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:
Feb. 05, 2008
Filed:
Jun. 08, 2005
Christopher Harris, Taby, SE;
Thomas Gehrke, Manassas Park, VA (US);
T. Warren Weeks, Jr., Charleston, SC (US);
Cem Basceri, Reston, VA (US);
Christopher Harris, Taby, SE;
Thomas Gehrke, Manassas Park, VA (US);
T. Warren Weeks, Jr., Charleston, SC (US);
Cem Basceri, Reston, VA (US);
Cree, Inc., Durham, NC (US);
Abstract
A heterojunction device includes a first layer of p-type aluminum gallium nitride; a second layer of undoped gallium nitride on the first layer; a third layer of aluminum gallium nitride on the second layer; and an electron gas between the second and third layers. A heterojunction between the first and second layers injects positive charge into the second layer to compensate and/or neutralize negative charge within the electron gas.