Patent US5475237A successfully refreshed from Google Patents.
US5475237A
Expired / Lapsed
US
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Light emitting device having first and second cladding layers with an active layer and carrier blocking layer therebetween
Assignee: Sony Corp
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Filing: 1995-02-28
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Granted: 1995-12-12
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Expires: 2015-02-28
Abstract
Abstract A light emitting device is formed of a substrate, a first cladding layer on the substrate, an active layer on the first cladding layer, and a second cladding layer on the active layer. A carrier blocking layer also serving as an etching stopping layer during formation of the second cladding layer is provided between the active layer and the second cladding layer. Both sides of the second cladding layer are filled by a semiconductor layer having a resistance substantially higher than the other layers which the filler layer is in contact with. The first and second cladding layers, active layer, carrier blocking layer, and semiconductor layer of higher resistance comprise a II-VI compound semiconductor.
Inventors
- 👤 Fumiyo Narui
- 👤 Masafumi Ozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:11
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/822; H10H20/823; H01; H01S; H01S5/00; H01S5/30; H01S5/32; H01S5/327; H10H20/01; H10H20/011; H10H20/012; H10H20/0125; H10P; H10P50/00; H10P50/20; H10P52/00; H10P95/00; H10P95/70; H01S5/10; H01S5/12; H01S5/1231; H01S5/20; H01S5/2054; H01S5/2081; H01S5/209; H01S5/22; H01S5/223; H01S5/2231; Y; Y10; Y10S; Y10S438/00; Y10S438/97
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A light emitting device, comprising: a substrate; a first cladding layer on said substrate; an active layer on said first cladding layer; a second cladding layer on said active layer; a carrier blocking layer for carrier confinement and also serving as an etching stopping layer during formation of said second cladding layer between said active layer and said second cladding layer; both sides of said second cladding layer being filled by a semiconductor filler layer having a resistance substantially higher than other layers which the filler layer is in contact with; and said first and second cladding layers, active layer, carrier blocking layer, and semiconductor filler layer comprising a II-VI compound semiconductor.
Claim 2
Dependent Claim
112 words
A light emitting device, comprising: a substrate; a first cladding layer on said substrate; an active layer on said first cladding layer; a second cladding layer on said active layer; a carrier blocking layer for carrier confinement and also serving as an etching stopping layer during formation of said second cladding layer between said active layer and said second cladding layer; both sides of said second cladding layer being filled by a semiconductor filler layer having a resistance substantially higher than other layers which the filler layer is in contact with; and said first and second cladding layers, active layer, carrier blocking layer, and semiconductor filler layer comprising a II-VI compound semiconductor.
Claim 3
Dependent Claim
17 words
A light emitting device according to claim 1 wherein said first and second cladding layers comprise ZnMgSSe.
Claim 4
Dependent Claim
15 words
A light emitting device according to claim 1 wherein said carrier blocking layer comprises ZnMgSSe.
Claim 5
Dependent Claim
14 words
A light emitting device according to claim 1 wherein said filler layer comprises ZnSe.
Claim 6
Dependent Claim
106 words
A light emitting device, comprising: a substrate; a n-ZnMgSSe cladding layer on said substrate; an active layer comprising a compound selected from the group consisting of ZnSe and ZnSSe on said n-ZnMgSSe cladding layer; a p-ZnMgSSe cladding layer on said active layer; a p-ZnMgSSe carrier blocking layer for carrier confinement and also serving as an etching stopping layer during formation of said second cladding layer between said active layer and said second cladding layer; and both sides of said p-ZnMgSSe cladding layer being filled by a ZnSe filler layer having a resistance substantially higher than the other layers which the filler layer is in contact with.
Claim 7
Dependent Claim
106 words
A light emitting device, comprising: a substrate; a n-ZnMgSSe cladding layer on said substrate; an active layer comprising a compound selected from the group consisting of ZnSe and ZnSSe on said n-ZnMgSSe cladding layer; a p-ZnMgSSe cladding layer on said active layer; a p-ZnMgSSe carrier blocking layer for carrier confinement and also serving as an etching stopping layer during formation of said second cladding layer between said active layer and said second cladding layer; and both sides of said p-ZnMgSSe cladding layer being filled by a ZnSe filler layer having a resistance substantially higher than the other layers which the filler layer is in contact with.
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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) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |