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:
May. 20, 2003
Filed:
May. 18, 2001
Akira Makita, Ichigaya-Kagacho 1-Chome, Shinjuku-Ku, Tokyo 162-00, JP;
Yutaka Matsumoto, Ichigaya-Kagacho 1-Chome, Shinjuku-Ku, Tokyo 162-00, JP;
Taizo Sato, Kudamatsu Kojo, 1302, Higashi-Toyoi, Kudamatsu-shi, Yamaguchi 744-0002, JP;
Yoshikazu Watanabe, Kudamatsu Kojo, 1302, Higashi-Toyoi, Kudamatsu-shi, Yamaguchi 744-0002, JP;
Other;
Abstract
A stretched mask having a high tensile strength and favorable high-temperature creep properties and free from tape twist, and a material for the stretched mask. A low-carbon steel sheet containing 70 ppm to 170 ppm of nitrogen on a weight basis is heat-treated at a temperature at which recrystallization does not take place. The heat-treated material is provided with a resist pattern for forming apertures and subjected to etching to form apertures.