CLICK-ACTION MEMBRANE SWITCH UNIT

摘要

A click-action membrane switch unit comprises a flexible base film having two surfaces, flexible circuits formed on at least one of said two surfaces of the base film and having interdigitating electrode contacts, a resist film formed on the flexible circuits and having a window in the region of the electrode contacts, a dome-shaped click spring made of electrically conducting material and having an edge placed on the circuits, and a layer fixed to the other surface of the base film and having an opening formed in the portion of the layer which aligns with the click spring.