WO2004031858A2 - Resistsystem, verwendung eines resistsystems und lithographieverfahren zur herstellung von halbleiterbauelementen - Google Patents
Resistsystem, verwendung eines resistsystems und lithographieverfahren zur herstellung von halbleiterbauelementen Download PDFInfo
- Publication number
- WO2004031858A2 WO2004031858A2 PCT/DE2003/003178 DE0303178W WO2004031858A2 WO 2004031858 A2 WO2004031858 A2 WO 2004031858A2 DE 0303178 W DE0303178 W DE 0303178W WO 2004031858 A2 WO2004031858 A2 WO 2004031858A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resist system
- resist
- iodonium
- exposure
- lithography
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
- G03F7/2004—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image characterised by the use of a particular light source, e.g. fluorescent lamps or deep UV light
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/0045—Photosensitive materials with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
- G03F7/0392—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition
Definitions
- Resist system use of a resist system and lithography process for the production of semiconductor components
- the invention relates to a resist system according to the preamble of claim 1, a use of a resist system according to claim 13 and a lithography method according to the preamble of claim 14.
- CAR chemical amplification resists
- the resists can work on the principle of acid catalytic cleavage.
- a polar carboxylic acid group is formed from a non-polar chemical group, for example a carboxylic acid tert-butyl ester group, in the presence of a photolytically generated acid (Photo Acid Generator: PAG; photo acid generator).
- Added bases can affect the diffusion length of the photo acid produced, which affects both
- the exposed resist film is treated with aqueous alkaline developer solutions, the carbonic acid-rich, polar areas are developed away and the unexposed resist areas remain.
- Resist materials that can resolve structures down to 65 nm in size will likely be required to manufacture DRAMs by 2007. For the year 2016, even a resolution of 22 nm DRAM 1/2 pitch will be necessary. With the currently used exposure wavelengths of 248 or 193 nm or also with the future wavelength of 157 nm, these structures can no longer be generated. For future generations of lithography, optical lithography will therefore advance into the extremely short-wave range of approximately 13 nm (EUV) or even into the X-ray range.
- EUV extremely short-wave range
- the present invention has for its object to provide a resist system and a lithography method, with which a high sensitivity is provided in particular in the EUV range, but at the same time there is no restriction of the process window due to undesired crosslinking in the resist system even at high exposure doses.
- a resist system with the features of claim 1.
- Structuring at wavelengths in the range from 0.1 to 150 nm can surprisingly be carried out with at least one polymer or copolymer with at least one acid-labile group.
- the acid labile groups become under catalytic Action cleaved by acid and release polar groups, which then increase the solubility of the polymer / copolymer in developers, for example aqueous alkaline developers.
- At least one acid-labile group is an ester group or a lactone group.
- a substrate can be structured even without chemical reinforcing agents in a lithography process with wavelengths in the range from 0.1 to 150 nm.
- the resist system according to the invention has a large process window since, even at high exposure doses, no crosslinking occurs, which leads to an insolubility of the resist. Even if one generally strives to use small exposure doses, the resist system according to the invention is less sensitive to fluctuations in the exposure due to the large process window.
- methacrylate segment It is particularly advantageous if a t-butyl methacrylate and / or a 2-ethoxyethyl methacrylate is used as the methacrylate segment.
- the sensitivity of the resist system can be improved if an iodine-containing and / or sulfur-containing photoacid generator is used as a chemical reinforcing agent.
- At least one photoacid generator advantageously has an iodonium compound. It is particularly advantageous if at least one photoacid generator contains a di (tert-butylphenyl) iodonium triflate, di (tert-butylphenyl) iodonium hexaflate, di (tert-butylphenyl) iodonium nonaflate, diphenyliodonium triflate, diphenyliodonium hexaflate or diphenyliodonium nonaflate.
- At least one photo acid generator has a sulfonium compound, in particular a triphenylsulfonium triflate, triphenylsulfonium hexaflate or triphenylsulfonium nonaflate.
- the resist system according to the invention advantageously has a proportion of silicon, which leads to improved etching stability. It is particularly advantageous if the silicon can be introduced into the resist system in the form of a compound having a polymerizable carbon-carbon bond, in particular a trimethylalylsilane.
- the object is also achieved by using the resist system and a method in which a resist system according to at least one of claims 1 to 12 is used.
- the sensitivity is increased if a resist system with a chemical reinforcing agent which contains at least one iodine and / or sulfur-containing photo acid generator is used in the process according to the invention.
- the exposure dose in the lithography process according to the invention can be between 0.1 and 300 mJ / cm 2 . Even massive overexposure (e.g. by a factor of 250) does not lead to crosslinking of the polymer in the resist system. It is particularly advantageous if the exposure dose during exposure is between 0.5 and 10 mJ / cm 2 .
- the method according to the invention can be carried out at a wavelength of 0.1 to 150 nm. This covers the EUV range up to the X-ray range. It is particularly advantageous to use a wavelength of 13.4 nm.
- a polymer is part of the
- Resist system the polarity of which can be specifically changed.
- a polymer that can then be used alone or together with photo acid generators as the resist system according to the invention.
- the polymer is synthesized using radical polymerization. To do this
- the reaction solution is allowed to cool to room temperature and 35.0 g (27.5 ml) of 2-propanol are added with vigorous stirring.
- the solution obtained is dissolved in a solution of 10.5 g (13.1 ml) 2-butanone, 337.0 g (429 ml) 2-propanol and 329.0 g (329, 0 ml) of water.
- the polymer precipitates as a fine, white powder.
- the mixture is left to stir for a further 30 minutes and then the solvent is filtered off under a slightly reduced pressure over a G3 frit.
- the white precipitate is washed with a solution of 16.0 g (20.0 ml) 2-butanone, 111.0 g (141 ml) 2-propanol and 100.0 g (100 ml) water and for 72 hours at 80 ° C dried in a high vacuum. About 38 g (75% of theory) of fine, white powder are obtained as the reaction product.
- the analysis can be carried out by means of NMR, GPC or DSC.
- a section of a structure is shown below as an example of a silicon-containing polymer of the resist system according to the invention:
- a silicon-free polymer can be used:
- the resist system is spun onto a silicon wafer (wafer) at 1000-5000 rpm and baked for 90 s at 130 ° C (PAB).
- the layer thickness of the resist system after spin-coating at 3000 rpm is approximately 110 nm.
- the exposure is carried out with EUV light of the wavelength 13.4 nm.
- the exposure dose D 0 is 36.8 mj / cm 2 .
- iodonium compounds have a structure (IR 2 ) X, where R is an organic radical, in particular can be an aryl group. X is a hydroxy group or a monovalent acid residue. Possible structures are, for example:
- Straight or branched alkyl groups such as —CH 3 , C 2 H 5 , isopropyl or, for example, can serve as substituents R.
- the substituents R can be identical or identical to one another.
- the resist system is spun onto a silicon wafer (wafer) at 1000-5000 rpm and baked for 90 s at 130 ° C (PAB).
- the layer thickness of the resist system is approximately 110 nm after spinning on at 3000 rpm.
- the exposure is carried out with EUV light of the wavelength 13.4 nm.
- the exposure dose D 0 is 1.4 mj / cm 2 .
- the development takes place in a 2.38%
- Tetramethylammonium hydroxide solution then the wafer is rinsed with distilled water and dried.
- a second embodiment of the resist system according to the invention is thus produced.
- the photo acid generator can also have sulfonium compounds which basically have the form [R 3 S] + X ⁇ .
- sulfonium compounds which basically have the form [R 3 S] + X ⁇ .
- a possible structure is, for example, a triphenyl sulfonium (TPS):
- aromatic components may also have the substituents R listed in the example above.
- a third exemplary embodiment of the resist system according to the invention is carried out analogously to Example 2, but triphenylsulfonium nonaflate [Ph 3 S + , CF 3 (CF 2 ) 3 S0 3 ⁇ ] is used instead of di (tert-butylphenyl) iodonium hexaflate as the photoacid generator.
- the exposure dose is 2.4 mJ / cm 2 .
- Example 4 (Resist system with triphenylsulfonium nonaflate and base) A fourth embodiment of the resist system according to the invention is produced analogously to Example 3, but additionally 3 mg
- Triphenylsulfonium acetate was added as the base to the solution.
- the exposure dose is 4.1 mJ / cm 2 .
- the contrast behavior of this embodiment is the middle curve in FIG. 1 ("PAG + Base").
- the sensitivity is also maintained by adding small amounts of base, even if the sensitivity is lower than in the left curve in FIG. 1, ie when using a polymer according to the invention with PAG without base.
- a resist system is produced analogously to Example 2, with iodonium hexaflate as the photo acid generator instead of the di (tert-butylphenyl) iodonium
- Diphenyliodonium triflate [Ph 2 J + , CF 3 S0 3 ⁇ ] is used.
- the exposure dose is 1.3 mJ / cm 2 .
- Example 6 Resist system with triphenylsulfonium triflate
- a resist system is produced analogously to Example 2, triphenylsulfonium triflate [Ph 3 S + , CF 3 S0 3 ⁇ ] being used as the photo acid generator instead of the di (tert-butylphenyl) iodonium hexaflate.
- the exposure dose is 0.8 mJ / cm 2 .
- the left curve in FIG. 1 shows a contrast curve, which was determined with a resist system according to this exemplary embodiment. This makes it clear that the photo acid generator significantly improves the sensitivity, so that good results are achieved even with small exposure doses.
- a resist system is produced analogously to Example 2, triphenylsulfonium hexaflate [Ph 3 S + , CF 3 CHF CF 2 S0 3 ⁇ ] being used instead of the di (tert-butylphenyl) iodonium hexaflate as the photoacid generator.
- the exposure dose is 1.6 mJ / cm 2 .
- Examples 2 to 7 listed show some combinations of the photo acid generators.
- possible permutations of the triphenylsulfonium, diphenyliodonium and di (tert-butylphenyl) iodonium salts of trifluorosulfonic acid (triflates), hexafluorosulfonic acid (hexaflate) or nonafluorosulfonic acid (nonaflate) are suitable.
- the embodiment of the invention is not limited to the preferred exemplary embodiments specified above. Rather, a number of variants are conceivable which make use of the resist system according to the invention and the lithography method according to the invention even in the case of fundamentally different types.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03773450A EP1546806A2 (de) | 2002-09-30 | 2003-09-19 | Resistsystem, verwendung eines resistsystems und lithographieverfahren zur herstellung von halbleiterbauelementen |
AU2003281916A AU2003281916A1 (en) | 2002-09-30 | 2003-09-19 | Resist system, use of a resist system and lithography method for the production of semiconductor elements |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10246546.0 | 2002-09-30 | ||
DE2002146546 DE10246546B4 (de) | 2002-09-30 | 2002-09-30 | Verwendung eines Resistsystems und Lithographieverfahren zur Herstellung von Halbleiterbauelementen |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004031858A2 true WO2004031858A2 (de) | 2004-04-15 |
WO2004031858A3 WO2004031858A3 (de) | 2004-07-01 |
Family
ID=32010280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/003178 WO2004031858A2 (de) | 2002-09-30 | 2003-09-19 | Resistsystem, verwendung eines resistsystems und lithographieverfahren zur herstellung von halbleiterbauelementen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1546806A2 (de) |
AU (1) | AU2003281916A1 (de) |
DE (1) | DE10246546B4 (de) |
WO (1) | WO2004031858A2 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1035441A1 (de) * | 1999-03-09 | 2000-09-13 | Matsushita Electric Industrial Co., Ltd. | Verfahren zur Herstellung von Mustern |
US20020028406A1 (en) * | 2000-06-21 | 2002-03-07 | Lee Geun Su | Partially crosslinked polymer for bilayer photoresist |
US6444395B1 (en) * | 1999-03-12 | 2002-09-03 | Matsushita Electric Industrial Co., Ltd. | Pattern formation material and method |
US6447980B1 (en) * | 2000-07-19 | 2002-09-10 | Clariant Finance (Bvi) Limited | Photoresist composition for deep UV and process thereof |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0919867B1 (de) * | 1997-11-28 | 2003-05-21 | Infineon Technologies AG | Chemisch verstärkter Resist für die Elektronenstrahllithographie |
EP0955562A1 (de) * | 1998-05-07 | 1999-11-10 | Siemens Aktiengesellschaft | Chemisch verstärkter Resist |
JP4139548B2 (ja) * | 2000-04-06 | 2008-08-27 | 富士フイルム株式会社 | ポジ型フォトレジスト組成物 |
JP3853168B2 (ja) * | 2001-03-28 | 2006-12-06 | 松下電器産業株式会社 | パターン形成方法 |
DE10137109A1 (de) * | 2001-07-30 | 2003-02-27 | Infineon Technologies Ag | Siliziumhaltiger Resist für die Fotolithografie |
DE10243742B4 (de) * | 2002-09-20 | 2007-11-08 | Qimonda Ag | Verfahren zur Strukturierung von Halbleitersubstraten unter Verwendung eines Fotoresists |
-
2002
- 2002-09-30 DE DE2002146546 patent/DE10246546B4/de not_active Expired - Fee Related
-
2003
- 2003-09-19 AU AU2003281916A patent/AU2003281916A1/en not_active Abandoned
- 2003-09-19 WO PCT/DE2003/003178 patent/WO2004031858A2/de not_active Application Discontinuation
- 2003-09-19 EP EP03773450A patent/EP1546806A2/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1035441A1 (de) * | 1999-03-09 | 2000-09-13 | Matsushita Electric Industrial Co., Ltd. | Verfahren zur Herstellung von Mustern |
US6444395B1 (en) * | 1999-03-12 | 2002-09-03 | Matsushita Electric Industrial Co., Ltd. | Pattern formation material and method |
US20020028406A1 (en) * | 2000-06-21 | 2002-03-07 | Lee Geun Su | Partially crosslinked polymer for bilayer photoresist |
US6447980B1 (en) * | 2000-07-19 | 2002-09-10 | Clariant Finance (Bvi) Limited | Photoresist composition for deep UV and process thereof |
Non-Patent Citations (1)
Title |
---|
LEUSCHNER R ET AL: "Bilayer resist process for exposure with low-voltage electrons (STM-lithography)" MICROELECTRONIC ENGINEERING, ELSEVIER PUBLISHERS BV., AMSTERDAM, NL, Bd. 30, Nr. 1, 1996, Seiten 447-450, XP004003121 ISSN: 0167-9317 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003281916A8 (en) | 2004-04-23 |
DE10246546A1 (de) | 2004-04-15 |
AU2003281916A1 (en) | 2004-04-23 |
EP1546806A2 (de) | 2005-06-29 |
DE10246546B4 (de) | 2006-10-05 |
WO2004031858A3 (de) | 2004-07-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0342498B1 (de) | Positiv und negativ arbeitende strahlungsempfindliche Gemische sowie Verfahren zur Herstellung von Reliefmustern | |
DE60204980T2 (de) | Additiv enthaltende photoresistzusammensetzung für die duv-lithographie | |
EP0394741B1 (de) | Verfahren zur Erzeugung ätzresistenter Strukturen | |
DE69930832T2 (de) | Benutzung einer zusammensetzung für eine antireflexunterschicht | |
EP0342496B1 (de) | Strahlungsempfindliches Gemisch und Verfahren zur Herstellung von Reliefmustern | |
EP0342495B1 (de) | Strahlungsempfindliches Gemisch und Verfahren zur Herstellung von Reliefmustern | |
DE10203838A1 (de) | Fluorhaltiger Fotoresist mit Reaktionsankern für eine chemische Nachverstärkung und verbesserten Copolymerisationseigenschaften | |
WO2001042860A1 (de) | Erzeugung von resiststrukturen | |
DE3721741A1 (de) | Strahlungsempfindliches gemisch fuer lichtempfindliche beschichtungsmaterialien | |
DE19956531A1 (de) | Vernetzer für ein Photoresist und diesen enthaltende Photoresistzusammensetzung | |
DE19919795A1 (de) | Polymer und dessen Verwendung in einem Verfahren zur Bildung eines Mikromusters | |
EP0957399B1 (de) | Strahlungsempfindliches Gemisch und dessen Verwendung | |
EP0919867A2 (de) | Chemisch verstärkter Resist für die Elektronenstrahllithographie | |
DE10134162A1 (de) | Neuartiges Copolymeres, Photoresistzusammensetzung und Verfahren zur Herstellung eines Photoresistmusters mit hohem Seitenverhältnis | |
DE19907700A1 (de) | Polymermaterial für ein Photoresist, dieses enthaltende Photoresistzusammensetzung und Herstellungsverfahren hierfür | |
DE3219438A1 (de) | Lichtempfindlicher koerper | |
DE69935938T2 (de) | Ein strahlungsempfindliches Material und Verfahren zur Herstellung von einem Muster damit | |
DE10120673A1 (de) | Verfahren zur Strukturierung einer Photolackschicht | |
EP0955562A1 (de) | Chemisch verstärkter Resist | |
DE10134163A1 (de) | Neuartiges Copolymeres, Photoresistzusammensetzung und Verfahren zur Herstellung eines Photoresistmusters mit hohem Seitenverhältnis | |
EP0760971B1 (de) | Trockenentwickelbarer positivresist | |
DE10137100B4 (de) | Transparenzverbesserung von Resist-Copolymeren für die 157 nm-Fotolithografie durch Einsatz von fluorierten Zimtsäurederivaten | |
DE10246546B4 (de) | Verwendung eines Resistsystems und Lithographieverfahren zur Herstellung von Halbleiterbauelementen | |
DE19843089A1 (de) | Auflösungsinhibitor eines chemisch verstärkten Photoresists und diesen enthaltende Photoresistzusammensetzung | |
DE19905568B4 (de) | Polymergemisch für ein Photoresist und dieses Gemisch enthaltende Photoresistzusammensetzung |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003773450 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003773450 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2003773450 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |