Source: http://www.google.com/patents/US8174024?dq=60/310,746
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Patent US8174024 - Gallium nitride device with a diamond layer - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn one aspect, a device includes a gallium nitride (GaN) layer, a first diamond layer disposed on the GaN layer, a gate structure disposed in contact with the GaN layer and the first diamond layer, and a second diamond layer having a first thermal conductivity and disposed on a second surface of the...http://www.google.com/patents/US8174024?utm_source=gb-gplus-sharePatent US8174024 - Gallium nitride device with a diamond layerAdvanced Patent SearchPublication numberUS8174024 B2Publication typeGrantApplication numberUS 13/157,653Publication dateMay 8, 2012Filing dateJun 10, 2011Priority dateDec 22, 2008Also published asUS7989261, US20100155900, US20110241018, WO2010075125A1Publication number13157653, 157653, US 8174024 B2, US 8174024B2, US-B2-8174024, US8174024 B2, US8174024B2InventorsRalph Korenstein, Steven D. Bernstein, Stephen J. PereiraOriginal AssigneeRaytheon CompanyExport CitationBiBTeX, EndNote, RefManPatent Citations (31), Non-Patent Citations (23), Referenced by (2), Classifications (22), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetGallium nitride device with a diamond layerUS 8174024 B2Abstract In one aspect, a device includes a gallium nitride (GaN) layer, a first diamond layer disposed on the GaN layer, a gate structure disposed in contact with the GaN layer and the first diamond layer, and a second diamond layer having a first thermal conductivity and disposed on a second surface of the GaN layer. The gate and the first diamond layer are disposed on a first surface of the GaN layer opposite the second surface of the GaN layer.
a first diamond layer disposed on the GaN layer;
a gate structure disposed in contact with the GaN layer and the first diamond layer; and
a second diamond layer having a first thermal conductivity and disposed on a second surface, of the GaN layer,
wherein the gate and the first diamond layer are disposed on a first surface of the GaN layer opposite the second surface of the GaN layer.
2. The device of claim 1, further comprising a third diamond layer having a second thermal conductivity greater than the first thermal conductivity and disposed on the second diamond layer.
3. The device of claim 1, further comprising an interlayer disposed between the second diamond layer and the GaN layer.
4. The device of claim 1 wherein the second diamond layer is greater than 2 mils and the first diamond layer less than 1 mil.
6. The device of claim 1 wherein the GaN layer comprises at least one of undoped GaN, doped GaN or GaN combined with another element.
a second diamond layer having a first thermal conductivity and disposed on a second surface of the GaN layer; and
an interlayer disposed between the second diamond layer and the GaN layer,
wherein the gate and the first diamond layer are disposed on a first surface of the GaN layer opposite the second surface of the GaN layer,
wherein the GaN layer comprises at least one of undoped GaN, doped GaN or GaN combined with another element.
8. The device of claim 7, further comprising a third diamond layer having a second thermal conductivity greater than the first thermal conductivity and disposed on the second diamond layer.
9. The device of claim 7 wherein the second diamond layer is greater than 2 mils and the first diamond layer less than 1 mil.
10. The device of claim 7 wherein the device is one of a high frequency device, a high electron mobility transistor (HEMT) or a microwave device.
CROSS REFERENCE TO RELATED APPLICATIONS The present application is a divisional application of and claims priority to U.S. patent application Ser. No. 12/341,115, filed on Dec. 22, 2008, entitled �FABRICATING A GALLIUM NITRIDE DEVICE WITH A DIAMOND LAYER,� which is incorporated herein by reference in its entirety.
SUMMARY In one aspect, a method includes fabricating a device. The device includes a gallium nitride (GaN) layer, a diamond layer disposed on the GaN layer and a gate structure disposed in contact with the GaN layer and the diamond layer.
Referring to FIGS. 6 and 7A to 7F, a further process to fabricate a GaN layer with diamond layers is a process 300. Process 300 is similar to process 200 except a third diamond layer 316 is disposed on a first GaN surface 302 (e.g., a top surface) (FIG. 7F) opposite a second GaN surface 304 (e.g., a bottom surface) (FIG. 7F) that has the first and second diamond-layers 14, 12. For example, processing blocks 202, 204 and 208 are performed as in process 200. In particular, the GaN 16 is grown on the first substrate 230 (202) (FIG. 7A), the silicon layer 232 is disposed onto the GaN 16 (204) (FIG. 7B); and the first substrate 230 is removed (208), for example, through etching leaving the GaN/silicon structure 250 (FIG. 7C).
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No. 12/753,354, filed Apr. 2, 2010, file through Jun. 8, 2011, Part 4, 336 pages.23Written Opinion of the International Searching Authority, PCT/US2010/024878 dated Jun. 7, 2010, 6 pages.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8652615 *Jul 9, 2012Feb 18, 2014Wisys Technology FoundationNanowire and microwire fabrication technique and productUS20120279852 *Jul 9, 2012Nov 8, 2012Michael ZachNanowire and Microwire Fabrication Technique and Product* Cited by examinerClassifications U.S. Classification257/77, 257/613, 257/40, 257/78, 257/192International ClassificationH01L31/0312Cooperative ClassificationH01L29/267, H01L29/66462, H01L29/66431, H01L29/1602, H01L21/02527, H01L21/0262, H01L29/7786, H01L21/02389European ClassificationH01L29/778E, H01L21/02K4C1A1, H01L29/66M6T6C, H01L29/66M6T6E3, H01L21/02K4A1B1, H01L21/02K4E3C, H01L29/267, H01L29/16DLegal EventsDateCodeEventDescriptionJun 13, 2011ASAssignmentOwner name: RAYTHEON COMPANY, MASSACHUSETTSFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KORENSTEIN, RALPH;BERNSTEIN, STEVEN D.;PEREIRA, STEPHEN J.;SIGNING DATES FROM 20081219 TO 20090112;REEL/FRAME:026430/0147RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google