Plasma processing apparatus

Adhesive bonding and miscellaneous chemical manufacture – Differential fluid etching apparatus – With microwave gas energizing means

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20429831, 20429834, 20429837, C23F 102

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active

052717887

ABSTRACT:
A magnetron plasma etching apparatus comprises a suscepter serving as an electrode on which a silicon wafer is mounted. A carbon ring having an outer diameter larger than the diameter of the wafer and an electrical resistance lower than that of the wafer, is arranged around the suscepter. The carbon ring is electrically connected to the suscepter. The carbon ring improves uniformity of etching of the wafer.

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patent: 4572759 (1986-02-01), Benzing
patent: 4793975 (1988-12-01), Drage
patent: 4871420 (1989-10-01), Alexander, Jr. et al.
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patent: 4943361 (1990-07-01), Kakehi et al.
patent: 4968374 (1990-11-01), Tsukada et al.
patent: 5147497 (1992-09-01), Nozawa et al.
IBM Technical Disclosure Bulletin, vol. 30, No. 2, Jul. 1987, pp. 543-544, "Quartz Dielectric Cathode Ring Improves Etch Rate".
Patent Abstracts of Japan, vol. 13, No. 18, (E-704), Jan. 17, 1989, & JP-A-63 224 232, Sep. 19, 1988, Kakehi Yutaka, et al., "Plasma Treatment and Device Therefor".

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