Plasma processing apparatus with a rotating electromagnetic field
First Claim
1. A plasma process apparatus comprising:
- a process container having a peripheral wall, an upper end wall, a lower end wall, and a process chamber surrounded by the walls;
means for supporting an object to be processed having a processed surface in the process chamber;
means for feeding a process gas into the process chamber; and
induction means arranged outside the process container and applying a high-frequency power to form in the process chamber an induction field rotating in synchronism with the high-frequency power along a plane substantially parallel to the processed surface and to supply electromagnetic waves, thereby generating a plasma of the process gas, when a high-frequency voltage is applied thereto.
1 Assignment
0 Petitions
Accused Products
Abstract
A plasma process apparatus includes a high-vacuum container in which a semiconductor wafer is horizontally mounted on a susceptor, and into which a process gas such as an etching gas is supplied. Between the susceptor and the container a high-frequency voltage is applied. Around the outer periphery of the container, four high-frequency coils are arranged at given intervals in a circumferential direction. The coils apply a high-frequency power having phase difference of π/2 between the adjacent coils, into the container, so that a high-frequency rotating electromagnetic field rotating on a horizontal plane is formed in the container thereby generating a plasma of the process gas. The surface of the semiconductor wafer is processed by the plasma.
143 Citations
11 Claims
-
1. A plasma process apparatus comprising:
-
a process container having a peripheral wall, an upper end wall, a lower end wall, and a process chamber surrounded by the walls; means for supporting an object to be processed having a processed surface in the process chamber; means for feeding a process gas into the process chamber; and induction means arranged outside the process container and applying a high-frequency power to form in the process chamber an induction field rotating in synchronism with the high-frequency power along a plane substantially parallel to the processed surface and to supply electromagnetic waves, thereby generating a plasma of the process gas, when a high-frequency voltage is applied thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A plasma process apparatus comprising:
-
a process container containing at least one object to be processed having a processed surface; induction means adapted to form in the process container an electromagnetic field rotating along a plane substantially parallel to the processed surface and to supply electromagnetic waves, therein generating plasma of the process gas, when a high-frequency voltage is applied thereto; and means for reducing the pressure in the process container to 0.005 Tort during processing. - View Dependent Claims (10, 11)
-
Specification