US5323440A
Expired / Lapsed
US
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X-ray lithography apparatus including a dose detectable mask
Assignee: Canon Inc
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Filing: 1993-02-24
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Granted: 1994-06-21
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Expires: 2013-02-24
Abstract
Abstract An X-ray exposure apparatus using radiation light as exposure light, wherein the apparatus includes: a display device; a detecting device for detecting in each exposure the amount of exposure absorbed by a mask during the exposure; a memory for memorizing an accumulated dose of the mask; and a controller for causing the display device to display a dose of the mask, wherein the dose to be displayed corresponds to the sum of the accumulated dose memorized in the memory and the amount of exposure detected by the detecting device. Also a mask structure suitably usable in such an exposure apparatus.
Inventors
- 👤 Shinichi Hara
- 👤 Mitsuaki Amemiya
- 👤 Shunichi Uzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:24
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/22; G03F7/00; G03F7/70; G03F7/70483; G03F7/70491; G03F7/70541; G03F7/7055; G03F7/70558; G03F7/708; G03F7/70858; G03F7/70866; G03F7/70875
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
108 words
An X-ray exposure apparatus for exposing a mask with a radiation beam, said apparatus comprising: display means for displaying an exposure dose of the mask; detecting means for detecting the amount of exposure absorbed by the mask during each exposure; storing means comprising a semiconductor memory for memorizing an accumulated dose of the mask, said storing means being integrally provided on the mask; and control means for causing said display means to display the exposure does of the mask, wherein the dose to be displayed corresponds to a sum of he accumulated dose memorized in said storing means and the amount of exposure detected by said detecting means.
Claim 2
Dependent Claim
108 words
An X-ray exposure apparatus for exposing a mask with a radiation beam, said apparatus comprising: display means for displaying an exposure dose of the mask; detecting means for detecting the amount of exposure absorbed by the mask during each exposure; storing means comprising a semiconductor memory for memorizing an accumulated dose of the mask, said storing means being integrally provided on the mask; and control means for causing said display means to display the exposure does of the mask, wherein the dose to be displayed corresponds to a sum of he accumulated dose memorized in said storing means and the amount of exposure detected by said detecting means.
Claim 3
Dependent Claim
43 words
An apparatus according to claim 1, wherein said control means comprises means for comparing the sum of the accumulated dose and the detected exposure amount with an allowable level and means for causing said display means to display the result of the comparison.
Claim 4
Dependent Claim
48 words
An apparatus according to claim 2, further comprising mask changing means for effecting mask replacement, wherein, when the sum of the accumulated dose and the detected exposure amount is greater than the allowable level, said control means operates to cause said mask changing means to effect mask replacement.
Claim 5
Dependent Claim
63 words
A mask for use in an exposure apparatus, comprising: a mask frame; a mask pattern supported by said mask frame, said mask pattern being irradiated with a radiation beam when said mask is incorporated into the exposure apparatus; and data-rewritable type memory means for storing dose histories of the mask under radiation exposure, said memory means being formed integrally with said mask frame.
Claim 6
Dependent Claim
63 words
A mask for use in an exposure apparatus, comprising: a mask frame; a mask pattern supported by said mask frame, said mask pattern being irradiated with a radiation beam when said mask is incorporated into the exposure apparatus; and data-rewritable type memory means for storing dose histories of the mask under radiation exposure, said memory means being formed integrally with said mask frame.
Claim 7
Dependent Claim
98 words
A semiconductor device manufacturing exposure method, comprising the steps of: providing different masks each having a pattern to be transferred to a wafer; memorizing dose histories of the masks; selecting one of the masks; irradiating the selected mask with radiation so that the pattern thereof is transferred to the wafer; detecting a dose of the irradiated mask as a result of the irradiation thereof with the radiation; and renewing the memorized dose history of the irradiated mask on the basis of said detection of the dose, the dose history representing a change in a characteristic of that mask.
Claim 8
Dependent Claim
98 words
A semiconductor device manufacturing exposure method, comprising the steps of: providing different masks each having a pattern to be transferred to a wafer; memorizing dose histories of the masks; selecting one of the masks; irradiating the selected mask with radiation so that the pattern thereof is transferred to the wafer; detecting a dose of the irradiated mask as a result of the irradiation thereof with the radiation; and renewing the memorized dose history of the irradiated mask on the basis of said detection of the dose, the dose history representing a change in a characteristic of that mask.
Claim 9
Dependent Claim
85 words
A semiconductor device manufacturing exposure method, comprising the steps of: irradiating a mask and a wafer with radiation; detecting a dose of the mask resulting from the irradiation thereof with the radiation; renewing a dose history of the mask on the basis of the detected dose, the dose history representing a change in characteristics of the mask; and memorizing the renewed dose history of the mask, wherein said memorizing step comprises memorizing the dose history into a memory which is integrally provided on the mask.
Claim 10
Dependent Claim
85 words
A semiconductor device manufacturing exposure method, comprising the steps of: irradiating a mask and a wafer with radiation; detecting a dose of the mask resulting from the irradiation thereof with the radiation; renewing a dose history of the mask on the basis of the detected dose, the dose history representing a change in characteristics of the mask; and memorizing the renewed dose history of the mask, wherein said memorizing step comprises memorizing the dose history into a memory which is integrally provided on the mask.
Claim 11
Dependent Claim
86 words
An exposure apparatus for use with radiation including X-rays, said apparatus comprising: holding means for holding a mask selected from a plurality of different masks each having a pattern to be transferred to a substrate; an irradiating system for irradiating the mask held by said holding means with the radiation; memory means for memorizing dose histories of the different masks; and control means for renewing the dose history of the irradiated mask memorized in said memory means, in accordance with the irradiation thereof with the radiation.
Claim 12
Dependent Claim
86 words
An exposure apparatus for use with radiation including X-rays, said apparatus comprising: holding means for holding a mask selected from a plurality of different masks each having a pattern to be transferred to a substrate; an irradiating system for irradiating the mask held by said holding means with the radiation; memory means for memorizing dose histories of the different masks; and control means for renewing the dose history of the irradiated mask memorized in said memory means, in accordance with the irradiation thereof with the radiation.
Claim 13
Dependent Claim
99 words
An exposure apparatus for use with radiation including X-rays, said apparatus comprising: a mask frame for supporting a mask pattern to be transferred to a substrate; an irradiating system for irradiating the mask with the radiation; memory means for memorizing a history of doses of the mask with the radiation, wherein the dose history represents a change in characteristics of the mask; and control means for renewing the dose history memorized in said memory means in accordance with the irradiation of the mask with the radiation, wherein said memory means comprises a semiconductor memory provided on said mask frame.
Claim 14
Dependent Claim
99 words
An exposure apparatus for use with radiation including X-rays, said apparatus comprising: a mask frame for supporting a mask pattern to be transferred to a substrate; an irradiating system for irradiating the mask with the radiation; memory means for memorizing a history of doses of the mask with the radiation, wherein the dose history represents a change in characteristics of the mask; and control means for renewing the dose history memorized in said memory means in accordance with the irradiation of the mask with the radiation, wherein said memory means comprises a semiconductor memory provided on said mask frame.
Claim 15
Dependent Claim
14 words
An apparatus according to claim 8, wherein said control means comprises a radiation detector.
Claim 16
Dependent Claim
100 words
An exposure apparatus for use with radiation including X-rays, said apparatus comprising: a mask frame for supporting a mask pattern to be transferred to a substrate; an irradiating system for irradiating the mask with the radiation; memory means for memorizing a history of doses of the mask with the radiation, wherein the dose history represents a change in characteristics of the mask; and control means for renewing the dose history memorized in said memory means in accordance with the irradiation of the mask with the radiation, further comprising a code detector for detecting a code provided on said mask frame.
Claim 17
Dependent Claim
100 words
An exposure apparatus for use with radiation including X-rays, said apparatus comprising: a mask frame for supporting a mask pattern to be transferred to a substrate; an irradiating system for irradiating the mask with the radiation; memory means for memorizing a history of doses of the mask with the radiation, wherein the dose history represents a change in characteristics of the mask; and control means for renewing the dose history memorized in said memory means in accordance with the irradiation of the mask with the radiation, further comprising a code detector for detecting a code provided on said mask frame.
Claim 18
Dependent Claim
14 words
An apparatus according to claim 10, wherein said control means comprises a radiation detector.
Claim 19
Dependent Claim
98 words
An exposure apparatus for use with radiation including X-rays, said apparatus comprising: a mask frame for supporting a mask pattern to be transferred to a substrate; an irradiating system for irradiating the mask with the radiation; memory means for memorizing a history of doses of the mask with the radiation, wherein the dose history represents a change in characteristics of the mask; and control means for renewing the dose history memorized in said memory means in accordance with the irradiation of the mask with the radiation, further comprising a display for displaying information related to the dose history.
Claim 20
Dependent Claim
98 words
An exposure apparatus for use with radiation including X-rays, said apparatus comprising: a mask frame for supporting a mask pattern to be transferred to a substrate; an irradiating system for irradiating the mask with the radiation; memory means for memorizing a history of doses of the mask with the radiation, wherein the dose history represents a change in characteristics of the mask; and control means for renewing the dose history memorized in said memory means in accordance with the irradiation of the mask with the radiation, further comprising a display for displaying information related to the dose history.
Claim 21
Dependent Claim
25 words
An apparatus according to claim 12, further comprising mask changing means for effecting mask replacement in accordance with the information related to the dose history.
Claim 22
Dependent Claim
60 words
A mask usable in an exposure apparatus, comprising: a mask frame; a mask pattern supported by said mask frame, said mask pattern being irradiated with a radiation beam when said mask is incorporated into the exposure apparatus; and memory means for storing exposure information of the mask under radiation exposure, said memory means being formed integrally with said mask frame.
Claim 23
Dependent Claim
60 words
A mask usable in an exposure apparatus, comprising: a mask frame; a mask pattern supported by said mask frame, said mask pattern being irradiated with a radiation beam when said mask is incorporated into the exposure apparatus; and memory means for storing exposure information of the mask under radiation exposure, said memory means being formed integrally with said mask frame.
Claim 24
Dependent Claim
102 words
A semiconductor device manufactured by an exposure method which comprises the steps of: providing different masks each having a pattern to be transferred to a wafer; memorizing dose histories of the masks; selecting one of the masks; irradiating the selected mask with radiation so that the pattern thereof is transferred to the wafer; detecting a dose of the irradiated mask as a result of the irradiation thereof with the radiation; and renewing the memorized dose history of the irradiated mask on the basis of the said detection of the dose, the dose history representing a change in a characteristic of the mask.
Claim 25
Dependent Claim
102 words
A semiconductor device manufactured by an exposure method which comprises the steps of: providing different masks each having a pattern to be transferred to a wafer; memorizing dose histories of the masks; selecting one of the masks; irradiating the selected mask with radiation so that the pattern thereof is transferred to the wafer; detecting a dose of the irradiated mask as a result of the irradiation thereof with the radiation; and renewing the memorized dose history of the irradiated mask on the basis of the said detection of the dose, the dose history representing a change in a characteristic of the mask.
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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) | 1997-06-20 | 1997-12-20 | 1998-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-20 | 2001-12-20 | 2002-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-20 | 2005-12-20 | 2006-06-21 | $7700.00 | Window Closed / Lapsed |