Plasma processing device and plasma processing method
A plasma processing device has a chamber that can be depressurized, a plasma source to generate plasma in the chamber, a stage in the chamber on which the conveyance carrier is placed, and a cover on the stage to cover a holding sheet and a frame and including a window portion penetrating a thickness direction. The cover includes an introduction port, a discharge port, and a coolant flow path connecting the introduction port and the discharge port and not overlapping with a region on an inner side of the frame in plan view. The stage includes a supply port communicated with the introduction port to allow supply of coolant to the coolant flow path when the cover is on the stage, and a recovery port communicated with the discharge port to allow recovery of coolant supplied to the coolant flow path when the cover is on the stage.
1. A plasma processing device configured to perform plasma processing on a substrate being held by a conveyance carrier including a frame and a holding sheet, the plasma processing device comprising:
a chamber;
a plasma source configured to generate plasma in the chamber;
a stage that is provided in the chamber and on which the conveyance carrier is placed;
a movable cover placed above the stage to cover the holding sheet and the frame, including a window portion penetrating a thickness direction, including an inner side surrounding the window portion, and formed with a coolant flow path, the inner side of the cover being configured to cover the holding sheet without making contact with the holding sheet;
a pressing unit arranged in the cover at a position between the inner side of the cover and an outer peripheral portion of the cover, facing to the frame, and configured to contact with the frame by pressing, wherein
the coolant flow path is formed in a region of the cover on an outer side with respect to the pressing unit in plan view,
the coolant flow path is not formed in the inner side of the cover in plan view such that the coolant flow path does not overlap with the substrate and the holding sheet inside the frame in plan view,
the cover includes an introduction port, and a discharge port connected with the introduction port via the coolant flow path, and
the stage includes a supply port communicated with the introduction port to allow supply of coolant to the coolant flow path when the cover is placed on the stage, and a recovery port communicated with the discharge port to allow recovery of coolant supplied to the coolant flow path when the cover is placed on the stage.
2. The plasma processing device according to claim 1 , further comprising a drive rod configured to move the cover relative to the stage to a first position at which the cover and the stage contact with each other and a second position at which the cover and the stage are separated from each other to allow conveyance of the conveyance carrier into and out of the stage.
3. The plasma processing device according to claim 2 , wherein the pressing unit includes a plurality of pressing units disposed in a plurality of recesses formed at a plurality of places on the lower surface of the cover on an imaginary circle centered at a center of the cover.
4. The plasma processing device according to claim 1 , wherein the pressing unit includes a plurality of pressing units disposed in a plurality of recesses formed at a plurality of places on the lower surface of the cover on an imaginary circle centered at a center of the cover.