Global to push GA events into
skip to main content

Title: Coupled microwave ECR and radio-frequency plasma source for plasma processing

In a dual plasma device, the first plasma is a microwave discharge having its own means of plasma initiation and control. The microwave discharge operates at electron cyclotron resonance (ECR), and generates a uniform plasma over a large area of about 1000 cm[sup 2] at low pressures below 0.1 mtorr. The ECR microwave plasma initiates the second plasma, a radio frequency (RF) plasma maintained between parallel plates. The ECR microwave plasma acts as a source of charged particles, supplying copious amounts of a desired charged excited species in uniform manner to the RF plasma. The parallel plate portion of the apparatus includes a magnetic filter with static magnetic field structure that aids the formation of ECR zones in the two plasma regions, and also assists in the RF plasma also operating at electron cyclotron resonance. 4 figures.
Inventors:
;
Issue Date:
OSTI Identifier:
5017678
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; EDB-94-077888
Patent Number(s):
US 5292370; A
Application Number:
PPN: US 7-930590
Contract Number:
AC05-84OR21400
Resource Relation:
Patent File Date: 14 Aug 1992
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; PLASMA PRODUCTION; MICROWAVE RADIATION; ELECTRIC DISCHARGES; ELECTRON CYCLOTRON-RESONANCE; MICROWAVE EQUIPMENT; USES; CYCLOTRON RESONANCE; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; EQUIPMENT; RADIATIONS; RESONANCE; 661300* - Other Aspects of Physical Science- (1992-)