MEMBRANE SWITCHES- This eight-page booklet is a designer's guide that offers engineers a comprehensive overview of membrane switch features, technical issues, and problem areas. Topics covered include switch circuit design, key embossing options, EMI shielding techniques, and panel illumination. The booklet covers 26 topics in all and includes a specification checklist on the back page that designers can use to verify that they have considered all 26 topics during the design process.