Ceramic metal matrix diaphragm for loudspeakers
US6404897B1 · kind B1 · utility
9Cited by
6References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 14, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Jan 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and wherein the core is formed by stamping a sheet of standard gauge aluminum to form a speaker core and then deep anodizing the core to obtain a ceramic layer of alumina on each surface (Al2O3) which is at least about 1 mil. thick.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.