Process for Manufacturing Polymer Film for Use As a Printed Circuit Substrate (Decal-On-Glass)
Original Publication Date: 1988-Aug-01
Included in the Prior Art Database: 2005-Feb-16
The fabrication of printed circuit lines using a decal-on-glass process is accomplished by spraying a polyimide film layer on a glass plate to eliminate the optical anomalies normally associated with an imperfect surface such as aluminum foil. Because the glass plate is transparent it does not interfere with further process steps. The decal remains on the glass plate until after the decal is attached to the card assembly, thereby eliminating the need for external framing during processing. A chrome border around the decal area is needed on the glass carrier to prevent delamination of the decal in the wet process steps.