Plasma process apparatus
First Claim
1. An apparatus for processing a process region of a substrate, using a plasma, comprising:
- a casing for defining an air-tight process chamber and provided with a window plate made of dielectric;
an exhaust for exhausting and setting the process chamber to a vacuum;
a work table arranged in the process chamber and having a support face opposed to the window plate, said substrate being mounted on the support face of the work table, facing said process region to the window plate;
a main supply for supplying a process gas between the window plate and the substrate on the support face of the work table, at least a part of the process gas being transformed into the plasma;
an induction electrode for generating electromagnetic field between the window plate and the substrate on the support face of the work table to induce generation of the plasma, and including plural conductive coils arranged outside the process chamber and opposed to the window plate; and
a power supply section for applying high frequency voltages to the coils;
wherein high frequency voltages applied to the coils are the same in phase and directions of current flowing through adjacent portions of the coils are the same.
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Accused Products
Abstract
A plasma CVD apparatus for forming a silicon film on an LCD substrate includes a container which is divided into process and upper chambers by a quartz partition plate. A work table on which the substrate is mounted is arranged in the process chamber and a lower electrode to which a high frequency potential is applied is arranged in the work table. First lower and second upper supply heads are arranged between the partition plate and the work table in the process chamber. SiH4 and H2 gas and He gases are supplied through the first and second supply heads. He gas is transformed into plasma while SiH4 and H2 gas is excited and decomposed by the plasma thus formed. Two coils are arranged in the upper chamber and high frequency voltages are applied to the coils to generate electromagnetic field to induce the transforming of He gas into plasma. High frequency voltages applied to the coils are the same in phase and directions of current flowing through adjacent portions of the coils are the same.
165 Citations
22 Claims
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1. An apparatus for processing a process region of a substrate, using a plasma, comprising:
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a casing for defining an air-tight process chamber and provided with a window plate made of dielectric; an exhaust for exhausting and setting the process chamber to a vacuum; a work table arranged in the process chamber and having a support face opposed to the window plate, said substrate being mounted on the support face of the work table, facing said process region to the window plate; a main supply for supplying a process gas between the window plate and the substrate on the support face of the work table, at least a part of the process gas being transformed into the plasma; an induction electrode for generating electromagnetic field between the window plate and the substrate on the support face of the work table to induce generation of the plasma, and including plural conductive coils arranged outside the process chamber and opposed to the window plate; and a power supply section for applying high frequency voltages to the coils; wherein high frequency voltages applied to the coils are the same in phase and directions of current flowing through adjacent portions of the coils are the same. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 21, 22)
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13. An apparatus for processing a process region of a substrate, using a plasma, comprising:
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a casing for defining an air-tight process chamber and provided with a window plate made of dielectric; an exhaust for exhausting and setting process chamber to a vacuum; a work table arranged in the process chamber and having a support face opposed to the window plate, said substrate being mounted on the support face of the work table, facing said process region to the window plate; a main supply for supplying a process gas between the window plate and the substrate on the support face of the work table, at least a part of the process gas being transformed into the plasma; an induction electrode for generating electro-magnetic field between the window plate and the substrate on the support face of the work table to induce generation of the plasma, and including plural conductive coils arranged outside the process chamber and opposed to the window plate; and a power supply section for applying high frequency voltages to the coils; wherein phases of the high frequency voltages applied to the coils are shifted from each other by 120 degrees. - View Dependent Claims (14, 15)
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16. A CVD apparatus for forming a film on a process region of a substrate, using a plasma, comprising:
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a casing for defining an air-tight process chamber and provided with a window plate made of dielectric; an exhaust for exhausting and setting the process chamber to a vacuum; a work table arranged in the process chamber and having a support face opposed to the window plate, said substrate being mounted on the support face of the work table, facing said process region to the window plate; a main supply for supplying a process gas between the window plate and the substrate on the support face of the work table, and including a first supply member having a first supply head made of dielectric and arranged between the window plate and the support face of the work table and a second supply member arranged between the window plate and the first supply member, said first supply head including a plurality of supply holes to uniformly cover the whole of the process region of the substrate on the support face, said process gas including first and second gases supplied through the first and second supply members, respectively, and said second gas being transformed into the plasma while said first gas being excited and decomposed by the plasma thus formed to provide a material of the film; an induction electrode for generating electro-magnetic field between the window plate and the substrate on the support face of the work table to induce generation of the plasma, and including plural conductive coils arranged outside the process chamber and opposed to the window plate; and a power supply section for applying high frequency voltages to the coils; wherein the phases of the high frequency voltages applied to the coils are shifted from each other by 90 degrees. - View Dependent Claims (17, 18, 19, 20)
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Specification