Methods And Steps For Membrane Switch Ingress Inspection

1, Shape: shape, conductor line, insulation treatment, lining combination, etc. should comply with the drawing requirements or provide physical samples.

2, Material: panel, substrate, silver paste, carbon ink, partition, follow-up agent, adhesive, reinforcement plate, insulation printing should comply with the drawing slate.

3, Check the appearance of quality: the scope of this prosecution is wide. Panel: can not have obvious defects (such as character missing strokes and affect readability; stains, light transmission points; deink, spot, scratch; transparent window overflow, residual glue, etc.); The blank area bias around the four-week panel and line combination is 0.2mm;

The bump and substrate bias at the panel keys is .5mm). Line: no residual material chips, foreign objects, stains, bumps and grease attached to the surface and inside, fingerprints on the line, the finished shape edge of the burr;

All lines and contacts shall not have cuts through the table (i.e. cuts cut from the line to the substrate), minor bruises are also based on the principle of not affecting their impedance, carbon ink surface scratches do not affect the line conductivity as the criterion, the line shall not be attached to any foreign body attached to it. Conductive silver: The thickness of the general silver pulp is controlled at 7-12 m, and should be uniform and smooth, and cannot have obvious defects and pinholes. No breaks or short circuits are allowed. Carbon ink: the carbon ink covered on the silver paste line should ensure that the silver slurry is completely covered, its thickness of 8-10 m, there must be no very obvious silver slurry protruding.