Electrostatic discharge protection in a portable communication device
US6207912A · kind A · utility
37Cited by
10References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1998 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Mar 2, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/008
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A portable communication device has an electronic circuit board arranged inside a housing, and a keypad, the individual keys of which are arranged, when depressed, to collapse a respective tactile dome on a domefoil interposed between the keypad and the circuit board, so as to establish electric contact with a respective contact point on the circuit board. The domefoil is formed as a non-conductive sheet providing an airtight and/or electrostatic seal between the keypad and the circuit board. The domefoil protects the circuit board from electrostatic discharge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.