Patent ID: 6274502
Filing Date: 2001-08-14
Classification: H01J,H01L

Abstract:
A method for plasma etching, said method comprising:a plasma generating step of changing etching gas introduced into a chamber into a plasma with a high-frequency induction field generated by a spiral coil disposed in opposing relation with a sample stage in said chamber;an etching step of guiding the plasma toward a target film on a substrate held by said sample stage to etch said target film; anda gas exhaust step of exhausting gas from said chamber through a gas outlet port provided in a side portion of said chamber,said etching step including the step of guiding the plasma toward said target film to etch said target film, with a higher-voltage region of said spiral coil and an exhaust-side region of said sample stage being positioned on the same side relative to a center axis of said chamber,said higher-voltage region of said spiral coil and said exhaust-side region of said sample stage overlapping each other such that an overlapping angle defined by the position of a center line of said spiral coil relative to the position of a center line of the sample stage is in a range of 135-180.degree..