Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate
2005-03-01
2008-09-30
Le, Huyen D (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Microphone capsule only
C381S399000, C381S426000
Reexamination Certificate
active
07430297
ABSTRACT:
A ribbon microphone includes a diaphragm made of an aluminum foil. To provide a corrosion resistance and a favorable electrical connection in the junction between the aluminum foil and backplates for a long time, a gold deposited film is formed on opposite surfaces of the diaphragm. Preferably, a gold deposited film is also formed on the inner surfaces of electrode plates attached to each end of the diaphragm.
REFERENCES:
patent: 3564163 (1971-02-01), Hobrough
patent: 4473723 (1984-09-01), Hobrough
patent: 5062140 (1991-10-01), Inanaga et al.
patent: 7136496 (2006-11-01), van Halteren et al.
Kabushiki Kaisha Audio-Technica
Kanesaka Manabu
Le Huyen D
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