Patent ID: 6289583
Filing Date: 2001-09-18
Classification: G01R,Y10T

Abstract:
A process for manufacturing a card with multiple tips for testing one or more semiconductor chips of integrated circuits before encapsulation thereof, and comprising a substrate (10), one of the surfaces being provided with conducting strips connected to contacts in the form of tips (26), the process comprising:anisotropically etching a surface of the substrate (10), the etching being nonemergent to form an electrical contact connection point;forming an insulating layer on the surface of the monolithic substrate (10);depositing a thin metal layer (22) by vapour deposition in a vacuum or by cathode sputtering directly on the insulating layer formed on the surface of the monolithic substrate (10);forming the conducting strips by UV photolithography operation using a photosensitive resin, followed by etching of the thin metal layer (22) according to the location and shape of the tips (26);performing another UV photolithography operation comprising depositing a thick layer (24) of photosensitive resin on the etched thin metal layer, the resin being revealed with a drawing (25) of the tips;then manufacturing the tips (26) by electroforming using a metal ion bath to obtain electroformed pads corresponding to the shape of the drawing (25); anddissolving a remaining portion of the thick layer (24) of photosensitive resin in a solvent bath to obtain the tips (26) on the monolithic substrate (10).