Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2004-11-12
2009-10-27
SanMartin, Jaydi (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S340000, C310S348000
Reexamination Certificate
active
07608977
ABSTRACT:
A surface-mount SAW device configured to prevent sealing resin layer coated all over the top surface of a piezoelectric substrate from becoming charged even if the piezoelectric substrate forming the SAW device is made of a pyroelectric material. The SAW device is composed of a mounting substrate; a SAW chip provided with a piezoelectric substrate, an IDT electrode formed on one surface of said piezoelectric substrate, and connection pads connected via conductor bumps to conductor traces; a flip chip mounted to the mounting substrate; and a sealing resin layer coated all over the outer surface of the SAW chip flip-chip mounted on the mounting substrate and extended down to the top surface of the mounting substrate to define an airtight space between the IDT electrode and the mounting substrate; and wherein the electrical conductivity of the piezoelectric substrate is increased to suppress charging of the sealing resin layer.
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Table 7.9 on p. 458 of a book titledApplied Physics Handbook2ndEd. written by Japan Society of Applied Physics and published in Japan on Apr. 25, 2002 by Maruzen Co., Ltd.
Androlia William L.
Epson Toyocom Corporation
Koda H. Henry
SanMartin Jaydi
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