The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1999
Filed:
May. 20, 1997
Applicant:
Inventor:
Gerald H Negley, Hillsborough, NC (US);
Assignee:
Cree Research, Inc., Durham, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257 95 ; 257 76 ; 257 77 ; 257103 ;
Abstract
Light emitting diodes are disclosed which have increased external efficiency and are formed from silicon carbide substrates. Diodes are produced by a method which includes directing a beam of laser light at one surface of a portion of silicon carbide, and which the laser light is sufficient to vaporize the silicon carbide that it strikes to thereby define a cut in the silicon carbide portion; and then dry etching the silicon carbide portion to remove by-products generated when the laser light cuts the silicon carbide portion. The resulting diode structure includes reticulate patterned sidewalls that promote increased light emission efficiency.
Published as:
WO9611504A1; AU3761295A; US5631190A; EP0786150A1; CN1163014A; KR970706617A; EP0786150B1; ATE174724T1; DE69506734D1; JPH11505666A; US5912477A; DE69506734T2; CN1092404C; KR100369751B1;