Patent Number: 053961412
Section: claims

1. A radioisotopic power source comprising: a substrate of semiconductor material, said substrate including integrated circuitry formed therein;  a trench formed in said substrate;  a PN junction formed along the wall of said trench;  a first power lead connected to the P portion of said PN junction;  a second power lead connected to the N portion of said PN junction; and  a radioactive source deposited in said trench. 2. The radioisotopic power source of claim 1, wherein said radioactive source comprises an .alpha. particle emitting radioactive source. 3. The radioisotopic power source of claim 1, wherein said radioactive source comprises a .beta. particle emitting radioactive source. 4. The radioisotopic power source of claim 1, wherein said radioactive source comprises a photon emitting radioactive source. 5. The radioisotopic power source of claim 1, wherein said radioactive source comprises a charged particle emitting radiation source.