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:
Jun. 19, 2007
Filed:
Apr. 23, 2004
Applicants:
Atsushi Nishimura, Osaka, JP;
Toru Hinomura, Osaka, JP;
Atsushi Ikeda, Niigata, JP;
Takenobu Kishida, Osaka, JP;
Inventors:
Atsushi Nishimura, Osaka, JP;
Toru Hinomura, Osaka, JP;
Atsushi Ikeda, Niigata, JP;
Takenobu Kishida, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 23/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
After forming a hole in an insulating film, a first tungsten film is formed over the wall and bottom surfaces of the hole. Then, a second tungsten film is formed by using the first tungsten film as a seed layer to fill up the hole. When the first tungsten film is formed, the average value of the diameters of crystal grains of the portion of the first tungsten film which is formed on the bottom surface of the hole is suppressed to 30 nm or less.