Patent US6124081A successfully refreshed from Google Patents.
US6124081A
Expired / Lapsed
US
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Method of forming a resist pattern
Assignee: Mitsubishi Electric Corp
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Filing: 1997-10-07
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Granted: 2000-09-26
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Expires: 2017-10-07
Abstract
Abstract A negative type resist in which an alkali-soluble base resin, a crosslinking agent and an acid generating agent are dissolved in a solvent, wherein 10 through 50 wt % of the crosslinking agent and 0.5 through 20 wt % of the acid generating agent on the basis of 100 wt % of the alkali-soluble base resin are dissolved in the solvent.
Inventors
- 👤 Shinji Kishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:19
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/20; G03F7/2022; G03F7/0045
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
180 words
A method of forming a resist pattern comprising: a step of forming a resist layer, on a surface of a substrate by coating the negative resist on the surface of the substrate and by prebaking the negative resist, said negative resist becoming slightly soluble or insoluble to the developer when a chemical change is caused to a substance generated by receiving a radiation such as a light beam or an electron beam by baking, or when a chemical change is caused in a substance by receiving the radiation; a total face irradiation step for irradiating the radiation on a total of the surface of the resist layer through an opaque reticle; a selective irradiation step for irradiation the radiation on the surface of the resist layer through a reticle formed with a desired pattern; and a step of providing a resist pattern by developing the resist layer irradiated with the radiation in the total face irradiation step and the selective irradiation step by the developer, wherein the total face irradiation and the selective irradiation are performed at the same wavelength.
Claim 2
Independent Claim
180 words
A method of forming a resist pattern comprising: a step of forming a resist layer, on a surface of a substrate by coating the negative resist on the surface of the substrate and by prebaking the negative resist, said negative resist becoming slightly soluble or insoluble to the developer when a chemical change is caused to a substance generated by receiving a radiation such as a light beam or an electron beam by baking, or when a chemical change is caused in a substance by receiving the radiation; a total face irradiation step for irradiating the radiation on a total of the surface of the resist layer through an opaque reticle; a selective irradiation step for irradiation the radiation on the surface of the resist layer through a reticle formed with a desired pattern; and a step of providing a resist pattern by developing the resist layer irradiated with the radiation in the total face irradiation step and the selective irradiation step by the developer, wherein the total face irradiation and the selective irradiation are performed at the same wavelength.
Claim 3
Dependent Claim
23 words
The method of forming a resist pattern according to claim 1, wherein a light transmittance of the opaque reticle is 5 through 15%.
Claim 4
Dependent Claim
30 words
The method of forming a resist pattern according to claim 1, wherein the total face irradiation step and the selective irradiation step are carried out by a same exposure device.
Claim 5
Dependent Claim
26 words
The method of forming a resist pattern according to claim 1, wherein the total face irradiation step is carried out prior to the selective irradiation step.
Claim 6
Dependent Claim
33 words
The method of forming a resist pattern according to claim 1, wherein an alkali-soluble base resin, a crosslinking agent and an acid generating agent are dissolved in a solvent in the negative resist.
Claim 7
Dependent Claim
39 words
The method of forming a resist pattern according to claim 5, further comprising: a step of baking the resist layer after the total face irradiation step; and a step of baking the resist layer after the selective irradiation step.
Claim 8
Independent Claim
186 words
A method of forming a resist pattern comprising: a step of forming a resist layer comprising a negative resist on a surface of a substrate by coating the negative resist on the surface of the substrate and by prebaking the negative resist, said negative resist becoming slightly soluble or insoluble to a developer when a chemical change is caused in a substance generated by receiving a radiation such as a light beam or an electron beam by baking; a total face irradiation and baking step for irradiating the radiation on a total of a surface of the resist layer through an opaque reticle and baking the resist layer thereafter; a selective irradiation and baking step for irradiating the radiation on the surface of the resist layer through a reticle formed with a desired pattern and baking the resist layer thereafter; a step of providing a resist pattern by developing the resist layer irradiated with the radiation in the total face irradiation and baking step and the selective irradiation and baking step, wherein the total face irradiation and the selective irradiation are performed at the same wavelength.
Claim 9
Independent Claim
186 words
A method of forming a resist pattern comprising: a step of forming a resist layer comprising a negative resist on a surface of a substrate by coating the negative resist on the surface of the substrate and by prebaking the negative resist, said negative resist becoming slightly soluble or insoluble to a developer when a chemical change is caused in a substance generated by receiving a radiation such as a light beam or an electron beam by baking; a total face irradiation and baking step for irradiating the radiation on a total of a surface of the resist layer through an opaque reticle and baking the resist layer thereafter; a selective irradiation and baking step for irradiating the radiation on the surface of the resist layer through a reticle formed with a desired pattern and baking the resist layer thereafter; a step of providing a resist pattern by developing the resist layer irradiated with the radiation in the total face irradiation and baking step and the selective irradiation and baking step, wherein the total face irradiation and the selective irradiation are performed at the same wavelength.
Claim 10
Dependent Claim
23 words
The method of forming a resist pattern according to claim 7, wherein a light transmittance of the opaque reticle is 5 through 15%.
Claim 11
Dependent Claim
46 words
The method of forming a resist pattern according to claim 7, wherein the irradiation of the radiation in the total face irradiation and baking step and the irradiation of the radiation in the selective irradiation and baking step are carried out by a same exposure device.
Claim 12
Dependent Claim
30 words
The method of forming a resist pattern according to claim 7, wherein the total face irradiation and baking step is carried out prior to the selective irradiation and baking step.
Claim 13
Dependent Claim
33 words
The method of forming a resist pattern according to claim 7, wherein an alkali-soluble base resin, a crosslinking agent and an acid generating agent are dissolved in a solvent in the negative resist.
Claim 14
Independent Claim
178 words
A method of forming a resist pattern comprising: a step of forming a resist layer comprising a negative resist on a surface of a substrate by coating the negative resist on the surface of the substrate and prebaking the negative resist, said negative resist becoming slightly soluble or insoluble to a developer when a chemical change is caused in a substance generated by receiving a radiation such as a light beam or an electron beam by baking or when a chemical change is caused in a substance by receiving the irradiation; a total face irradiation step for irradiating the radiation on a total of a surface of the resist layer, a selective irradiation step for irradiation the radiation on the surface of the resist layer through a reticle formed with a desired pattern; a step of providing a resist pattern by developing the resist layer irradiated with the radiation in the total face irradiation step and the selective irradiation step by the developer, wherein the total face irradiation and the selective irradiation are performed at the same wavelength.
Claim 15
Independent Claim
178 words
A method of forming a resist pattern comprising: a step of forming a resist layer comprising a negative resist on a surface of a substrate by coating the negative resist on the surface of the substrate and prebaking the negative resist, said negative resist becoming slightly soluble or insoluble to a developer when a chemical change is caused in a substance generated by receiving a radiation such as a light beam or an electron beam by baking or when a chemical change is caused in a substance by receiving the irradiation; a total face irradiation step for irradiating the radiation on a total of a surface of the resist layer, a selective irradiation step for irradiation the radiation on the surface of the resist layer through a reticle formed with a desired pattern; a step of providing a resist pattern by developing the resist layer irradiated with the radiation in the total face irradiation step and the selective irradiation step by the developer, wherein the total face irradiation and the selective irradiation are performed at the same wavelength.
Claim 16
Dependent Claim
30 words
The method of forming a resist pattern according to claim 12, wherein the total face irradiation step and the selective irradiation step are carried out by a same exposure device.
Claim 17
Dependent Claim
26 words
The method of forming a resist pattern according to claim 12, wherein the total face irradiation step is carried out prior to the selective irradiation step.
Claim 18
Dependent Claim
33 words
The method of forming a resist pattern according to claim 12, wherein an alkali-soluble base resin, a crosslinking agent and an acid generating agent are dissolved in a solvent in the negative resist.
Claim 19
Dependent Claim
39 words
The method of forming a resist pattern according to claim 15 further comprising: a step of baking the resist layer after the total face irradiation step; and a step of baking the resist layer after the selective irradiation step.
Claim 20
Independent Claim
155 words
A method of forming a resist pattern comprising: a step of forming a resist layer comprising a negative resist on a surface of a substrate by coating the negative resist on the surface of the substrate and prebaking the negative resist, said negative resist becoming slightly soluble or insoluble to a developer comprising an aqueous alkaline solution when a chemical change is caused in a substance generated by receiving a radiation such as a light beam or an electron beam by baking or when a chemical change is caused in a substance by receiving the irradiation; an irradiation step for irradiating the radiation on a surface of the resist through a reticle formed with a desired pattern comprising a light transmitting region and a light shielding layer having a finite light transmittance; and a step of providing a resist pattern by developing the resist layer irradiated with the radiation in the irradiation step by developer.
Claim 21
Independent Claim
155 words
A method of forming a resist pattern comprising: a step of forming a resist layer comprising a negative resist on a surface of a substrate by coating the negative resist on the surface of the substrate and prebaking the negative resist, said negative resist becoming slightly soluble or insoluble to a developer comprising an aqueous alkaline solution when a chemical change is caused in a substance generated by receiving a radiation such as a light beam or an electron beam by baking or when a chemical change is caused in a substance by receiving the irradiation; an irradiation step for irradiating the radiation on a surface of the resist through a reticle formed with a desired pattern comprising a light transmitting region and a light shielding layer having a finite light transmittance; and a step of providing a resist pattern by developing the resist layer irradiated with the radiation in the irradiation step by developer.
Claim 22
Dependent Claim
44 words
The method of forming a resist pattern according to claim 17, wherein a dissolution rate of the surface layer of the resist layer with respect to the developer after the resist layer forming step and before the irradiation step is 3,000 Å/sec or more.
Claim 23
Dependent Claim
33 words
The method of forming a resist pattern according to claim 17, wherein an alkali-soluble base resin, a crosslinking agent and an acid generating agent are dissolved in a solvent in the negative resist.
Claim 24
Dependent Claim
46 words
The method of forming a resist pattern according to claim 17, wherein the light shielding layer of the reticle is a phase shifter layer for transmitting the radiation having a first phase different from a second phase of the radiation transmitting through the light transmitting region.
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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) | 2003-09-26 | 2004-03-27 | 2004-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-09-26 | 2008-03-27 | 2008-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-09-26 | 2012-03-27 | 2012-09-26 | $7700.00 | Window Closed / Lapsed |