Patent ID: 7520956

Claim:
An on-wafer monitoring system capable of measuring an operation of a plasma treatment apparatus on a wafer, said system comprising: one or a plurality of sensor sections, a power source unit, and an I/O unit that inputs/outputs signals from/to outside, which are provided on a silicon substrate, wherein each of said sensor sections has a pattern portion which comprises an Si02 layer, and which is a plasma treatment target, and under said pattern portion, a plurality of electrodes are disposed for separating ions and electrons of plasma by energy, and an uppermost electrode of said electrodes has the same potential as that of said silicon substrate, and a plurality of pores of predetermined size formed through both said pattern potion and said plurality of electrodes, and a sensor formed at the bottom of each sensor section, wherein said power source unit takes out power from plasma potential or takes out power from photoelectromotive force of a PLZT device.