Patent ID: 8513137

Claim:
A method of producing a semiconductor device through a plasma processing on a semiconductor substrate, the method comprising the steps of: putting a semiconductor substrate to be processed and a process gas into a processing cavity defined in a processing chamber; radiating a microwave for exciting a plasma from a microwave radiating antenna having a microwave radiating surface to the processing cavity; providing a dielectric body so as to be opposed to the microwave radiating surface; and determining a distance D between the microwave radiating surface and a surface of the dielectric body facing away from the microwave radiating surface, which is represented with a wavelength of the microwave being a distance unit, to be in a range satisfying an inequality 0.7 ×n/ 4 ≦D≦ 1.3 ×n/ 4 ( n being a natural number), wherein no additional microwave radiating antenna is located between the microwave radiating antenna and the dielectric body.