Patent ID: 8759971

Claim:
A semiconductor apparatus comprising: a semiconductor substrate; a first semiconductor chip provided on the semiconductor substrate; a solder bump formed on the first semiconductor chip; a solder dam arranged in substantially a rectangular and annular manner outside around the solder bump on the first semiconductor chip by alternately connecting four sides and four quarter or less arcs; an electrode pad placed outside of the solder dam in the first semiconductor chip; a second semiconductor chip provided on the first semiconductor chip in electric connection to the first semiconductor chip via the solder bump; and an under-fill material filling a clearance between the first semiconductor chip and the second semiconductor chip inside of the solder dam, wherein: a difference between an inner diameter and an outer diameter of each the arcs is 60 μm, and a center radius of each the arcs is 307.5 μm; and the solder bump and the solder dam are made of SnCu or SnAg.