Patent ID: 8114245
Filing Date: 2012-02-14
Classification: H01J

Abstract:
1. A plasma etching device, comprising: a chamber ( a parallel plate first electrode I ( the first electrode I ( a base ( a second electrode II ( the second electrode II ( the second electrode II comprising i) a central inner portion electrode ( a first high frequency power supply ( a second high frequency power supply connected to the outer portion electrode ( a plasma space defined between the first electrode I and the second electrode II; the inner portion electrode and the outer portion electrode disposed in facing confronting opposition to the first electrode I with the plasma space therebetween, a surface of the outer portion electrode facing the plasma space and a surface of the inner portion electrode facing the plasma space mounted substantially parallel with a surface of the first electrode I facing the plasma space; and a control arranged so that the first high frequency power supply is controlled to apply power to the first electrode I independently of the second high frequency power supply applying power to the outer portion electrode; an impedance adjusting auxiliary electrode ( a junction impedance adjusting element ( all portions of the junction impedance adjusting element ( a unidirectional magnetic field generator ( wherein said impedance adjusting auxiliary electrode ( said local electrode is formed of a conductive material provided only, wherein the local electrode is formed from a combination of a first local electrode part formed of a conductive material provided at least at one side and a second local electrode part formed of an electrically insulating material provided at a portion other than said at least one side, and wherein a surface of the local electrode to be exposed to plasma is one of at the same height as a surface of the base, and higher than a surface of the base within a distance of 0.1 to 1 mm.