Patent ID: 6930388
Filing Date: 2005-08-16
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor element having a circuit surface on which a plurality of circuit electrodes are disposed, said circuit surface being coated with a protecting film, a stress relaxation layer which is formed on the protecting film of the circuit surface of said semiconductor element so as to expose the circuit electrodes, is made of a cured thermoplastic resin and has an inclination in the edge portion thereof, to form an inclined edge portion, a wiring layer comprised of a plurality of wirings, each of said wirings being connected to one of the circuit electrodes and disposed so as to make an electrical connection from said circuit electrode, via the edge portion of stress relaxation layer and to a desired site on the surface of the stress relaxation layer, a surface protecting film which covers a surface of the wiring layer so as to expose a prescribed portion on each of the plurality of wirings on the surface of the stress relaxation layer, and an external connection terminal formed by connecting a bump to said prescribed exposed portion of each of the plurality of wirings, wherein a protuberant portion is formed between the inclined edge portion and a flat portion of the stress relaxation layer and wherein a height of the protuberant portion is slightly higher than a height of the flat portion.