Patent ID: 7491908

Claim:
A plasma processing device, comprising: a chamber provided to maintain an atmosphere depressurized to less than atmospheric pressure; a transfer pipe connected to the chamber; a gas introduction mechanism provided to introduce a gas into the transfer pipe; a microwave supply source provided to introduce a microwave from outside to inside of the transfer pipe; and a light shield configured to block light emitted from the plasma and to allow passage of active species emitted from the plasma, the light shield being provided substantially in contact with an inner wall of the chamber at a part where the active species are introduced into the chamber, wherein the plasma processing device is provided to form a plasma of the gas in the transfer pipe and to perform ashing processing to remove a resist of a workpiece having a low-k material on which the resist is formed placed in the chamber, the transfer pipe is connected to an opening in the inner wall of the chamber, the inner wall being generally perpendicular to a major surface of the workpiece, and the workpiece is not provided in a direct line of sight from the plasma.