Patent ID: 6406990
Filing Date: 2002-06-18
Classification: H01L,H05K

Abstract:
A method of mounting a semiconductor chip on a circuit board, said semiconductor chip having a terminal bump, said circuit board having a wiring pattern with an electrode area and a thermoplastic resin coat covering the electrode area of the wiring pattern, said method comprising the steps of:heating and melting the thermoplastic resin coat of said circuit board; pressing the terminal bump of said semiconductor chip on the thus melted thermoplastic resin coat while applying an ultrasonic wave to the terminal bump so that the terminal bump penetrates the melted thermoplastic resin coat and comes into contact with the electrode area; bonding the terminal bump and the electrode area by continuously applying an ultrasonic wave to the terminal bump while in contact with the electrode area; and cooling and solidifying the melted thermoplastic resin coat so as to securely mount said semiconductor chip on said circuit board.