... Structure 3.Type: Tactile 4.100% function test LED Membrane switch This is a LED embedded membrane switch . A : Structure of menbrane ... dome according to the design and customer request, such as round, triangle, foursquare, rectangle and ellipse.) 6. Touching : flat or ... Normally between 0.06” -0.08". 7. Assembled with SMD, LED, resistors and connectors ,etc. B : Application of menbrane circuit board ...