Patent ID: 8925351
Filing Date: 2015-01-06
Classification: B32B,H01J,Y10T

Abstract:
1. A manufacturing method of a top plate hermetically attached to an upper opening of a tubular shaped container body for forming a processing container of a plasma processing apparatus, the method comprising the steps of; preparing a top plate body comprised of a dielectric body for transmitting an electromagnetic wave, and having a gas ejection hole for ejecting a gas into the processing container; forming a discharge prevention member having a discharge prevention member body comprised of a dielectric body having a permeability, and a dense member comprised of a dielectric body without a permeability covering at least a side face of the discharge prevention member body; and attaching the discharge prevention member in the gas ejection hole of the top plate body, wherein the process for forming the discharge prevention member further comprises the steps of; preparing the dense member formed in a tubular shape; and baking the tubular shaped dense member filled with a material comprising the discharge prevention member body.