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. 19, 2009
Filed:
May. 01, 2007
Applicant:
Kazuaki Kojima, Nagano, JP;
Inventor:
Kazuaki Kojima, Nagano, JP;
Assignee:
Olympus Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor device includes a semiconductor chip having at least an electrode pad and a device formed on a semiconductor layer on its surface, a seal cap having a recess portion facing the device which is adhered to the surface of the semiconductor chip, and a cavity as an airspace formed by the recess portion between the semiconductor chip and the seal cap. The semiconductor chip includes a stepped portion at a portion of the back surface opposite the surface to have an uneven thickness.