US5795798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making full color monolithic gan based leds
Assignee: University of California
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Filing: 1996-11-27
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Granted: 1998-08-18
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Expires: 2016-11-27
Abstract
Abstract A method and apparatus for producing full-color luminescent monolithic semiconductor devices. Each portion of the device is bandgap engineered by using different dopants to change the direct bandgap of selected areas of each region, thereby allowing that region to produce different wavelengths of emitted light at high efficiencies.
Inventors
- 👤 Umesh Kumar Mishra
- 👤 Steven P. DenBaars
- 👤 David Joseph Kapolnek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:46
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/822; H10H20/824; H10H20/825; H10H20/8252; H10H20/01; H10H20/011; H10H20/013; H10H20/0133; H10H20/01335; H10H29/00; H10H29/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
47 words
A method of producing a white light source, comprising the steps of: growing a nucleation layer on a substrate; depositing a mask on the nucleation layer, the mask containing apertures; depositing at least one conductive doped layer within the apertures of the mask; and removing the mask.
Claim 2
Independent Claim
47 words
A method of producing a white light source, comprising the steps of: growing a nucleation layer on a substrate; depositing a mask on the nucleation layer, the mask containing apertures; depositing at least one conductive doped layer within the apertures of the mask; and removing the mask.
Claim 3
Dependent Claim
10 words
The method of claim 1, wherein the substrate is sapphire.
Claim 4
Dependent Claim
20 words
The method of claim 1, wherein the apertures are scaled based on a targeted alloy composition of the doped layer.
Claim 5
Dependent Claim
31 words
The method of claim 1, wherein the doped layer contains a first dopant within a first aperture of the mask and a second dopant within a second aperture of the mask.
References Cited (Backward Citations)
US3864592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-17 | 2002-02-16 | 2002-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-17 | 2006-02-16 | 2006-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-17 | 2010-02-16 | 2010-08-18 | $7700.00 | Window Closed / Lapsed |