Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Reexamination Certificate
2007-10-09
2007-10-09
Lam, Cathy F. (Department: 1775)
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
C428S209000, C174S257000, C156S089120
Reexamination Certificate
active
11131203
ABSTRACT:
There is provided a multilayer ceramic device enabling achievement of secure electric connection via electroconductive members in through holes and reduction in the thickness of internal electrodes during manufacturing. In multilayer piezoelectric device1, a melting point of a material of the electroconductive members in the through holes is higher than a melting point of a material of the internal electrodes2and others. For this reason, the electroconductive members in the through holes have a contraction percentage in baking smaller than that of the internal electrodes2and others. Therefore, contraction of the electroconductive members is relatively constricted in baking, so as to decrease the difference of contraction percentages in baking between green sheets intended for piezoelectric layers3and others, and the electroconductive members in the through holes. This results in preventing breakage of the electrical connection via the electroconductive members in the through holes. On the other hand, contraction of the internal electrodes2and others is relatively promoted in baking, so as to make the internal electrodes2and others thinner by baking.
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Lam Cathy F.
Oliff & Berridg,e PLC
TDK Corporation
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