Membrane Switch keypads Description:
1. Copper foil substrate (Copper Film)
Copper foil: basically divided into two kinds of electrolytic copper and rolled copper common thickness 1oz 1/2oz and 1/3 oz
Substrate film: a common thickness of the 1mil with 1/2mil two kinds.
Glue (adhesive): thickness according to customer requirements.
2. Cover film protection film (Cover Film)
Cover film protection film: surface insulation. The common thickness 1mil with 1/2mil.
Glue (adhesive): thickness according to customer requirements.
Adhesive buildup of foreign matter before pressing the shape from the paper: avoid; easy job.
3. Stiffener (PI Stiffener Film)
Stiffener: reinforcing the mechanical strength of the FPC, to facilitate the surface mounting job. Common thickness 3mil to 9mil.
Shape from the paper: to avoid foreign matter adhesive buildup Crimping before the.
4. EMI: electromagnetic shielding film, the protection circuit board line without interference from the outside world (a strong electromagnetic District or susceptible to interference zone).
