Patent ID: 6089184
Filing Date: 2000-07-18
Classification: C23C

Abstract:
A CVD (chemical vapor deposition) apparatus, comprising:a chamber configured to maintain vacuum conditions having an exhausting system;a susceptor disposed in the chamber, configured to mount an object to be processed;an exhausting system configured to vacuum-exhaust an atmosphere of the chamber including a gasified raw material introduced thereinto;an Al raw material supply system having an Al raw material supply line configured to introduce a gasified Al raw material into the chamber, in order to form an Al film;said Al raw material supply system comprising;an Al raw material gas generating device having the Al raw material supply line for supplying an Al gaseous raw material and a vessel to which a liquid-state Al raw material is to be loaded, and configured to generate an Al raw material gas by bubbling with a carrier gas and introduce the Al raw material gas into the chamber;an Al gas bypass device configured to either supply the generated Al raw material gas to the chamber or to exhaust the generated Al raw material gas outside using the exhausting device by switching a valve;a first gas purge device configured to purge a remaining gas in the chamber or in a gas pipe by supplying a carrier gas either from the Al raw material gas supply line to the chamber or from the Al raw material supply line to the Al raw material gas bypass device; andan Al raw material switch configured to switch either between the Al raw material gas bypass device and the Al raw material supply line or between the first gas purge device and the Al raw material supply line; anda Cu raw material supply system having a Cu raw material supply line configured to introduce a gasified Cu raw material supply line configured to introduce a gasified Cu raw material into the chamber, in order to form a Cu film, said Cu raw material supply line being independent of said Al raw material supply line;said Cu raw material supply system comprising:a Cu raw material gas generating device having the Cu raw material supply line for supplying a Cu gaseous raw material and a vessel to which a solid-state Cu raw material is to be loaded, and configured to generate a Cu raw material gas by heating to vaporize the Cu raw material and to introduce the Cu raw material gas into the chamber;an Cu gas bypass device configured to either supply the generated Cu raw material gas to the chamber or to exhaust the generated Cu raw material gas outside using the exhausting device by switching a valve;a second gas purge device configured to purge a remaining gas in the chamber or in a gas pipe by supplying a carrier gas either from the Cu raw material gas supply line to the chamber or from the Cu raw material supply line to the Cu raw material gas bypass device; andan Cu raw material switch configured to switch either between the Cu raw material gas bypass device and the Cu raw material supply line or between the first gas purge device and the Cu raw material supply line,wherein the Al film, formed of the Al raw material gas, and the Cu film, formed of the Cu raw material gas, are alternately stacked one upon the other by chemical vapor deposition (CVD) on a surface of the object mounted on the susceptor by introducing the Al raw material gas or the Cu raw material gas alternately.