Patent US4990970A successfully refreshed from Google Patents.
US4990970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light emitting semiconductor having a rear reflecting surface
Assignee: Motors Liquidation Co
•
Filing: 1990-03-23
•
Granted: 1991-02-05
•
Expires: 2010-03-23
Abstract
Abstract A light emitting semiconducting structure is formed over a light reflecting surface using epitaxial growth techniques. The light reflecting surface is provided by an appropriate metal layer intermediately disposed between two dielectric layers, this multi-layer structure is disposed intermediate between an underlying substrate and the overlaying light emitting semiconducting components. The light reflecting surface provides enhanced photon reflectance for the light emitting device. The active region of the light emitting device is formed using epitaxial growth techniques.
Inventors
- 👤 Brian K. Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:01
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/814; H10H20/01; H10H20/011; H10H20/013; H10H20/0133; H10H20/01335
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A light emitting semiconducting structure comprising: a substrate of appropriate material, conductivity, and cystallographic orientation; patterned regions of a reflecting structure, said reflecting structure comprising a metal reflecting layer intermediately disposed between two dielectric layers; epitaxially grown material from said substrate, said epitaxially grown material being provided continuously in at least one channel which contacts said substrate and laterally over said reflecting structure to form an active region; and appropriate electrical contacts sufficient to provide a light emitting semiconductive structure overlaying said epitaxially grown active region.
Claim 2
Dependent Claim
86 words
A light emitting semiconducting structure comprising: a substrate of appropriate material, conductivity, and cystallographic orientation; patterned regions of a reflecting structure, said reflecting structure comprising a metal reflecting layer intermediately disposed between two dielectric layers; epitaxially grown material from said substrate, said epitaxially grown material being provided continuously in at least one channel which contacts said substrate and laterally over said reflecting structure to form an active region; and appropriate electrical contacts sufficient to provide a light emitting semiconductive structure overlaying said epitaxially grown active region.
Claim 3
Dependent Claim
119 words
A light emitting semiconducting structure comprising: a substrate of gallium arsenide characterized by an n-type conductivity; patterned regions of a reflecting structure, said reflecting structure comprising a gold or similar metal reflecting layer intermediately disposed between two masking layers preferably of aluminum oxide; epitaxially grown material from the group consisting of boron, aluminum, indium, gallium, arsenic, phosphorus, nitrogen in the III-V family of light emitting compounds, and other III-VI, IV, and IV-VI light emitters, or gallium and arsenide, provided continuously in at least one channel which contacts said substrate and laterally over said reflecting structure to from an active region; and appropriate p-type electrical contacts sufficient to provide the light emitting semiconductive structure overlaying said laterally grown active region.
Claim 4
Dependent Claim
119 words
A light emitting semiconducting structure comprising: a substrate of gallium arsenide characterized by an n-type conductivity; patterned regions of a reflecting structure, said reflecting structure comprising a gold or similar metal reflecting layer intermediately disposed between two masking layers preferably of aluminum oxide; epitaxially grown material from the group consisting of boron, aluminum, indium, gallium, arsenic, phosphorus, nitrogen in the III-V family of light emitting compounds, and other III-VI, IV, and IV-VI light emitters, or gallium and arsenide, provided continuously in at least one channel which contacts said substrate and laterally over said reflecting structure to from an active region; and appropriate p-type electrical contacts sufficient to provide the light emitting semiconductive structure overlaying said laterally grown active region.
Claim 5
Dependent Claim
27 words
A light emitting semiconducting structure as recited in claim 1 wherein said substrate is characterized by p-type conductivity and said electrical contacts are characterized by n-type conductivity.
References Cited (Backward Citations)
US4727047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |