Patent ID: 6717165
Filing Date: 2004-04-06
Classification: F04D,H01J

Abstract:
A device for detecting a turbo pump drive state in a tandetron accelerator of a semiconductor ion implantation device, comprising:a turbo pump formed inside of the accelerator; a stripper formed inside the accelerator, a current detecting part formed inside of the accelerator for detecting a turbo pump driving current applied to the turbo pump, and providing a first electrical signal indicative of the detected turbo pump driving current; an electro-optical converter formed inside of the accelerator for converting the first electrical signal to an optical signal; a photoelectric converter formed outside of the accelerator for converting the optical signal to a second electric signal; an optical cable formed between the electra-optical converter and the photoelectric converter for carrying the optical signal out of the accelerator; and a displaying part formed outside of the accelerator for receiving the second electric signal and displaying the turbo pump driving current contained in the second electric signals, wherein the current detecting part and the electra-optical converter are assembled on a board and disposed in the stripper, thereby preventing dielectric breakdown.