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US4902934A Expired / Lapsed US ⏱️ 0.0 years remaining

Plasma apparatus

Assignee: Nippon Steel Corp
•
Filing: 1988-05-10
•
Granted: 1990-02-20
•
Expires: 2008-05-10
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Abstract

Abstract A plasma apparatus which is; provided with a pair of plasma generation chambers at both sides of a specimen chamber provided therein with two specimen mounts for fixing specimens to be subjected to the predetermined processing such as plasma CVD; designed to use the specimen chamber in common so as to simultaneously process by plasma generated by the pair of plasma generation chambers the specimens fixed to the two specimen mounts to thereby be compact as a whole; and provided with a load lock chamber communicated with the specimen chamber and delivering the specimens between the load lock chamber and specimen chamber, so that the plurality of specimens are contained in cassettes disposed in the load lock chamber and the contained specimens are moved between the load lock chamber and the specimen chamber by means of a loader provided in the load lock chamber, thereby enabling a rest time to be reduced and the specimen to be efficiently processed.

Inventors

  • 👤 Tadashi Miyamura
  • 👤 Shigeo Sugawara

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 13:49
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/32431; H01J37/32715; H01J37/32724; H10; H10P; H10P72/00; H10P72/30; H10P72/33; H10P72/3308; H01J37/32009; H01J37/32018; H01J37/32192; H01J37/32201; H01J37/3266; H01J37/32678; H10P72/04; H10P72/0402; H10P72/0418; H10P72/0421; H10P72/0451; H10P72/0462; H10P72/0464; H10P72/0468; H10P72/34; H10P72/3402; H10P72/3411; H10P72/70; H10P72/72; H10P72/722

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 81 words
A plasma apparatus comprising; a pair of plasma generation chambers for generating plasma by electron cyclotron resonance excitation utilizing microwaves; a specimen chamber being provided at both sides thereof with said plasma generation chambers opposite to each other and at the facing positions at both side walls thereof with plasma extraction windows facing said plasma generation chambers; and a pair of specimen mounts disposed in said specimen chamber, oriented reversely to each other, and opposite to said plasma extraction windows respectively.
Claim 2
Dependent Claim 81 words
A plasma apparatus comprising; a pair of plasma generation chambers for generating plasma by electron cyclotron resonance excitation utilizing microwaves; a specimen chamber being provided at both sides thereof with said plasma generation chambers opposite to each other and at the facing positions at both side walls thereof with plasma extraction windows facing said plasma generation chambers; and a pair of specimen mounts disposed in said specimen chamber, oriented reversely to each other, and opposite to said plasma extraction windows respectively.
Claim 3
Dependent Claim 61 words
A plasma apparatus as set forth in claim 1, further comprising a load lock chmber communicating with said specimen chamber through communicating conduits provided at one side wall of said specimen chamber not-opposite to said plasma extraction windows thereat and being provided therein with means for containing therein a plurality of specimens to be supplied to each of said specimen mounts.
Claim 4
Dependent Claim 38 words
A plasma apparatus as set forth in claim 2, wherein said specimen chamber comprises a first transport means for holding said specimen supplied from said load lock chamber and transporting said specimen to each of said specimen mounts.
Claim 5
Dependent Claim 43 words
A plasma apparatus as set forth in claim 1, wherein each of said specimen mounts comprises holding means for fixing said specimen by electrostatic attraction, cooling means for cooling said speciment by use of cooling water, and heating means for heating said specimen.
Claim 6
Dependent Claim 70 words
A plasma apparatus as set forth in claim 3, wherein said load lock chamber comprises a pair of cassettes containing therein said plurality of specimens and corresponding to said pair of specimen mounts respectively, a moving means for simultaneously moving each of said cassettes at every interval of said contained specimens, and a second transport means for delivering said specimen between each of said cassettes and said first transport means.

References Cited (Backward Citations)

US4550239A Cited
US4724300A Cited
US4668365A Cited
US4641060A Cited
US4713585A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-02-19 1993-08-21 1994-02-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-02-19 1997-08-21 1998-02-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-02-19 2001-08-21 2002-02-20 $7700.00 Window Closed / Lapsed

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