Patent ID: 11887826
Assignee: KIOXIA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A plasma sputtering apparatus comprising:
a stage configured to hold a substrate that a film is to be deposited on;
a backing plate facing the stage and configured such that a target containing an insulating film deposition material is to be joined;
an earth shield having an opening configured to enclose the target, and a plurality of through holes provided over a whole circumference of a circumferential part of the opening;
a cooling channel provided on an upper surface of the backing plate; and
a magnet provided in the cooling channel, wherein
the plurality of through holes extend in an oblique inward to a bottom surface of the earth shield, and
an aperture diameter of the plurality of through holes is larger than a distance between the target and the opening.