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:
May. 02, 2000
Filed:
Apr. 29, 1998
Applicant:
Inventors:
Kurt W Eisenbeiser, Tempe, AZ (US);
Yang Wang, Phoenix, AZ (US);
Jenn-Hwa Huang, Gilbert, AZ (US);
Vijay K Nair, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257194 ; 257655 ;
Abstract
A semiconductor device includes a buffer layer (23) having a doped region (24), a barrier layer (26) over the buffer layer (23) and having a doped region (27), and a channel layer (25) located between the buffer layer (23) and the barrier layer (26) where the doping density of the doped region (27) in the barrier layer (26) is higher than the doping densities of the channel layer (25) and the doped region (24) in the first buffer layer (23).