Three Layer TAB Tape

Tape constructed with a conductive metal layer, typically 35 micron thick copper; a flexible heat resistant support layer, typically 125 micron thick polyimide; and an adhesive layer between the conductive layer and the flexible support layer. The polyimide thickness is not limited in the three layer tape manufacturing process because the openings in the tape are punched out rather than etched. The copper is usually tin or gold plated.