Semiconductor device with means for preventing solder bridges, and method for manufacturing semiconductor device

摘要

A semiconductor device includes a semiconductor element on which electrode pads are laid out. A wiring substrate includes connecting pads respectively arranged in correspondence with the electrode pads. Pillar-shaped electrode terminals are respectively formed on the electrode pads of the semiconductor element. A solder joint electrically connects a distal portion of each electrode terminal and the corresponding connecting pad on the wiring substrate. Each electrode terminal includes a basal portion, which is connected to the corresponding electrode pad, and a guide, which is formed in the distal portion. The guide has a smaller cross-sectional area than the basal portion as viewed from above. The guide has a circumference and the basal portion has a circumference that is partially flush with the circumference of the guide. The guide is formed to guide solder toward the circumference of the guide.

主权项

1. A semiconductor device comprising:
a semiconductor element on which a plurality of electrode pads are laid out; a wiring substrate including a plurality of connecting pads respectively arranged in correspondence with the plurality of electrode pads; a plurality of cylindrical pillar-shaped electrode terminals respectively formed on the plurality of electrode pads of the semiconductor element; and a solder joint that electrically connects a distal portion of each electrode terminal and the corresponding connecting pad on the wiring substrate, wherein each electrode terminal includes a basal portion, which is connected to the corresponding electrode pad, and a guide, which is formed in the distal portion, the guide including a cutout formed so that apart of an original peripheral surface of the cylindrical pillar-shaped electrode terminal remains as an arcuate peripheral surface of the guide in the distal portion, the guide has a smaller cross-sectional area than the basal portion as viewed from above, the basal portion has a circumference that is partially flush with the arcuate peripheral surface of the guide to form a same plane, the entire arcuate peripheral surface of the guide and the entire circumference of the basal portion are parallel to a longitudinal axis of the cylindrical pillar-shaped electrode terminal, and the guide is formed to guide solder toward the arcuate peripheral surface of the guide.