Patent ID: 7332039

Claim:
A plasma processing apparatus in which a processing gas is plasmatized and the plasmatized gas is applied to a workpiece, said apparatus comprising: an annular inner holder; an annular open-ended hollow inner electrode having a larger diameter than said inner holder and surrounding said inner holder; an annular open-ended hollow outer electrode having a larger diameter than said inner electrode and surrounding said inner electrode; and an annular outer holder having a larger diameter than said outer electrode and surrounding said outer electrode, said outer holder being fixed in position with said inner holder; said inner holder being provided with a plurality of inner pushers, said inner pushers being spacedly arranged in the peripheral direction of said inner holder and adapted to push said inner electrode radially outwardly; said outer holder being provided with a plurality of outer pushers, said outer pushers being spacedly arranged in the peripheral direction of said outer holder and adapted to push said outer electrode radially inwardly.