Patent ID: 9698112
Date: 2017-07-04
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a semiconductor chip including a wire and a first protective film formed over a surface of the wire and a side surface of the wire with an opening partially exposing the wire; a second protective film stacked over the semiconductor chip and provided with a through-hole on the surface of the wire and covering the side surface of the first protective film; a metal portion formed over the second protective film and the wire so that the through-hole is filled with the metal portion and that a top surface of the metal portion is spread over the surface of the second protective film; and a solder ball formed on the metal portion; wherein the second protective film has a first thick portion provided next to the through-hole; wherein the second protective film has a first thin portion next to the first thick portion, the first thin portion being thinner than the first thick portion; wherein the second protective film has a second thick portion next to the first thin portion, the second thick portion being thicker than the first thin portion, and wherein both the first thin portion and the second thick portion are formed on the first protective film, and the first thick portion is formed on the wire.