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:
Mar. 24, 2009
Filed:
Apr. 20, 2006
Applicants:
Seiji Sarayama, Miyagi, JP;
Masahiko Shimada, Miyagi, JP;
Hisanori Yamane, Miyagi, JP;
Hirokazu Iwata, Miyagi, JP;
Inventors:
Seiji Sarayama, Miyagi, JP;
Masahiko Shimada, Miyagi, JP;
Hisanori Yamane, Miyagi, JP;
Hirokazu Iwata, Miyagi, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 27/15 (2006.01); H01L 29/167 (2006.01); H01L 33/00 (2006.01); C01B 21/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A crystal has a diameter of 1 cm or more and shows a strongest peak in cathode luminescent spectrum at a wavelength of 360 nm in correspondence to a band edge.