| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed wiring board capable of ensuring air vents even when one layer of a dome switch sheet without air vent is stuck on it. SOLUTION: The printed wiring board of this invention is a target board on which the dome switch sheet is stuck, and a geometrical pattern is applied to the surface of the printed wiring board, and the applied pattern forms the air vents of the dome switch. COPYRIGHT: (C)2009,JPO&INPIT
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