Assignee
CREE RESEARCH INC
US·47 granted patents·14,752 citations·filing 1988–1999
Top patents by PatentIndex Score
47 records- 0199US5912477AHigh efficiency light emitting diodesCREE RESEARCH INC·Filed 1997·Granted Jun 15, 1999·663 cites·17 claims
- 0299US5739554ADouble heterojunction light emitting diode with gallium nitride active layerCREE RESEARCH INC·Filed 1995·Granted Apr 14, 1998·848 cites·42 claims
- 0399US5631190AMethod for producing high efficiency light-emitting diodes and resulting diode structuresCREE RESEARCH INC·Filed 1994·Granted May 20, 1997·681 cites·30 claims
- 0499US5416342ABlue light-emitting diode with high external quantum efficiencyCREE RESEARCH INC·Filed 1993·Granted May 16, 1995·533 cites·53 claims
- 0599US5210051AHigh efficiency light emitting diodes from bipolar gallium nitrideCREE RESEARCH INC·Filed 1991·Granted May 11, 1993·888 cites·15 claims
- 0699US5200022AMethod of improving mechanically prepared substrate surfaces of alpha silicon carbide for deposition of beta silicon carbide thereon and resulting productCREE RESEARCH INC·Filed 1990·Granted Apr 6, 1993·702 cites·4 claims
- 0799US5027168ABlue light emitting diode formed in silicon carbideCREE RESEARCH INC·Filed 1989·Granted Jun 25, 1991·588 cites·65 claims
- 0899US4966862AMethod of production of light emitting diodesCREE RESEARCH INC·Filed 1989·Granted Oct 30, 1990·644 cites·16 claims
- 0999US4946547AMethod of preparing silicon carbide surfaces for crystal growthCREE RESEARCH INC·Filed 1989·Granted Aug 7, 1990·750 cites·25 claims
- 1099US4918497ABlue light emitting diode formed in silicon carbideCREE RESEARCH INC·Filed 1988·Granted Apr 17, 1990·717 cites·64 claims
- 1198US5812105ALed dot matrix drive method and apparatusCREE RESEARCH INC·Filed 1996·Granted Sep 22, 1998·326 cites·8 claims
- 1298US5719409ASilicon carbide metal-insulator semiconductor field effect transistorCREE RESEARCH INC·Filed 1996·Granted Feb 17, 1998·291 cites·13 claims
- 1398US5604135AMethod of forming green light emitting diode in silicon carbideCREE RESEARCH INC·Filed 1994·Granted Feb 18, 1997·417 cites·17 claims
- 1498US5523589AVertical geometry light emitting diode with group III nitride active layer and extended lifetimeCREE RESEARCH INC·Filed 1994·Granted Jun 4, 1996·1.1k cites·36 claims
- 1598US5506421APower MOSFET in silicon carbideCREE RESEARCH INC·Filed 1992·Granted Apr 9, 1996·299 cites·19 claims
- 1698US5338944ABlue light-emitting diode with degenerate junction structureCREE RESEARCH INC·Filed 1993·Granted Aug 16, 1994·475 cites·47 claims
- 1798US5270554AHigh power high frequency metal-semiconductor field-effect transistor formed in silicon carbideCREE RESEARCH INC·Filed 1991·Granted Dec 14, 1993·210 cites·67 claims
- 1897US5972801AProcess for reducing defects in oxide layers on silicon carbideCREE RESEARCH INC·Filed 1995·Granted Oct 26, 1999·195 cites·34 claims
- 1997US5592501ALow-strain laser structures with group III nitride active layersCREE RESEARCH INC·Filed 1994·Granted Jan 7, 1997·281 cites·35 claims
- 2097US5393993ABuffer structure between silicon carbide and gallium nitride and resulting semiconductor devicesCREE RESEARCH INC·Filed 1993·Granted Feb 28, 1995·977 cites·27 claims
- 2197US5119540AApparatus for eliminating residual nitrogen contamination in epitaxial layers of silicon carbide and resulting productCREE RESEARCH INC·Filed 1990·Granted Jun 9, 1992·138 cites·14 claims
- 2296US5539217ASilicon carbide thyristorCREE RESEARCH INC·Filed 1993·Granted Jul 23, 1996·147 cites·18 claims
- 2396US5465249ANonvolatile random access memory device having transistor and capacitor made in silicon carbide substrateCREE RESEARCH INC·Filed 1991·Granted Nov 7, 1995·151 cites·35 claims
- 2496US5264713AJunction field-effect transistor formed in silicon carbideCREE RESEARCH INC·Filed 1991·Granted Nov 23, 1993·152 cites·30 claims
- 2595US5831288ASilicon carbide metal-insulator semiconductor field effect transistorCREE RESEARCH INC·Filed 1997·Granted Nov 3, 1998·123 cites·13 claims
- 2695US5718760AGrowth of colorless silicon carbide crystalsCREE RESEARCH INC·Filed 1996·Granted Feb 17, 1998·113 cites·11 claims
- 2794US5686737ASelf-aligned field-effect transistor for high frequency applicationsCREE RESEARCH INC·Filed 1994·Granted Nov 11, 1997·124 cites·16 claims
- 2893US5724062AHigh resolution, high brightness light emitting diode display and method and producing the sameCREE RESEARCH INC·Filed 1994·Granted Mar 3, 1998·434 cites·17 claims
- 2993US5679153AMethod for reducing micropipe formation in the epitaxial growth of silicon carbide and resulting silicon carbide structuresCREE RESEARCH INC·Filed 1994·Granted Oct 21, 1997·148 cites·32 claims
- 3093US5629531AMethod of obtaining high quality silicon dioxide passivation on silicon carbide and resulting passivated structuresCREE RESEARCH INC·Filed 1994·Granted May 13, 1997·82 cites·3 claims
- 3193US5409859AMethod of forming platinum ohmic contact to p-type silicon carbideCREE RESEARCH INC·Filed 1994·Granted Apr 25, 1995·105 cites·24 claims
- 3293US5359345AShuttered and cycled light emitting diode display and method of producing the sameCREE RESEARCH INC·Filed 1992·Granted Oct 25, 1994·469 cites·9 claims
- 3392US6121633ALatch-up free power MOS-bipolar transistorCREE RESEARCH INC·Filed 1998·Granted Sep 19, 2000·100 cites·21 claims
- 3492US5838706ALow-strain laser structures with group III nitride active layersCREE RESEARCH INC·Filed 1996·Granted Nov 17, 1998·171 cites·4 claims
- 3591US5969378ALatch-up free power UMOS-bipolar transistorCREE RESEARCH INC·Filed 1997·Granted Oct 19, 1999·93 cites·30 claims
- 3690US6107142ASelf-aligned methods of fabricating silicon carbide power devices by implantation and lateral diffusionCREE RESEARCH INC·Filed 1998·Granted Aug 22, 2000·109 cites·46 claims
- 3790US5776837AMethod of obtaining high quality silicon dioxide passivation on silicon carbide and resulting passivated structuresCREE RESEARCH INC·Filed 1996·Granted Jul 7, 1998·66 cites·5 claims
- 3889US6218254B1Method of fabricating a self-aligned bipolar junction transistor in silicon carbide and resulting devicesCREE RESEARCH INC·Filed 1999·Granted Apr 17, 2001·76 cites·20 claims
- 3988US5459107AMethod of obtaining high quality silicon dioxide passivation on silicon carbide and resulting passivated structuresCREE RESEARCH INC·Filed 1992·Granted Oct 17, 1995·69 cites·3 claims
- 4088US5155062AMethod for silicon carbide chemical vapor deposition using levitated wafer systemCREE RESEARCH INC·Filed 1990·Granted Oct 13, 1992·59 cites·13 claims
- 4186US6025289AColorless silicon carbide crystalsCREE RESEARCH INC·Filed 1997·Granted Feb 15, 2000·41 cites·10 claims
- 4284US5061972AFast recovery high temperature rectifying diode formed in silicon carbideCREE RESEARCH INC·Filed 1990·Granted Oct 29, 1991·60 cites·39 claims
- 4383US5381103ASystem and method for accelerated degradation testing of semiconductor devicesCREE RESEARCH INC·Filed 1992·Granted Jan 10, 1995·57 cites·39 claims
- 4481US6281521B1Silicon carbide horizontal channel buffered gate semiconductor devicesCREE RESEARCH INC·Filed 1998·Granted Aug 28, 2001·46 cites·33 claims
- 4568US5612260AMethod of obtaining high quality silicon dioxide passivation on silicon carbide and resulting passivated structuresCREE RESEARCH INC·Filed 1994·Granted Mar 18, 1997·20 cites·10 claims
- 4667US5923946ARecovery of surface-ready silicon carbide substratesCREE RESEARCH INC·Filed 1997·Granted Jul 13, 1999·38 cites·22 claims
- 4759US6011279ASilicon carbide field controlled bipolar switchCREE RESEARCH INC·Filed 1997·Granted Jan 4, 2000·18 cites·64 claims
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