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. 09, 2009
Filed:
Aug. 30, 2005
Hirobumi Tanaka, Tokyo, JP;
Katsuhiko Igarashi, Tokyo, JP;
Hirobumi Tanaka, Tokyo, JP;
Katsuhiko Igarashi, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A glass composition for a thick-film resistor including at least one oxide selected from CaO, SrO, and BaO in an amount of 13 mol % to 45 mol %, BOin 0 to 40 mol % (however, not including 0), SiOin 17 mol % to 72 mol % (however, not including 72 mol %), ZrOin 0 to 10 mol % (however, not including 0), and at least one oxide selected from TaOand NbOin 0 to 10 mol % (however, not including 0), a thick-film resistor paste obtained by mixing this glass composition with a conductive material and organic vehicle, a thick-film resistor obtained by printing and firing this paste and thereby being lead-free, superior in TCR and STOL, and high in resistance, and an electronic device having this thick-film resistor.