26; G11B7/24018; G11B7/241; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24308; G11B7/252; G11B7/253; G11B7/2532; G11B7/2533; G11B7/254; G11B7/2542; G11B7/256; G11B7/257; G11B7/2572; G11B7/258; G11B7/2585
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
39 words
A recording disk responsive to a write-radiation beam of prescribed energy and wavelength, this disk comprising: A sealed memory unit comprising a clear substrate thickness transparent to said radiation beam and a radiation-memory structure overlaid on this substrate thickness.
Claim 2
Dependent Claim
39 words
A recording disk responsive to a write-radiation beam of prescribed energy and wavelength, this disk comprising: A sealed memory unit comprising a clear substrate thickness transparent to said radiation beam and a radiation-memory structure overlaid on this substrate thickness.
Claim 3
Dependent Claim
16 words
.2. The invention of claim 1 wherein the substrate thickness comprises a defocusing-thickness of clear polymer.
Claim 4
Dependent Claim
39 words
The invention of claim 2 wherein the memory structure comprises a non-ablative island-absorber-film deposited on a surface of the polymer substrate plus an anti-reflective thickness overlaid on this absorber film, this polymer surface being adapted to enhance island deposition.
Claim 5
Dependent Claim
18 words
The invention of claim 3 wherein the anti-reflective thickness comprises a polymeric optical spacer and a reflector film.
Claim 6
Dependent Claim
26 words
The invention of claim 2 wherein rigid carrier means is coupled to said memory structure, opposite said substrate thickness which thus functions as a protective cap.
Claim 7
Dependent Claim
26 words
The invention of claim 2 wherein the substrate polymer thickness is fashioned from a relatively thin, flat, flexible polymeric web, being cut-out therefrom in disk configuration.
Claim 8
Dependent Claim
43 words
The invention of claim 2 wherein rigid carrier means is coupled to said memory structure, opposite said substrate thickness which thus functions as a protective cap; and wherein, on the opposite side of this carrier means, is attached a second identical memory unit.
Claim 9
Dependent Claim
53 words
A dual recording disk responsive to a write-radiation beam of prescribed energy and wavelength, this disk comprising:. A pair of sealed memory units, each unit comprising a clear substrate thickness transparent to said radiation beam and a radiation-memory structure overlaid on this. substrate thickness, the units being coupled back-to-back at the memory structure.
Claim 10
Dependent Claim
53 words
A dual recording disk responsive to a write-radiation beam of prescribed energy and wavelength, this disk comprising:. A pair of sealed memory units, each unit comprising a clear substrate thickness transparent to said radiation beam and a radiation-memory structure overlaid on this. substrate thickness, the units being coupled back-to-back at the memory structure.
Claim 11
Dependent Claim
39 words
The invention of claim 8 wherein each memory structure comprises a non-ablative island-absorber-film deposited on a surface of the polymer substrate plus an anti-reflective thickness overlaid on this absorber film, this polymer surface being adapted to enhance island deposition;
Claim 12
Dependent Claim
23 words
The invention of claim 9 wherein each anti-reflective thickness comprises a polymeric optical spacer, with a common reflector film coupled between the units.
Claim 13
Independent Claim
40 words
A method of fabricating a recording disk responsive to a write-radiation beam of prescribed . energy and wavelength, this method comprising: Selecting a clear substrate thickness transparent to said radiation beam; and depositing a radiation-memory structure on this substrate thickness.
Claim 14
Independent Claim
40 words
A method of fabricating a recording disk responsive to a write-radiation beam of prescribed . energy and wavelength, this method comprising: Selecting a clear substrate thickness transparent to said radiation beam; and depositing a radiation-memory structure on this substrate thickness.
Claim 15
Dependent Claim
18 words
The invention of claim 11 wherein the substrate thickness is selected to comprise a defocusing-thickness of clear polymer.
Claim 16
Dependent Claim
42 words
The invention of claim 12 wherein the memory structure is deposited as a non-ablative island-absorber-film deposited on a nucleating surface of the polymer substrate, with an anti-reflective thickness overlaid on this absorber film, this polymer surface being adapted to enhance island deposition.
Claim 17
Dependent Claim
21 words
The invention of claim 13 wherein the anti-reflective thickness is fashioned to comprise a polymeric optical spacer and a reflector film.
Claim 18
Dependent Claim
26 words
The invention of claim 12 wherein rigid carrier means is coupled to said memory structure, opposite said substrate thickness which thus functions as a protective cap.
Claim 19
Dependent Claim
26 words
The invention of claim 12 wherein the substrate polymer thickness is fashioned from a relatively thin, flat, flexible polymeric web, being cut-out therefrom in disk configuration.
Claim 20
Dependent Claim
23 words
.17. The invention of claim 5 wherein the carrier means comprises an aluminum disk and the absorber film is comprised of gold islands.
References Cited (Backward Citations)
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