Patent ID: 11894222
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A film forming apparatus comprising:
a substrate holder configured to hold a substrate for forming a film thereon by a magnetron sputtering;
a target holder configured to hold a target made of a ferromagnetic material to face the substrate holder and extend in a depth direction of the film forming apparatus;
a magnet provided on a surface of the target holder opposite to the substrate holder, and configured to leak a magnetic field to a front surface of the target held by the target holder that is a surface close to the substrate holder;
a driver configured to swing the magnet along a back surface of the target holder in the depth direction of the film forming apparatus; and
a Gauss meter including a hole probe with a hole sensor provided therein and configured to measure a strength of the magnetic field,
wherein a tip of the hole probe is provided at a position substantially coincident with a center of the target held by the target holder in the depth direction of the film forming apparatus.