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. 30, 1999
Filed:
Apr. 24, 1998
Shigeo Sasaki, Chigasaki, JP;
Shinya Takyu, Saitama-ken, JP;
Keisuke Tokubuchi, Yokohama, JP;
Koichi Yazima, Chigasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
Grooves are formed in a surface of a wafer, on which surface semiconductor elements are formed, along dicing lines. The grooves are deeper than a thickness of a finished chip. A holding member is attached on the surface of the wafer on which the semiconductor elements are formed. A bottom surface of the wafer is lapped and polished to the thickness of the finished chip, thereby dividing the wafer into chips. When the wafer is divided into the chips, the lapping and polishing is continued until the thickness of the wafer becomes equal to the thickness of the finished chip, even after the wafer has been divided into the chips by the lapping and polishing.