Patent ID: 11901192
Assignee: HITACHI HIGH-TECH CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. An etching processing apparatus comprising:
a vacuum container;
a stage disposed in a space of the vacuum container and having an upper surface on which a wafer to be processed having an aluminum oxide film disposed in advance on a surface thereof is to be placed;
a plate member disposed above the aluminum oxide film of the wafer being placed on the stage to face the aluminum oxide film with a predetermined gap being provided therebetween, the plate member including a plurality of through holes through which vapor of a processing gas containing hydrogen fluoride is to be introduced into a space located above the aluminum oxide film and including an interior of the gap; and
a temperature adjustment mechanism that adjusts a temperature of the stage or the wafer placed thereon to −20° C. or less.