Patent ID: 11955367
Assignee: SHIBAURA MECHATRONICS CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 0:
1. A film formation apparatus comprising:
a chamber which an interior thereof can be made vacuum;
a rotary table that is provided in the chamber and that circulates and carries a workpiece along a circumferential carrying path;
multiple targets that include a film formation material to be deposited and become a film on the workpiece, that face the workpiece circulated and carried by the rotary table, and that are provided in positions at different radial distances from a center of rotation of the rotary table;
a shield member that forms a film formation chamber surrounding a region where the film formation material from the multiple targets scatter, and that has an opening on a side facing the workpiece which is circulated and carried by the rotary table;
a plasma generator that includes a sputter gas introduction unit for introducing a sputter gas into the film formation chamber, and a power supply unit for applying power to the target, and that generates plasma in the sputter gas in the film formation chamber; and
a blocking plate that blocks the film formation material scattered from the target by narrowing the opening,
wherein a first proportion of an area where the blocking plate covers the opening in a region facing the target closest to the center of rotation is larger than a second proportion of an area where the blocking plate covers the opening in a region facing the target farthest from the center of rotation,
wherein the region facing the target farthest from the center of rotation is a region that has an annular arc shape obtained by partitioning, along concentric circles centered on the center of rotation, a region defined by the opening, and that includes a region directly under the target farthest from the center of rotation, but does not include a region directly under the other targets,
and wherein the region facing the target closest to the center of rotation is a region that has the annular arc shape and that includes a region directly under the target closest to the center of rotation, but does not include a region directly under the other targets.