Semiconductor device and method of manufacturing the same
A semiconductor device with improved reliability is provided. The semiconductor device is characterized by its embodiments in that sloped portions are formed on connection parts between a pad and a lead-out wiring portion, respectively. This feature suppresses crack formation in a coating area where a part of the pad is covered with a surface protective film.
1. A semiconductor device, comprising:
(a) a plurality of pads arranged along an edge side of a semiconductor chip; and
(b) a lead-out wiring portion provided on each of the pads; and
wherein the plurality of pads include:
(b1) a plurality of outer pads disposed along the edge side; and
(b2) a plurality of inner pads disposed along the edge side and located farther from the edge side than the outer pads, and
wherein a connecting part between each inner pad and the corresponding lead-out wiring portion is provided with a sloped portion, and a connecting part between each outer pad and the corresponding lead-out wiring portion is not provided with a sloped portion, and
wherein at each outer pad, the corresponding lead-out wiring portion is provided so as to be connected to a side farthest from the edge side among a plurality of sides of the outer pad.
2. The semiconductor device according to claim 1 ,
wherein outer pads and inner pads are arranged in a zigzag formation.
3. The semiconductor device according to claim 2 ,
wherein at each inner pad, the corresponding lead-out wiring portion is provided so as to be connected to a side closest to the edge side among a plurality of sides of the inner pad.
4. The semiconductor device according to claim 3 ,
wherein connecting parts at opposite sides of each lead-out wiring portion and the corresponding inner pad are provided with sloped portions.
5. The semiconductor device according to claim 1 , further comprising:
(d) a surface protective film covering each of the plurality of pads, each lead-out wiring portion and each sloped portion,
wherein a part of a surface of each of the plurality of pads is exposed by a respective opening of the surface protective film.
6. The semiconductor device according to claim 5 ,
wherein, at each inner pad and/or each outer pad, a central position of the opening is shifted in an inward direction of the semiconductor device, relative to a central position of the pad.
7. The semiconductor device according to claim 5 ,
wherein a width of a coating area of the surface protective film that covers a side closest to the edge side among a plurality of sides of each of at least the outer pads is larger than a width of a coating area of the surface protective film that covers a side farthest from the edge side.
8. A semiconductor device, comprising:
(a) a plurality of pads arranged along an edge side of a semiconductor chip; and
(b) a lead-out wiring portion provided on each of the pads; and
wherein the plurality of pads include:
(b1) a plurality of outer pads disposed along the edge side; and
(b2) a plurality of inner pads disposed along the edge side and located farther from the edge side than the outer pads,
wherein connection angles of connecting parts between each inner pad and opposite sides the corresponding lead-out wiring portion are obtuse angles, and connection angles of connecting parts between each outer pad and opposite sides of the corresponding lead-out wiring portion are right angles.