2.How can a cover lens apply on touch panel?
Select hard sheets(PMMA, PC, glass), or thin films(PC, PET, TAC) as to different types of touch solution. Decide the adhesion way to laminate the cover lens on.
Normally, thin films with adhesive suitable for the resistive touch panels. Either hard sheets, or thin films may suitable for both capacitive and IR touch.
With fine tune on IC drivers, both double sides tape, and OCA/OCR bounding may achieve great sensitivity through the covers.