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. 26, 2009
Filed:
Dec. 24, 2003
Ryouichi Takayama, Hirakata, JP;
Hidekazu Nakanishi, Neyagawa, JP;
Takashi Inoue, Suita, JP;
Tetsuo Kawasaki, Katano, JP;
Kouji Hasegawa, Muroran, JP;
Yukio Iwasaki, Tadaoka-cho, JP;
Ryouichi Takayama, Hirakata, JP;
Hidekazu Nakanishi, Neyagawa, JP;
Takashi Inoue, Suita, JP;
Tetsuo Kawasaki, Katano, JP;
Kouji Hasegawa, Muroran, JP;
Yukio Iwasaki, Tadaoka-cho, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An electronic part, object of which is to improve temperature characteristics and electrical properties, includes a substrate (), a comb-type electrode () that is disposed on the upper surface of the substrate (), and a protective film () that covers the comb-type electrode () and has an uneven shape at its top surface. If the pitch width of one pitch in the uneven shape of the protective film () is L, the width of one pitch of a convex portion () of the unevenness in the uneven shape of the protective film () is L, the width of one pitch of a concave portion () thereof is Lthe pitch width of one pitch of the comb-type electrode () is p, the width of one of electrode fingers which form the comb-type electrode () is pand the width between the electrode fingers is pthen each parameter is set so that the following expressions are satisfied, L≦pand L≧p(herein, the correlations of L≈p, ppp and LLL are satisfied).