Patent ID: 8871532
Filing Date: 2014-10-28
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising the steps of: (a) providing a plurality of semiconductor chips in which devices are formed; (b) assembling the plurality of semiconductor devices by forming an external terminal to be electrically connected with each of the semiconductor chips; (c) providing a burn-in board including a plurality of sockets over a front surface thereof; (d) performing a burn-in process on the semiconductor devices in such a state of loading the semiconductor devices in the sockets, respectively, the burn-in board further comprising: (x1) an organic multilayer wiring substrate including an internal signal wiring layer, a front side outermost power supply/grounding wiring layer, and a back side outermost power supply/grounding wiring layer; (x2) a front side power supply/grounding wiring which covers almost all of a front surface of the organic multilayer wiring substrate where the sockets are not provided, and which belongs to the front side outermost power supply/grounding wiring layer; (x3) a solder resist film which covers almost all of the front surface of the organic multilayer wiring substrate; and (x4) a plurality of microscopic openings formed over almost all of the front side power supply/grounding wiring that are covered and in contact with the solder resist film.