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. 24, 2006
Filed:
Nov. 10, 2003
Seigo Kishino, Kobe, JP;
Hideki Tsuya, Yokohama, JP;
Seigo Kishino, Kobe, JP;
Hideki Tsuya, Yokohama, JP;
Hyogo Prefecture, Kobe, JP;
Japan Society for the Promotion of Science, Tokyo, JP;
Abstract
On a silicon layer of an SOI wafer is defined a semiconductor device-forming region to form semiconductor devices thereon and an insulating region to electrically insulate the semiconductor device-forming region. Then, a mask layer is formed of nitride by means of photolithography so as to cover the semiconductor device-forming region. Then, an impurities-removing layer is formed by means of well known technique so as to cover the mask layer and embed the gaps between the adjacent masks of the mask layer. The impurities of the silicon layer of the SOI wafer are absorbed and removed by the distorted layer, the grain boundaries and the lattice defects of the impurities-removing layer.