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:
Oct. 18, 2016
Filed:
Apr. 29, 2015
Applicant:
Ngk Insulators, Ltd., Aichi-prefecture, JP;
Inventors:
Assignee:
NGK INSULATORS, LTD., Aichi-Prefecture, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 27/12 (2006.01); C04B 35/44 (2006.01); B32B 18/00 (2006.01);
U.S. Cl.
CPC ...
C04B 35/44 (2013.01); B32B 18/00 (2013.01); H01L 27/1203 (2013.01); B32B 2250/02 (2013.01); B32B 2305/026 (2013.01); B32B 2457/14 (2013.01);
Abstract
A handle substrateis made of a translucent ceramics. An average density of pores having a size of 0.5 to 3.0 μm included in a surface regionA on the side of a bonding faceof the handle substrateis 50 counts/mmor smaller. It is formed a region, whose average density of pores having a size of 0.5 to 3.0 μm is 100 counts/mmor larger, in the handle substrate. The translucent ceramics has an average grain size of 5 to 60 μm.