Semiconductor device, circuit board, and electronic instrument suitable for stacking and having a through hole
View Patent ↗A semiconductor device includes a semiconductor device body section having a substrate and an electrode formed on the substrate. A through-hole is formed through the electrode and the substrate in a stacking direction of the electrode and the substrate, and a conductive member is inserted into the through-hole. An insulating material which faces at least the through-hole is formed on the electrode. The conductive member is formed over the insulating material from the through-hole and is connected with the electrode.
1. 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.
2. The semiconductor device as defined in claim 1 ,
wherein the insulating material is formed to cover an upper surface of the electrode, and includes a connection hole for connecting at least the electrode with the conductive member at a position differing from the first, second and third through-holes, the wall portion being disposed between the connection hole and the first, second and third through holes.
3. The semiconductor device as defined in claim 1 ,
wherein the conductive member functions as a connection terminal which secures electrical connection in an axial direction of the through-hole.
4. The semiconductor device as defined in claim 1 ,
wherein a part of the conductive member projects outward from the first, second and third through-holes on a side of the substrate opposite to a side on which the electrode is formed.
5. A semiconductor device comprising a plurality of the semiconductor devices as defined in claim 1 which is stacked, each of the semiconductor devices being electrically connected through the conductive member.
6. A circuit board comprising the semiconductor device as defined in claim 1 .
7. An electronic instrument comprising the circuit board as defined in claim 6 .