PLASMA PROCESSING APPARATUS AND METHOD
First Claim
1. A plasma processing apparatus for processing a substrate by using a plasma, comprising:
- a processing chamber;
a mounting table, provided in the processing chamber, for mounting thereon a substrate;
a gas shower head formed of a conductive material provided to face the mounting table, the gas shower head having at a bottom surface thereof a plurality of gas injection openings for supplying a processing gas into the processing chamber;
an induction coil to which a high frequency current is supplied to generate an inductively coupled plasma in a region surrounding a space below the gas shower head;
a negative voltage supply unit for applying a negative DC voltage to the gas shower head to allow an electric field induced by the induction coil to be drawn to a central portion in a processing region; and
a unit for evacuating the processing chamber.
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Accused Products
Abstract
A plasma processing apparatus performs a process on a substrate by using plasma. The plasma processing apparatus includes a processing chamber; a mounting table which is located in the processing chamber and on which a substrate is mounted; a gas shower head formed of a conductive material provided to face the mounting table and having at the bottom surface thereof a plurality of gas injection openings for supplying a processing gas into the processing chamber; an induction coil to which a high frequency current is supplied to generate an inductively coupled plasma in a region surrounding a space below the gas shower head; a negative voltage supplying unit for applying a negative DC voltage to the gas shower head to allow an electrical field, which is induced by the induction coil, to be drawn to a central portion of the processing region; and a unit for evacuating the processing chamber.
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Citations
20 Claims
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1. A plasma processing apparatus for processing a substrate by using a plasma, comprising:
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a processing chamber; a mounting table, provided in the processing chamber, for mounting thereon a substrate; a gas shower head formed of a conductive material provided to face the mounting table, the gas shower head having at a bottom surface thereof a plurality of gas injection openings for supplying a processing gas into the processing chamber; an induction coil to which a high frequency current is supplied to generate an inductively coupled plasma in a region surrounding a space below the gas shower head; a negative voltage supply unit for applying a negative DC voltage to the gas shower head to allow an electric field induced by the induction coil to be drawn to a central portion in a processing region; and a unit for evacuating the processing chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A plasma processing method for processing a substrate by a plasma, comprising:
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mounting a substrate on a mounting table in a processing chamber; forming an electric field in a region surrounding a space below a gas shower head formed of a conductive material and disposed to face the mounting table by supplying a high frequency current to an induction coil positioned outwardly of the gas shower head in a diametrical direction of the processing chamber; supplying a processing gas into the processing chamber through gas injection openings formed at a bottom surface of the gas shower head to allow the processing gas to be converted into a plasma by the electric field; and applying a negative DC voltage to the gas shower head to allow the electric field induced by the induction coil to be drawn to the central portion of a processing region. - View Dependent Claims (10, 11, 12, 13)
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14. A plasma processing apparatus for processing a substrate by a plasma, comprising:
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a mounting table, provided in a processing chamber, for mounting thereon a substrate; a gas shower head formed of a conductive material provided to face the mounting table, the gas shower head having at a bottom surface a plurality of gas injection openings for supplying a processing gas into the processing chamber; a microwave supply unit to which microwaves are supplied to convert a processing gas into a plasma in a region surrounding a space below the gas shower head; a negative voltage supply unit for applying a negative DC voltage to the gas shower head to allow an electric field induced by the microwave to be drawn to a central portion of a processing region; and a unit for evacuating the processing chamber. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification