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发表于 2017-9-8 15:44:23
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森海專利資料 US8731231中的暗示
The dynamic sound transducer in accordance with a second embodiment has a ring radiator with a vapor-deposited film (Duofol) to reduce the resonance frequency.
One side of the diaphragm, preferably the underside, is coated for example in a sputtering process with an electrically conductive layer 11. To provide an insulating portion 12 a part of the diaphragm can be covered over during the sputtering process. The conductive layer 11 can be produced for example by sputtering AI (some Angströms) and by sputtering AU (about 2000 Angströms).
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