Patent ID: 7208838

Claim:
A semiconductor device comprising: a substrate having a first through-hole formed therein; an electrode being formed on the substrate, the electrode having a second through-hole formed therein that overlaps with the first through-hole, the second through-hole being larger than the first through-hole; an interlayer dielectric being formed between the substrate and the electrode, the interlayer dielectric having a third through-hole formed therein that overlaps with the first and second through-holes, the third through-hole being larger than the first through-hole; a conductive member being inserted into the first, second and third through-holes, the conductive member having a first portion positioned in the first through-hole and a second portion positioned in the second and third through-holes, the second portion positioned in the second and third through-holes, the second portion having a larger diameter than the first portion; and an insulating material being disposed around the conductive member in the first, second and third through-holes the insulating material including a wall portion located higher than at least the electrode, the conductive member being formed over the wall portion of the insulating material from the first, second and third through-hole and being connected with the electrode.