Patent ID: 8018030

Claim:
A semiconductor device, comprising: a chip; and a low dielectric constant film having a relative dielectric constant of less than 3.5 and a plurality of seal rings, each of the seal rings forming a moisture blocking wall in closed loop form in a plan view, wherein each of the seal rings includes a seal ring protrusion portion in inward protruding form in the vicinity of a corner of the chip, one of the seal rings is an outermost seal ring in the moisture blocking wall formed by the plurality of said seal rings, each of the seal rings comprising 16 lengths arranged to circumscribe a center point of a surface of said chip, with length 1 connected to length 2 , length 2 connected to length 3 , length 3 connected to length 4 , length 4 connected to length 5 , length 5 connected to length 6 , length 6 connected to length 7 , length 7 connected to length 8 , length 8 connected to length 9 , length 9 connected to length 10 , length 10 connected to length 11 , length 11 connected to length 12 , length 12 connected to length 13 , length 13 connected to length 14 , length 14 connected to length 15 , length 15 connected to length 16 , and length 16 connected to length 1 , and length 1 is parallel to length 9 , length 5 is parallel to length 13 , length 3 is parallel to length 11 , length 7 is parallel to length 15 , length 2 is parallel to length 16 , length 4 is parallel to length 6 , length 8 is parallel to length 10 , and length 12 is parallel to length 14 , wherein a sacrifice pattern is provided outside of said sealing protrusion portion of the outermost seal ring from the center of the chip, wherein a passivation film covers said low dielectric constant film, said seal ring and said sacrifice pattern and includes a planar portion and a ridged portion, and wherein the planar portion of said passivation film is formed above said sacrifice pattern and the ridged portion of said passivation film covers a top of each of said seal rings and a part of a side wall of each of said seal rings.