| 摘要 |
An open-contact membrane switch element (1,2) comprising a plastic film substrate (10) carrying a first conductive circuit (13), a dielectric coating (30) applied to cover the circuit (13) on the substrate (10) in a pattern defining uncoated zones (31,32,34) around each contact (14-17) of the circuit (13), and a second conductive circuit (35) applied on the dielectric coating (30) and having conductive tracks (36,37) electrically interconnected at the uncoated zones (31,32,34) to portions of the contacts (14-17) of the first conductive circuit (13).
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