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:
Dec. 10, 2002
Filed:
Jun. 26, 2001
Yukie Nakano, Tokyo, JP;
Takako Hibi, Tokyo, JP;
Mari Miyauchi, Tokyo, JP;
Daisuke Iwanaga, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
The invention provides a multilayer ceramic capacitor capable of preventing the occurrence of cracks by inhibiting the multilayer capacitor from expanding in a stacking direction and a width direction. The multilayer ceramic capacitor includes a capacitor element ( ) in which dielectric layers ( and ) and internal electrodes ( ) are alternately stacked. The capacitor element ( ) is obtained by stacking and firing a dielectric paste layer and an internal electrode paste layer. An expansion coefficient x in the stacking direction lies between −0.05i% and 0.05i% inclusive, where i denotes the number of dielectric layers ( ), preferably the expansion coefficient x is 0% or less, or more preferably the expansion coefficient x lies between −10% and 0% inclusive. Preferably, an expansion coefficient y in the width direction lies between −0.05i% and 0% inclusive. The expansion coefficients x and y can be controlled by adding a carbon material or a lithium-containing compound to the internal electrode paste layer, or by reducing a thickness of the dielectric layer ( ) located in an outermost portion. Thus, the occurrence of cracks is inhibited, and therefore a fraction defective is reduced.