Patent Number: 
Section: claims

1. A method for interlocking a lens assembly power supply in ion implantation equipment comprising:relaying a control signal to a positive and a negative power supply; applying a positive voltage generated by the positive power supply and a negative voltage generated by the negative power supply to a lens assembly;detecting a positive voltage and a negative voltage from the positive and negative power supplies respectively;comparing a first relative value of the positive voltage and a second relative value of the negative voltage;changing a mode of the positive and negative power supplies; andgenerating an interlocking signal which interlocks the positive and negative power supplies when a sum of the first relative value and the second relative value does not equal zero. 2. The method according to claim 1, wherein the ion implantation equipment operates in a normal manner when the sum of the first and second relative values equals zero. 3. The method according to claim 1, wherein when the sum of the first and second relative values is not zero, the control signal is interrupted and the positive and the negative power supplies are operated manually. 4. The method according to claim 1, wherein changing a mode of the positive and negative power supplies and generating the interlocking signal occur at substantially the same time. 5. The method according to claim 1, wherein the positive and negative power supplies operate in a remote mode when the sum of the first and second relative values equals zero. 6. A method of generating an interlocking signal comprising:detecting a positive voltage from a positive power supply and a negative voltage from a negative power supply;comparing a first relative value of the positive voltage and a second relative value of the negative voltage; andgenerating an interlocking signal when a sum of the first relative value and the second relative value does not equal zero. 7. The method of claim 6, wherein the interlocking signal interlocks a power supply in an ion implantation device. 8. A method for interrupting an ion implantation process comprising:detecting a positive voltage from a positive power supply and a negative voltage from a negative power supply;comparing a first relative value of the positive voltage and a second relative value of the negative voltage;changing a mode of the positive and negative power supplies; andgenerating an interlocking signal which interrupts the ion implantation process when a sum of the first relative value and the second relative value does not equal zero. 9. The method of claim 8, wherein changing a mode of the positive and negative power supplies and generating the interlocking signal occur at substantially the same time.