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US4774170A Expired / Lapsed US ⏱️ 0.0 years remaining

Recording elements comprising write-once thin film alloy layers

Assignee: Eastman Kodak Co
•
Filing: 1987-06-05
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Granted: 1988-09-27
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Expires: 2007-06-05
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Abstract

Abstract Optical recording and record elements are provided. The elements comprise a write-once amorphous thin-film optical recording layer of an alloy having a composition within a polygon in a ternary composition diagram of antimony, zinc, and tin; wherein (a) the composition diagram is according to FIG. 7 herein; and (b) the polygon has the following vertices and corresponding coordinates in atom percent: ______________________________________ Coordinates Vertices Sb Sn Zn ______________________________________ A 98 0 2 B 54 44 2 C 30 44 26 D 30 10 60 E 70 0 30 ______________________________________

Inventors

  • 👤 Kee-Chuan Pan
  • 👤 Yuan-Sheng Tyan
  • 👤 Donald R. Preuss

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 17:54
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24304; G11B2007/24312; G11B2007/24314; G11B7/004; G11B7/0045; G11B7/00454; G11B7/252; G11B7/253; G11B7/2531; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10S430/165

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 79 words
A recording element comprising a write-once amorphous thin-film optical recording layer of an alloy having a composition within a polygon in a ternary composition diagram of antimony, zinc, and tin; wherein (a) the composition diagram is ##STR1## and (b) the polygon has the following vertices and corresponding coordinates in atom percent: ______________________________________ Coordinates Vertices Sb Sn Zn ______________________________________ A 98 0 2 B 54 44 2 C 30 44 26 D 30 10 60 E 70 0 30 ______________________________________
Claim 2
Dependent Claim 79 words
A recording element comprising a write-once amorphous thin-film optical recording layer of an alloy having a composition within a polygon in a ternary composition diagram of antimony, zinc, and tin; wherein (a) the composition diagram is ##STR1## and (b) the polygon has the following vertices and corresponding coordinates in atom percent: ______________________________________ Coordinates Vertices Sb Sn Zn ______________________________________ A 98 0 2 B 54 44 2 C 30 44 26 D 30 10 60 E 70 0 30 ______________________________________
Claim 3
Dependent Claim 88 words
A record element comprising an optical record in a layer of an alloy having (a) a composition within a polygon in a ternary composition diagram of antimony, zinc, and tin, wherein (i) the composition diagram is ##STR2## and (ii) the polygon has the following vertices and corresponding coordinates in atom percent: ______________________________________ Coordinates Vertices Sb Sn Zn ______________________________________ A 98 0 2 B 54 44 2 C 30 44 26 D 30 10 60 E 70 0 30; and ______________________________________ (b) a pattern of amorphous and crystalline areas.
Claim 4
Dependent Claim 88 words
A record element comprising an optical record in a layer of an alloy having (a) a composition within a polygon in a ternary composition diagram of antimony, zinc, and tin, wherein (i) the composition diagram is ##STR2## and (ii) the polygon has the following vertices and corresponding coordinates in atom percent: ______________________________________ Coordinates Vertices Sb Sn Zn ______________________________________ A 98 0 2 B 54 44 2 C 30 44 26 D 30 10 60 E 70 0 30; and ______________________________________ (b) a pattern of amorphous and crystalline areas.
Claim 5
Dependent Claim 56 words
An element according to claim 1 or 2 wherein the alloy has a composition within a polygon in the ternary phase-diagram ##STR3## said composition being within the following vertices and corresponding coordinates: ______________________________________ Coordinates Vertices Sb Sn Zn ______________________________________ F 88 4 8 G 60 36 4 H 34 36 30 I 66 4 30 ______________________________________
Claim 6
Dependent Claim 20 words
The element of claim 1, 2 or 3 having an amorphous to crystalline transition temperature of at least 80° C.
Claim 7
Dependent Claim 25 words
The element of claim 1 or 2 in which the layer is capable of exhibiting only a single crystalline state having a substantially uniform composition.
Claim 8
Dependent Claim 42 words
The element of claim 1 or 2 in which the alloy has the composition Sb 65 Sn 20 Zn 15 ; Sb 60 Sn 28 Zn 12 ; Sb 60 Sn 20 Zn 20 or Sb 55 Sn 20 Zn 25 .

References Cited (Backward Citations)

US4405706A Cited
EP0184452A2 Cited
US4686543A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-09-27 1992-03-28 1992-09-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-09-27 1996-03-28 1996-09-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-09-27 2000-03-28 2000-09-27 $7700.00 Window Closed / Lapsed

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