Patent ID: 11862434
Assignee: PSK, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A substrate processing apparatus, comprising:
a process treating unit providing a treating space performed treating the substrate; and
a plasma generation unit generating plasma by discharging a process gas, and supplying the plasma to the treating space,
wherein the plasma generation unit comprises:
a plasma chamber having a plasma generating space;
an antenna wound to surround the plasma chamber outside the plasma chamber; and
a first coating film covering inside walls of the plasma chamber and comprising yttrium fluoride (YF3), and

wherein, when viewed from a front cross-section of the plasma chamber, a thickness of the first coating film in an upper area, including an uppermost edge, of the plasma chamber and in a lower area, including a bottommost edge, of the plasma chamber is more than the thickness of the first coating film in a central area, including a centerline, of the plasma chamber,
wherein the antenna is an inductively coupled plasma (ICP) antenna,
wherein a power source applying a power to the antenna is connected to one end of the antenna, and an opposite end of the antenna is grounded, and
wherein, when viewed from the front cross-section of the plasma chamber, the one end and the opposite end of the antenna are provided in a height corresponding to the upper area and the lower area of the plasma chamber.