Patent US5597740A successfully refreshed from Google Patents.
US5597740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor display device and a method of fabricating the same
Assignee: Sony Corp
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Filing: 1995-07-05
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Granted: 1997-01-28
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Expires: 2015-07-05
Abstract
Abstract A light emitting device and a method of fabricating the same in which a first cladding layer is formed on a substrate, then red, green and blue light emitting portions each made of II-VI semiconductor are formed in a horizontal direction with respect to a surface of the substrate on the first cladding layer, then a second cladding layer is formed on the light emitting portions, and the red, green and blue light emitting portions are electrically separated from each other so that three primary color light emitting portions of a self luminous type are formed on the same substrate through single crystal growth process by changing composition of a compound semiconductor layer.
Inventors
- 👤 Satoshi Ito
- 👤 Futoshi Hiei
- 👤 Akira Ishibashi
- 👤 Atsushi Toda
- 👤 Norikazu Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:11
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/822; H10H20/823; H10H29/00; H10H29/10; H10H29/14; H10H29/142; Y; Y10; Y10S; Y10S438/00; Y10S438/914; Y10S438/925; Y10S438/942; Y10S438/944
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
A method for fabricating a light emitting device comprising the steps of: forming a first cladding layer on a substrate; forming red, green and blue light emitting portions each made of II-VI semiconductor in a horizontal direction with respect to a surface of said substrate on said first cladding layer; forming a second cladding layer on said light emitting portions; and electrically separating said red, green and blue light emitting portions from each other.
Claim 2
Independent Claim
74 words
A method for fabricating a light emitting device comprising the steps of: forming a first cladding layer on a substrate; forming red, green and blue light emitting portions each made of II-VI semiconductor in a horizontal direction with respect to a surface of said substrate on said first cladding layer; forming a second cladding layer on said light emitting portions; and electrically separating said red, green and blue light emitting portions from each other.
Claim 3
Dependent Claim
31 words
A method for fabricating a light emitting device according to claim 1, wherein said red, green and blue light emitting portions are made by modifying the composition of Zn and Cd.
Claim 4
Dependent Claim
30 words
A method for fabricating a light emitting device according to claim 2, wherein said composition of Zn and Cd is modified by means of a mask provided above said substrate.
Claim 5
Dependent Claim
54 words
A method for fabricating a light emitting device according to claim 2, wherein a light shield structure is provided on said substrate and beams emitted from Zn and Cd material supply sources are irradiated onto said substrate obliquely with respect thereto to modify the compositions of Zn and Mg in said light emitting portions.
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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) | 2000-01-28 | 2000-07-29 | 2001-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-28 | 2004-07-29 | 2005-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-28 | 2008-07-29 | 2009-01-28 | $7700.00 | Window Closed / Lapsed |