Patent ID: 8415791

Claim:
A semiconductor device comprising: a support plate having a hole formed therein and a conductor formed on a wall surface of the hole; a semiconductor element; and a conductive post formed by a conductor having a first end portion at one end, and a second end portion at an other end, wherein the second end portion of the conductive post is connected to the semiconductor element, a side surface of the conductive post is fixed to the conductor on the wall surface of the hole deformed by pressing force of the conductive post on a side closer to the first end portion than the second end portion, the conductive post has a columnar conductor and a coating film formed on a surface of the columnar conductor, the columnar conductor of the conductive post has a main component selected from the group consisting of copper, silver, gold and aluminum, and the coating film of the conductive post is a metal selected from the group consisting of chromium, nickel, palladium, titanium and platinum.