Patent ID: 7374620

Claim:
A substrate processing apparatus comprising: a processing chamber defined by an outer wall and provided with a holding table for holding a processing substrate, an exhaust port for exhausting the inside of said processing chamber, a microwave transmissive window provided on said processing chamber as part of said outer wall so as to face said processing substrate, a microwave antenna provided on said microwave transmissive window and electrically connected to a microwave power supply, a plasma gas supply portion for supplying a plasma gas into said processing chamber, an inner partition wall formed so as to surround said holding table, and a partition wall attaching portion inserted between said processing chamber and said microwave transmissive window to form part of said outer wall and attached with said inner partition wall, said inner partition wall being directly attached to said partition wall attaching portion and said microwave transmissive window and dividing a space inside said processing chamber into a first space containing said holding table and a second space defined by said outer wall and said inner partition wall, and a gap between said microwave transmissive window and said partition wall attaching portion being exhausted through said second space.