Patent ID: 8974628
Filing Date: 2015-03-10
Classification: G01N,H01J,H01L

Abstract:
1. A plasma treatment device comprising: a treatment vessel that is capable of being evacuated and at least partly includes a dielectric window; a substrate holding unit that holds a substrate to be treated within the treatment vessel; a treatment gas supply unit that supplies a predetermined treatment gas within the treatment vessel in order to perform a predetermined plasma treatment on the substrate; a slot plate made of a conductor that includes one or plural slots to radiate microwave within the treatment vessel, wherein the slot plate is installed above the dielectric window; a microwave supply unit including a coaxial pipe that supplies microwave into the treatment vessel through the coaxial pipe, the slot plate and the dielectric window in order to generate plasma of the treatment gas by plasma discharge; and an optical monitor unit disposed above the treatment vessel and that optically monitors or measures a surface of the substrate within the treatment vessel through mesh type penetration holes formed in the slot plate installed above the dielectric window, wherein the optical monitor unit includes: