Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-12-09
2008-12-30
Kim, Paul D (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S025420, C029S609100, C029S876000, C029S877000, C216S062000, C216S066000, C216S067000, C156S308200, C156S309600, C156S309900, C156S320000, C367S178000, C367S180000, C381S174000, C381S191000, C438S003000, C438S042000, C438S057000, C438S098000
Reexamination Certificate
active
07469461
ABSTRACT:
A method for making a diaphragm unit of a condenser microphone includes the steps of: forming a liftoff layer on a substrate; forming an insulator diaphragm film on the liftoff layer; and removing the liftoff layer from the diaphragm film and the substrate so as to separate the diaphragm film from the substrate.
REFERENCES:
patent: 5490220 (1996-02-01), Loeppert
patent: 5759870 (1998-06-01), Yun et al.
Chang Chao-Chih
Chen Ji-Liang
Horng Ray-Hua
Lai Chung-Chin
Tsai Jean-Yih
Kim Paul D
Taiwan Carol Electronics Co. Ltd.
Trop Pruner & Hu P.C.
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