Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1994-05-09
1996-09-17
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
G01R 3126
Patent
active
055572154
ABSTRACT:
According to the present invention, there are provided a self-bias measurement method of measuring the self-bias voltage of an object when the object is subjected to a plasma process by using a plasma generated between a pair of electrodes, the object being held, by means of electrostatic chucking means having an electrostatic chucking electrode, on one of the pair of electrodes situated in a processing chamber, the method including the steps of detecting a leak current between the object and the electrostatic chucking electrode while varying the DC voltage applied to the electrostatic chucking electrode, and calculating the self-bias voltage of the object on the basis of the leak current detected, an apparatus for measuring the self-bias, and an electrostatic chucking apparatus having means capable of measuring the self-bias.
REFERENCES:
patent: 4968374 (1990-11-01), Tsukada
patent: 5167748 (1992-12-01), Hall
Kondo Masaki
Saeki Hiroaki
Kobert Russell M.
Tokyo Electron Limited
Wieder Kenneth A.
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