Semiconductor device having alignment post electrode and method of manufacturing the same

1. A semiconductor device comprising:

a semiconductor substrate which has an upper surface including a plurality of semiconductor device formation regions and at least one alignment mark formation region having the same planar size as a planar size of each of the semiconductor device formation regions;

a plurality of connection pads formed in each of the semiconductor device formation regions;

an insulating film formed on the upper surface of the semiconductor substrate in all of the semiconductor device formation regions, including on the connection pads except for respective central portions thereof, and in the at least one alignment mark formation region;

a plurality of post electrodes which are formed on an upper side of the insulating film in each of the semiconductor device formation regions and each of which is electrically connected to at least a corresponding one of the connection pads;

at least one alignment post electrode which is formed on an upper side of the insulating film in the alignment mark formation region, and which is smaller in number than the post electrodes formed in each semiconductor device formation region; and

a sealing film which is made from an organic resin and which is formed between the post electrodes in each of the semiconductor device formation regions and on an outside of the alignment post in the alignment mark formation region;

wherein an upper surface of the alignment post electrode is exposed to outside and is flush with an upper surface of the sealing film; and

wherein the semiconductor substrate includes a plurality of non-semiconductor device formation regions around the alignment mark formation region, and each of the non-semiconductor device formation regions has the same planar size as the planar size of each of the semiconductor device formation regions and does not have post electrodes formed thereon.

2. A semiconductor device comprising:

a semiconductor substrate which includes a plurality of semiconductor device formation regions and at least one alignment mark formation region having the same planar size as a planar size of each of the semiconductor device formation regions;

a plurality of post electrodes which are formed in each of the semiconductor device formation regions; and

at least one alignment post electrode which is formed in the alignment mark formation region, and which is smaller in number than the post electrodes formed in each of the semiconductor device formation regions;

wherein the semiconductor substrate includes a plurality of non-semiconductor device formation regions around the alignment mark formation region, and each of the non-semiconductor device formation regions has the same planar size as the planar size of each of the semiconductor device formation regions and does not have post electrodes formed thereon.

3. A semiconductor device comprising:

a semiconductor substrate including a plurality of semiconductor device formation regions in each of which a plurality of connection pads are formed, and at least one alignment mark formation region having the same planar size as a planar size of each of the semiconductor device formation regions;

a plurality of post electrodes which are formed in each of the semiconductor device formation regions and each of which is electrically connected to at least a corresponding one of the connection pads; and

at least one alignment post electrode and a plurality of dummy electrodes which are formed in the alignment mark formation region, the alignment post electrode being smaller in number than the post electrodes formed in each semiconductor device formation region, and the dummy electrodes being not electrically connected to the connection pads;

wherein the plurality of dummy electrodes comprise a plurality of dummy electrodes arranged around the alignment mark formation region.

4. The device according to claim 3 , wherein each of the dummy electrodes has the same planar shape as a planar shape of each of the post electrodes.

5. The device according to claim 4 , wherein the dummy electrodes are arranged with the same pitch as the post electrodes.

6. The device according to claim 3 , wherein said at least one alignment post electrode includes at least one temporary post electrode for use in executing temporary alignment and at least one final alignment post electrode for use in executing final alignment, the temporary alignment post electrode and the final alignment post electrode having different shapes.

7. The device according to claim 6 , wherein the temporary alignment post electrode has a substantially circular planar shape or a substantially rectangular planar shape, and the final alignment post electrode has a substantially cross-shaped planar shape or a substantially L-shaped planar shape.

8. The device according to claim 3 , wherein said at least one alignment post electrode includes at least one temporary post electrode for use in executing temporary alignment and at least one final alignment post electrode for use in executing final alignment, a size of an upper surface of the temporary alignment post electrode being larger than a size of an upper surface of the final alignment post electrode.

9. The device according to claim 3 , further comprising a protective film formed on the semiconductor substrate and having opening portions exposing the plurality of connection pads, wherein the post electrodes, the alignment post electrode, and the dummy electrodes are formed on the protective film.

10. The device according to claim 9 , further comprising a plurality of other connection pads formed in the alignment mark formation region.

11. A semiconductor device comprising:

a semiconductor substrate including a plurality of semiconductor device formation regions in each of which a plurality of connection pads are formed, and at least one alignment mark formation region having the same planar size as a planar size of each of the semiconductor device formation regions;

a plurality of post electrodes which are formed in each of the semiconductor device formation regions and each of which is electrically connected to at least a corresponding one of the connection pads;

at least one alignment post electrode and at least one dummy electrode which are formed in the alignment mark formation region, the alignment post electrode being smaller in number than the post electrodes formed in each semiconductor device formation region, and the dummy electrode being not electrically connected to the connection pads;

a protective film formed on the semiconductor substrate and having opening portions exposing the plurality of connection pads, wherein the post electrodes, the alignment post electrode, and the dummy electrode are formed on the protective film; and

a plurality of other connection pads formed in the alignment mark formation region.