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LOW COST MEMBRANE SWITCH DESIGN

IP.com Disclosure Number: IPCOM000005525D
Original Publication Date: 1984-Apr-01
Included in the Prior Art Database: 2001-Oct-11

Publishing Venue

Motorola

Abstract

Conventional design membrane switches are normally constructed using multiple switch layers. Each layer serving as the backing or carrier for a portion of the matrix circuit. Each layer has a connecting tail to carry switching information to a circuit board through a connector. In assembly the switch layers are spaced apart and adhesively bonded together with a"spacer."This element is designed with apertures aligned with the switching positions screened on the switch layers and allows different portions of the switch circuit carried on each layer to be shorted together at the aperture locations with mechanical finger pressure. The schematic for a conventional membrane switch is shown in Figure 1 and is referred to as a standard X-Y matrix.