Field-effect transistor and method of creating same

1. A field-effect transistor comprising:

a gate comprising a via extending through a semiconductor chip substrate from one surface to an opposite surface of the semiconductor chip substrate;

a source comprising a first toroid of ion dopants implanted in the semiconductor chip substrate surrounding one end of the via on the one surface of the semiconductor chip substrate; and

a drain comprising a second toroid of ion dopants implanted in the semiconductor chip substrate surrounding an opposite end of the via on the opposite surface of the semiconductor chip substrate.

2. The field-effect transistor of claim 1 , wherein the via is substantially perpendicular to the semiconductor chip substrate.

3. The field-effect transistor of claim 1 , wherein the one surface comprises a first circuitized surface of the substrate and wherein the opposite surface comprises a second circuitized substrate.

4. The field-effect transistor of claim 1 , wherein the source is electrically coupled to a first integrated circuit functional unit on the one side of the semiconductor chip substrate and the drain is electrically coupled to a second integrated circuit functional unit on the opposite side of the semiconductor chip substrate.

5. The field-effect transistor of claim 1 , wherein the source is electrically coupled to a first integrated circuit functional unit on a second semiconductor chip and the drain is electrically coupled to a second integrated circuit functional unit on a third semiconductor chip substrate.

6. The field-effect transistor of claim 1 , further comprising a control line electrically connecting the via to control logic for switching the field-effect transistor on and off.

7. The field-effect transistor of claim 1 , wherein the first toroid of ion dopants is substantially semispherical and the second toroid of ion dopants is substantially semispherical.

8. The field-effect transistor of claim 1 , wherein the first toroid of ion dopants comprises a first series of ion dopants implanted at a 45 degree angle relative to the one surface of the semiconductor chip substrate and the second toroid of ion dopants comprises a second series of ion dopants implanted at a 45 degree angle relative to the opposite surface of the semiconductor chip substrate.

9. The field-effect transistor of claim 8 :

wherein the first toroid of ion dopants further comprises a first supplemental series of ion dopants; and

wherein the second toroid of ion dopants further comprises a second supplemental series of ion dopants.

10. The field-effect transistor of claim 9 , wherein the first and second supplemental series of ion dopants are implanted substantially parallel to the one surface of the semiconductor chip substrate.

11. A field-effect transistor comprising:

a via extending through a semiconductor chip substrate from one surface to an opposite surface of the substrate;

a first series of ion dopants implanted in the semiconductor chip substrate at a first energy level surrounding one end of the via on the one surface of the semiconductor chip substrate;

a second series of ion dopants implanted in the semiconductor chip substrate at the first energy level surrounding an opposite end of the via on the opposite surface of the semiconductor chip substrate;

a first supplemental series of ion dopants implanted at a second energy level in the semiconductor chip substrate surrounding the via at the one end of the via; and

a second supplemental series of ion dopants implanted at the second energy level in the semiconductor chip substrate surrounding the via at the one end of the via;

wherein the first series of ion dopants is implanted at a 45 degree angle relative to the one surface and the second series of ion dopants is implanted at a 45 degree angle relative to the opposite surface; and

wherein the first and second supplemental series of ion dopants are implanted substantially parallel to the one surface of the semiconductor chip substrate.