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:
Jan. 13, 2009
Filed:
Sep. 26, 2006
Tadashi Endo, Tokyo, JP;
Hiroshi Mashima, Tokyo, JP;
Tadashi Kanasaku, Ome, JP;
Tetsuya Tanaka, Hamura, JP;
Mikio Yamazoe, Nishitokyo, JP;
Tadashi Endo, Tokyo, JP;
Hiroshi Mashima, Tokyo, JP;
Tadashi Kanasaku, Ome, JP;
Tetsuya Tanaka, Hamura, JP;
Mikio Yamazoe, Nishitokyo, JP;
Shoei Chemical Inc., Shinjuku-ku, Tokyo, JP;
Abstract
A resistor composition containing: a lead-free ruthenium-based electrically conductive component, a lead-free glass having a glass basicity (Po value) of 0.4 to 0.9, and an organic vehicle; wherein, MSiAlOcrystals (M: Ba and/or Sr) are present in a thick film resistor obtained by firing this composition. The ruthenium-based resistor composition is capable of forming a lead-free thick film resistor which eliminates harmful lead components from an electrically conductive component and glass, and has superior TCR characteristics, current noise characteristics, withstand voltage characteristics and stability after a heat cycling test over a wide resistance range.