Abstract:
A MET''OD FOR PRODUCING A LARGE SCALE INTEGRATED CIRCUIT ARRAY WITH DISCRETIONARY WIRING BY DETERMINING THE DISTORTION IN THE RECTANGULAR PATTER PRODUCED BY A COMPUTER CONTROLLED CATHODE RAY TUBE, PRODUCING AN ARRAY OF INTEGRATED CIRCUITS ON A SINGLE SEMICONDUCTOR SLICE IN WHICH THE CIRCUITS ARE DISPOSED IN A CORRESPONDINGLY DISTORTED PATTERN, TESTING THE CIRCUITS IN SITU TO DETERMINE THE OPERATIVE CIRCUITS, PRODUCING A PHOTOMASK BY MEANS OF THE CATHODE RAY TUBE, DEFINING THE WIRING NEEDED TO INTERCONNECT THE OPERATIVE CIRCUITS INTO THE DESIRED SYSTEM, AND PATTERNING A METAL FILM BY MEANS OF THE PHOTOMASK.
Abstract:
This specification discloses an improvement in forming an electrically continuous circuit in which one metal conductor is connected with another metal conductor through an aperture in an insulating layer therebetween. The improvement is characterized by electrolessly depositing a metal conductor in and through the aperture to effect electrical connection with the first metal conductors and electrically connecting the second layer metal conductor therewith. Thus, good electrical continuity is effected regardless of the configuration of the sidewalls of the aperture.