Patent ID: 6296173
Filing Date: 2001-10-02
Classification: B23K,H05K,Y02P,Y10T

Abstract:
A method of attaching a module having an array of solder balls or columns thereon arranged in a given pattern to a substrate having an array of attachment pads arranged in the same given pattern as said array of solder balls or columns, comprising the steps of:providing an entirely dielectric preform having an array of through holes therein extending from one face thereof to an opposing face and arranged in said given pattern;filling said holes with curable conductive adhesive material having a curing temperature of less than about 240.degree. C.;interposing said preform between said module and said substrate with said conductive adhesive material in the holes in contact with said solder balls or columns and said attachment pads;and curing said conductive adhesive material while in said preform to join said module to said substrate.