Metal working – Piezoelectric device making
Reexamination Certificate
2007-09-25
2007-09-25
Trinh, Minh (Department: 3729)
Metal working
Piezoelectric device making
C029S025410, C029S025420, C156S089120
Reexamination Certificate
active
10700371
ABSTRACT:
A method of producing a laminated dielectric element of high quality, free of delamination. A method of producing a laminated dielectric element1by alternately laminating dielectric ceramic layers12and base metal electrode layers13,comprising the steps of printing electrodes by applying a paste material for the base metal electrodes onto the surfaces of at least one side of the ceramic green sheets, laminating and press-adhering the ceramic green sheets to fabricate a laminate thereof, dewaxing the laminate, reducing the electrodes to form base metal electrode layers by heating the laminate while flowing an atmospheric gas and by reducing the paste material for the base metal electrodes, and sintering the laminate. In the step of reducing the electrodes, the paste material for the base metal electrodes is so reduced that the amount of the base metal oxide remaining in the base metal electrode layers is not larger than 20% by weight and that the amount of lead liberated from the ceramic material is not larger than 30 atomic % within 5000 Å from the surfaces of the base metal electrode layers.
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German Office Action dated Dec. 22, 2006 issued in counterpart German Application No. 103 51 377.9-34 with English translation.
Fujii Akira
Kai Ryoji
Nagaya Toshiatsu
Sawaguchi Kumi
Shindo Hitoshi
DENSO Corporation
Nippon Soken Inc.
Trinh Minh
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