Patent US5316645A successfully refreshed from Google Patents.
US5316645A
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US
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Plasma processing apparatus
Assignee: Canon Inc
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Filing: 1993-02-17
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Granted: 1994-05-31
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Expires: 2013-02-17
Abstract
Abstract A plasma processing apparatus comprises: a first electrode connectable with a plasma generating power source; a second electrode capable of supporting a substrate to be subjected to a plasma-involving surface treatment; a third electrode enclosing a space between the first and second electrodes, all the electrodes being positioned in an evacuatable chamber; and potential control means for controlling the potential of the third electrode.
Inventors
- 👤 Atsushi Yamagami
- 👤 Nobuyuki Okamura
- 👤 Tadahiro Ohmi
- 👤 Haruhiro H. Goto
- 👤 Tadashi Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:15
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/34; C23C14/3435; C23C14/345; C23C14/35; C23C16/00; C23C16/44; C23C16/50; C23C16/505; C23C16/509; H; H01; H01J; H01J37/00; H01J37/32; H01J37/32431; H01J37/32697; H01J37/34; H01J37/3402; H01J37/3405; H01J2237/00; H01J2237/32; H01J2237/33; H01J2237/332
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A plasma processing apparatus comprising: a first electrode connectable with a plasma generating power source; a second electrode capable of supporting a substrate to be subjected to a plasma-involving surface treatment; a third electrode divided into plural portions enclosing a space between said first and second electrodes and having separate potentials applied to said plural portions all said electrodes being positioned in an evacuatable chamber; and potential control means for independently controlling the potentials of said third electrode.
Claim 2
Dependent Claim
78 words
A plasma processing apparatus comprising: a first electrode connectable with a plasma generating power source; a second electrode capable of supporting a substrate to be subjected to a plasma-involving surface treatment; a third electrode divided into plural portions enclosing a space between said first and second electrodes and having separate potentials applied to said plural portions all said electrodes being positioned in an evacuatable chamber; and potential control means for independently controlling the potentials of said third electrode.
Claim 3
Dependent Claim
41 words
An apparatus according to claim 1, wherein said first electrode is constructed as to support a target, and said apparatus is adapted to form a film with a material supplied from said target, on the substrate supported by said second electrode.
Claim 4
Dependent Claim
17 words
An apparatus according to claim 1, wherein said third electrode is electrically insulated from said evacuatable chamber.
Claim 5
Dependent Claim
21 words
An apparatus according to claim 3, wherein said third electrode is connected through a DC power source to the evacuatable chamber.
Claim 6
Dependent Claim
16 words
An apparatus according to claim 1, wherein said evacuatable chamber serves also as said third electrode.
Claim 7
Dependent Claim
18 words
An apparatus according to claim 1, wherein said second electrode is connected to a high frequency power source.
Claim 8
Dependent Claim
35 words
An apparatus according to claim 6, wherein the frequency of the high frequency power source connected to said second electrode is different from that of the plasma generating power source connected to said first electrode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |