Patent US4475573A successfully refreshed from Google Patents.
Patent US5584973A successfully refreshed from Google Patents.
US5584973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing apparatus with an invertible collimator and a processing method therefor
Assignee: Tokyo Electron Ltd
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Filing: 1995-06-06
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Granted: 1996-12-17
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Expires: 2015-06-06
Abstract
Abstract A processing apparatus wherein a collimator which restricts sputtering directions of sputtered particles from a target comprises a plurality of slats arranged substantially parallel with each other. The respective slats constitute a louver mechanism in which rotatable rods are rotated to replace the side thereof facing the target and the side thereof facing the object-to-be-processed with each other. Because of the louver mechanism, the portion of the interior of a processing vessel belonging to the target and the portion thereof belonging to the object-to-be processed can be closed off from each other, and a side of the collimator facing the target and a side thereof facing the object-to-be-processed can be replaced with each other. As a result, the collimator has also a shutter function, and can suppress generation of particles.
Inventors
- 👤 Yuichi Wada
- 👤 Jiro Katsuki
- 👤 Hiroshi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:15
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/34; H01J37/3411; H01J37/3447; C; C23; C23C; C23C14/00; C23C14/22; C23C14/34; C23C14/56; C23C14/568
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
82 words
A processing apparatus comprising a sputtering target arranged in a processing vessel so as to be opposed to an object to be processed; and a collimator arranged opposed to the target for restricting the directions of sputtered particles from the target so as to adhere the sputtered particles to the object to be processed, the collimator including reversing means which can reverse the collimator to replace a side thereof facing the target and a side thereof facing the object-to-be-processed with each other.
Claim 2
Dependent Claim
82 words
A processing apparatus comprising a sputtering target arranged in a processing vessel so as to be opposed to an object to be processed; and a collimator arranged opposed to the target for restricting the directions of sputtered particles from the target so as to adhere the sputtered particles to the object to be processed, the collimator including reversing means which can reverse the collimator to replace a side thereof facing the target and a side thereof facing the object-to-be-processed with each other.
Claim 3
Dependent Claim
54 words
The processing apparatus according to claim 1, wherein the collimator comprises a plurality of slats arranged substantially parallel with each other, the respective slats constituting a louver mechanism in which rotatable rods are rotated to replace the side thereof facing to the target and the side thereof facing to the object-to-be-processed with each other.
Claim 4
Dependent Claim
37 words
The processing apparatus according to claim 2, wherein a plurality of sets of substantially parallel slats are arranged in a plurality of stages, each set being oriented in a direction different from that of its adjacent set.
Claim 5
Dependent Claim
17 words
The processing apparatus according to claim 2, wherein a plurality of substantially parallel slats have comb teeth.
Claim 6
Dependent Claim
55 words
The processing apparatus according to claim 2, wherein the respective slats are capable of passing through a shielding position where the respective slats close off the portion of the interior of the processing vessel belonging to the target from the portion thereof belonging to the object-to-be processed, being reversed, and stopped at the shielding position.
Claim 7
Dependent Claim
27 words
The processing apparatus according to claim 1, wherein the processing apparatus is a sputtering system which alternately conducts sputtering of titanium and reactive sputtering of titanium nitride.
Claim 8
Dependent Claim
73 words
A processing method comprising the steps of positioning an object-to-be-processed in a processing vessel, opposed to a sputtering target, and restricting the directions of particles sputtered from the target by a collimator opposed to the target, whereby the sputtered particles are adhered to the object-to-be-processed, the collimator being rotated at a set timing to replace the side of the collimator facing the target and the side thereof facing the object-to-be-processed with each other.
Claim 9
Dependent Claim
73 words
A processing method comprising the steps of positioning an object-to-be-processed in a processing vessel, opposed to a sputtering target, and restricting the directions of particles sputtered from the target by a collimator opposed to the target, whereby the sputtered particles are adhered to the object-to-be-processed, the collimator being rotated at a set timing to replace the side of the collimator facing the target and the side thereof facing the object-to-be-processed with each other.
Claim 10
Dependent Claim
32 words
The processing method according to claim 7, wherein sputtering is conducted with the collimator being in the form of a plurality of slats kept at a shielding position at a set timing.
Claim 11
Dependent Claim
35 words
The processing method according to claim 8, wherein the slats are kept at the shielding position at the beginning of sputtering, and the slats are further rotated to be opened after sputtering has become stable.
Claim 12
Dependent Claim
49 words
The processing method according to claim 8, wherein when sputtering of titanium follows reactive sputtering of titanium nitride, the sputtering is conducted for a required period of time with the slats kept at the shielding position, and then the respective slats are further rotated so as to be opened.
Claim 13
Dependent Claim
25 words
The processing method according to claim 7, wherein the set timing is a set time cycle or a set number of objects to be processed.
Claim 14
Dependent Claim
34 words
The processing method according to claim 7, wherein the set timing is a time when a counted value read by a particle counter provided in the processing apparatus has exceeded a set threshold value.
References Cited (Backward Citations)
JPH0432568A
Cited
JPH04193948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-17 | 2000-06-17 | 2000-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-17 | 2004-06-17 | 2004-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-17 | 2008-06-17 | 2008-12-17 | $7700.00 | Window Closed / Lapsed |