Shower head and cvd apparatus using the same
First Claim
Patent Images
1. A showerhead for a CVD apparatus,comprising:
- a shower plate being made of a metal; and
a porous plate contacting a rear face of said shower plate,wherein a plurality of gas diffusion holes are formed in a plate section of said shower plate, which faces a workpiece, and penetrate the plate section in the thickness direction, andsaid porous plate covers all of the gas diffusion holes.
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Abstract
The showerhead for a CVD apparatus can be easily produced and is capable of forming a film efficiently. The showerhead comprises: a shower plate being made of a metal; and a porous plate contacting a rear face of the shower plate. A plurality of gas diffusion holes are formed in a plate section of the shower plate, which faces a workpiece, and penetrate the plate section in the thickness direction, and the porous plate covers all of the gas diffusion holes.
134 Citations
12 Claims
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1. A showerhead for a CVD apparatus,
comprising: -
a shower plate being made of a metal; and a porous plate contacting a rear face of said shower plate, wherein a plurality of gas diffusion holes are formed in a plate section of said shower plate, which faces a workpiece, and penetrate the plate section in the thickness direction, and said porous plate covers all of the gas diffusion holes. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A showerhead for a CVD apparatus,
comprising a main body part being made of a metallic porous material, wherein a plurality of gas diffusion grooves are formed in a plate section of said main body part, which faces a workpiece.
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11. A CVD apparatus,
comprising: -
a process chamber; a showerhead being provided in said process chamber and facing a workpiece; a gas inlet for supplying a gas, which is used for forming a nitride film on the surface of the workpiece, to said showerhead, said gas inlet being formed in a rear face of said showerhead, wherein plasma for forming the film on the workpiece is generated between said showerhead and the workpiece by applying RF waves therebetween, said showerhead comprises;
a shower plate being made of a metal; and
a porous plate being disposed to contact a rear face of said shower plate, anda plurality of gas diffusion holes are formed in a plate section of said shower plate, which faces the workpiece, and penetrate the plate section in the thickness direction, and said porous plate covers all of the gas diffusion holes.
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12. A CVD apparatus,
comprising: -
a process chamber; a showerhead being provided in said process chamber and facing a workpiece; a gas inlet for supplying a gas, which is used for forming a nitride film on the surface of the workpiece, to said showerhead, said gas inlet being formed in a rear face of said showerhead, wherein plasma for forming the film on the workpiece is generated between said showerhead and the workpiece by applying RF waves therebetween, said showerhead comprises a main body part being made of a metallic porous material, and a plurality of gas diffusion grooves are formed in a plate section of said main body part, which faces the workpiece.
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Specification