发明授权
- 专利标题： Circuit board
- 专利标题（中）： 电路板
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申请号： US838778申请日： 1986-03-12
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公开(公告)号： US4677529A公开(公告)日： 1987-06-30
- 发明人: Masamichi Watanabe , Yasushi Watanabe
- 申请人： Masamichi Watanabe , Yasushi Watanabe
- 专利权人： Alps Electric Co., Ltd.
- 当前专利权人： Alps Electric Co., Ltd.
- 优先权： JPX36002/85 19850312
- 主分类号： H05K1/18
- IPC分类号： H05K1/18 ; H01H13/70 ; H01H13/702 ; H05K1/00 ; H05K1/14 ; H05K1/16 ; H05K7/02
摘要：
A circuit board for use in a keyboard has a lower insulating sheet, an insulating sheet, and an upper insulating sheet stacked on top of each other. Switch circuit patterns are formed on the upper and lower insulating sheets so as to be opposed to each other. Circuit patterns acting as electrical parts such as rheostats are formed on the insulating spacer.