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    Membrane Switch Construction
Graphic overlay: Screened graphics, embossed keys or borders, hydroformed polydomes
Upper circuit layer: Shorting pads that contact lower circuit when keys are pressed
Spacer: Separates conductive layers
Lower circuit layer: Switch grids, external traces, optional LED's

5026 Highway 169 North / Minneapolis, MN 55428-4027
Tel: 800-352-3493 / 763-535-7257 / Fax: 763-535-7221 
E-mail: info@techno-mark.com