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:
Mar. 27, 2012
Filed:
Aug. 04, 2009
Hiroyuki Sato, Tokyo, JP;
Goro Takeuchi, Tokyo, JP;
Osamu Taguchi, Tokyo, JP;
Ryuichi Tanaka, Tokyo, JP;
Hiroyuki Sato, Tokyo, JP;
Goro Takeuchi, Tokyo, JP;
Osamu Taguchi, Tokyo, JP;
Ryuichi Tanaka, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A multilayer chip varistor is provided as one capable of suppressing production of cracks and thereby preventing a connection failure between an internal electrode and a through-hole conductor. An internal electrodeis so configured as to be curved toward a direction of penetration of a through holein a connection portionthereof to a through-hole conductor. By this configuration, a region T sandwiched between a curved surfaceof the connection portionand the through-hole conductoris formed in a varistor layernear the connection portion. In this region T, a metal concentration thereof becomes higher because of diffusion of metal of the internal electrodeand the through-hole conductorinto the varistor layer, and therefore, after completion of firing, the region T has an intermediate contraction percentage between that of the internal electrodeand through-hole conductorand that of the other region of the varistor layer. This permits the region T to relax stress near the connection portionwhere the internal electrode, through-hole conductor, and varistor layerare congested so as to readily produce cracks.