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:
Apr. 28, 2009
Filed:
Sep. 28, 2007
Applicant:
Sang Wook Ryu, Cheongjoo-si, KR;
Inventor:
Sang Wook Ryu, Cheongjoo-si, KR;
Assignee:
Dongbu Hitek Co., Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/44 (2006.01); H01L 21/4763 (2006.01); H01L 21/76 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods for forming a contact hole in a semiconductor device are provided. An exposed portion of an isolation layer, which may be generated during a process of forming a borderless contact hole, can be covered with a material similar to that of the substrate.