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:
Sep. 07, 2004
Filed:
Apr. 22, 2002
Applicant:
Inventors:
Assignee:
Shin-Etsu Handotai Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/358 ;
U.S. Cl.
CPC ...
H01L 2/358 ;
Abstract
In order to improve the productivity or production yield of chips in the process for device fabrication, the present invention provides a wafer or an apparatus of process for fabricating semiconductor devices having the backside of the wafer or the surface of a wafer holding means adjusted so as to have a distribution in contact surface density between the surface of the wafer holding means and the backside of the wafer when the semiconductor wafer is held on the wafer holding means in the process for fabricating devices.