Patent ID: 6553657
Filing Date: 2003-04-29
Classification: H01L,Y10T

Abstract:
A method of manufacturing an electronic device comprising the steps of:providing a semiconductor device having a semiconductor chip which is formed with semiconductor elements and a plurality of electrodes on its principal surface, a plurality of leads each having an inner portion and an outer portion, a plurality of wires electrically connecting the electrodes of the semiconductor chip with the inner portions of the leads and a sealing body encapsulating the semiconductor chip, the inner portions of the leads and the wires, wherein each of the outer portions of the leads are formed into gull-wing shape having a first part which extends in a direction away from the sealing body, a second part which bends downwards from the first part, a third part which extends from the second part in a direction away from the sealing body, a first bent portion formed between the first part and the second part and a second bent portion formed between the second part and the third part; providing a mounting substrate having a principal surface and a plurality of electrodes formed on the principal surface; and soldering the third parts of the leads on respective electrodes of the mounting substrate, wherein each of the first bent portion has a width equal to or greater than a thickness of the lead, wherein each of the third part has a width less than a thickness of the lead, and wherein the plurality of leads are arrays in a width direction of the leads.