Plasma processing apparatus and plasma processing method
First Claim
1. A plasma processing apparatus, comprising:
- a processing chamber where a workpiece is processed with plasma generated by raising a gas to plasma with microwaves;
a plurality of waveguides configured to allow a microwave to be transmitted;
a slot antenna in which a plurality of slots is formed at bottom surfaces of the plurality of waveguides;
a plurality of dielectric members configured to allow the microwave propagating through the plurality of waveguides and passing through the plurality of slots to be transmitted;
a latticed frame configured to support multiple rows of the plurality of dielectric members disposed in a regular pattern on a ceiling of the processing chamber;
a plurality of horizontal spray gas nozzles including first injection holes, the plurality of horizontal spray gas nozzles being fixed onto a bottom surface of the latticed frame, and being configured to project out toward an upper surface of a workpiece, the first injection holes opening along a direction parallel with the upper surface of the workpiece; and
a plurality of vertical spray gas nozzles including second injection holes, the plurality of vertical spray gas nozzles being fixed onto the bottom surface of the latticed frame, and being configured to project out toward the upper surface of the workpiece and to hang out from the latticed frame, a length of each of the plurality of vertical spray gas nozzles being longer than a length of each of the plurality of horizontal spray gas nozzles, the second injection holes opening along a direction perpendicular to the upper surface of the workpiece, and whereineach row of the plurality of horizontal spray gas nozzles and vertical spray gas nozzles is disposed alternately in a direction parallel with a longer extending direction of the plurality of waveguides at the bottom surface of the latticed frame, and the plurality of slots and each row of the plurality of horizontal spray gas nozzles and vertical spray gas nozzles are disposed in a regular pattern over the ceiling of the processing chamber, and wherein a distance from each of the plurality of slots to a closest horizontal spray gas nozzle or vertical spray gas nozzle is uniform.
1 Assignment
0 Petitions
Accused Products
Abstract
At a frame 26 in a microwave plasma processing apparatus 100, numerous horizontal spray gas nozzles 27 formed therein injection holes A and numerous vertical gas nozzles 28 formed therein injection holes B are fixed. A first gas supply means 50 injects argon gas through the injection holes A into an area near each dielectric parts 31a. A second gas supply means 55 injects silane gas and hydrogen gas through the injection holes B into a position at which the gases do not become over-dissociated. The gases injected as described above are raised to plasma with a microwave transmitted through each dielectric parts 31a. Since the vertical gas nozzles 28 are mounted at positions at which they do not block the flow of plasma traveling toward a substrate G, ions and electrons do not collide with the vertical gas nozzles 28 readily.
14 Citations
15 Claims
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1. A plasma processing apparatus, comprising:
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a processing chamber where a workpiece is processed with plasma generated by raising a gas to plasma with microwaves; a plurality of waveguides configured to allow a microwave to be transmitted; a slot antenna in which a plurality of slots is formed at bottom surfaces of the plurality of waveguides; a plurality of dielectric members configured to allow the microwave propagating through the plurality of waveguides and passing through the plurality of slots to be transmitted; a latticed frame configured to support multiple rows of the plurality of dielectric members disposed in a regular pattern on a ceiling of the processing chamber; a plurality of horizontal spray gas nozzles including first injection holes, the plurality of horizontal spray gas nozzles being fixed onto a bottom surface of the latticed frame, and being configured to project out toward an upper surface of a workpiece, the first injection holes opening along a direction parallel with the upper surface of the workpiece; and a plurality of vertical spray gas nozzles including second injection holes, the plurality of vertical spray gas nozzles being fixed onto the bottom surface of the latticed frame, and being configured to project out toward the upper surface of the workpiece and to hang out from the latticed frame, a length of each of the plurality of vertical spray gas nozzles being longer than a length of each of the plurality of horizontal spray gas nozzles, the second injection holes opening along a direction perpendicular to the upper surface of the workpiece, and wherein each row of the plurality of horizontal spray gas nozzles and vertical spray gas nozzles is disposed alternately in a direction parallel with a longer extending direction of the plurality of waveguides at the bottom surface of the latticed frame, and the plurality of slots and each row of the plurality of horizontal spray gas nozzles and vertical spray gas nozzles are disposed in a regular pattern over the ceiling of the processing chamber, and wherein a distance from each of the plurality of slots to a closest horizontal spray gas nozzle or vertical spray gas nozzle is uniform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification