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:
Aug. 12, 2003
Filed:
Apr. 26, 2000
Applicant:
Inventors:
Kazuaki Ohmi, Yokohama, JP;
Katsumi Nakagawa, Atsugi, JP;
Nobuhiko Sato, Sagamihara, JP;
Kiyofumi Sakaguchi, Yokohama, JP;
Kazutaka Yanagita, Yokohama, JP;
Takao Yonehara, Atsugi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/146 ;
U.S. Cl.
CPC ...
H01L 2/146 ;
Abstract
To cause a crack at a fixed position in a separation layer, a method of separating a composite member includes the steps of forming a separation layer inside a composite member, forming inside the separation layer a stress riser layer in which an in-plane stress has concentratedly been produced to an extent that does not cause separation by the in-plane stress, and enlarging the in-plane stress to cause a crack in the stress riser layer, thereby separating the composite member.