Patent ID: 9355857
Filing Date: 2016-05-31
CPC Classification: H01J,H01L

Claim Text:
1. A substrate manufacturing apparatus, comprising: a chamber; first and second gas supply units configured to provide first and second gases into the chamber, respectively; first and second supply pipes connecting the first and second gas supply units to the chamber, respectively; a pump configured to pump the first and second gases in the chamber; an exhaust pipe connecting the pump and the chamber; first and second bypass pipes branched off from the first and second supply pipes, wherein the first and second bypass pipes are connected to the exhaust pipe, and wherein each of the first and second bypass pipes bypass the chamber; first and second main supply valves disposed on the first and second supply pipes, respectively, between the chamber and the first and second bypass pipes, wherein, the first and second main supply valves are configured to turn on and off a supply of the first and second gases, respectively; and first and second relief valves disposed on the first and second bypass pipes, respectively, wherein the first and second relief valves are configured to respectively reduce a decrease in an exhaust pressure of each of the first and second gases in the first and second bypass pipes, and wherein the first and second relief valves are configured to stabilize a feed pressure of each of the first and second gases to have a substantially square wave transition profile.