DE10124736B4 - Reticle for proximity characterization of scanner lenses and corresponding method - Google Patents
Reticle for proximity characterization of scanner lenses and corresponding method Download PDFInfo
- Publication number
- DE10124736B4 DE10124736B4 DE10124736A DE10124736A DE10124736B4 DE 10124736 B4 DE10124736 B4 DE 10124736B4 DE 10124736 A DE10124736 A DE 10124736A DE 10124736 A DE10124736 A DE 10124736A DE 10124736 B4 DE10124736 B4 DE 10124736B4
- Authority
- DE
- Germany
- Prior art keywords
- reticle
- modules
- line
- center line
- proximity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70591—Testing optical components
-
- 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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/38—Masks having auxiliary features, e.g. special coatings or marks for alignment or testing; Preparation thereof
- G03F1/44—Testing or measuring features, e.g. grid patterns, focus monitors, sawtooth scales or notched scales
-
- 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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70425—Imaging strategies, e.g. for increasing throughput or resolution, printing product fields larger than the image field or compensating lithography- or non-lithography errors, e.g. proximity correction, mix-and-match, stitching or double patterning
- G03F7/70433—Layout for increasing efficiency or for compensating imaging errors, e.g. layout of exposure fields for reducing focus errors; Use of mask features for increasing efficiency or for compensating imaging errors
- G03F7/70441—Optical proximity correction [OPC]
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Preparing Plates And Mask In Photomechanical Process (AREA)
Abstract
Test-Retikel zur Proximity-Charakterisierung von Scannerlinsen in der Lithographietechnologie mit Modulen (1), die Zellen (3) aufweisen, in denen Linien bestimmter Linienweiten (w) und Linienabstände (a) in verschiedenen Orientierungen angeordnet sind, dadurch gekennzeichnet, dass beidseitig einer Retikel-Mittellinie (M) Mittellinien-Module alternierend in x- und y-Orientierung angeordnet sind, wobei die Mittellinien-Module bzgl. eines Zentrumspunktes (Z) der Retikel-Mittellinie (M) punktsymmetrisch angeordnet sind.Test reticle for the proximity characterization of scanner lenses in lithography technology Modules (1) comprising cells (3) in which lines of certain Linewidths (w) and line distances (a) are arranged in different orientations, characterized that on both sides of a reticle midline (M) centerline modules alternate are arranged in x and y orientation, with the centerline modules with respect to a center point (Z) of the reticle center line (M) point-symmetrical are arranged.
Description
Die vorliegende Erfindung betrifft ein Retikel zur Proximity-Charakterisierung von Scannerlinsen in der Lithographietechnik sowie ein entsprechendes Verfahren.The The present invention relates to a reticle for proximity characterization of scanner lenses in lithographic technology and a corresponding method.
Mit zunehmender Verringerung der Strukturgrößen in der Halbleitertechnik ist es erforderlich, die Charakteristika von Lithographie-Belichtungsanlagen genau zu spezifizieren und bei Bedarf und Möglichkeit nachteilige Effekte zu korrigieren bzw. zu minimieren. Eine wesentliche Eigenschaft der eingesetzten Belichtungsanlagen bzw. von optischen Abbildungssystemen ist das sogenannte Proximity-Verhalten (Abhängigkeit der Linienweite von ihrer Umgebungsbedingung, d.h. der Abstand zur nächsten Struktur). Diese Charakteristik und deren Korrektur bestimmt entscheidend die Linienbreitenvariation auf einem Chip und hat somit entscheidenden Einfluss auf die Qualität von Halbleiterprodukten (z.B. Transistorgeschwindigkeit, Ausbeute).With increasing reduction of structure sizes in semiconductor technology it is necessary to know the characteristics of lithographic exposure equipment to specify exactly and if necessary and possible adverse effects to correct or minimize. An essential property the exposure systems used or of optical imaging systems is the so-called proximity behavior (dependence of the line width of their environmental condition, i. the distance to the next structure). This characteristic and their correction decisively determines the line width variation on a chip and thus has a decisive influence on the quality of semiconductor products (e.g., transistor speed, yield).
Zur Realisierung der geforderten Strukturbreiten werden zunehmend Step- und Scan-Belichtungsanlagen (Scanner) eingesetzt, die eine höhere Auflösung und ein größeres Belichtungsbildfeld erlauben. Ein derartiger Scanner ist vereinfacht als Scanning-Waferstepper in Widmann, Mader, Friedrich: „Technologie hochintegrierter Schaltungen"; 2. Auflage; Springer Verlag; Seite 126 dargestellt und beschrieben.to Realization of the required structure widths are increasingly being and scan exposure systems (scanners) used a higher resolution and a larger exposure frame allow. Such a scanner is simplified as a scanning wafer stapler in Widmann, Mader, Friedrich: "Technology highly integrated circuits "; 2nd Edition; Springer Verlag; Page 126 presented and described.
Aus
der
Aufgabe der vorliegenden Erfindung ist es, die Charakterisierung der Proximity-Eigenschaften von Scannerlinsen zu verbessern.task The object of the present invention is to characterize the proximity properties of To improve scanner lenses.
Diese Aufgabe wird durch ein Test-Retikel mit den Merkmalen des Anspruchs 1 und ein Verfahren mit den Merkmalen des Anspruches 7 gelöst. In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen der Erfindung wiedergeben.These Task is performed by a test reticle with the features of the claim 1 and a method having the features of claim 7 solved. In the dependent claims are advantageous embodiments of the invention play.
Erfindungsgemäß sind auf dem Test-Retikel zahlreiche Module angeordnet, die Zellen aufweisen, in denen jeweils Linien bestimmter Linienweiten w und Linienabstände a in verschiedenen Orientierungen angeordnet sind. Die Charakterisierung des Scanner-Abbildungssystems ist mit Hilfe des dafür entworfenen Test-Retikels bzw. der Test-Belichtungsmaske über das gesamte Belichtungsbildfeld, über den Scannerslit sowie in den verschiedenen Orientierungen (x-Richtung, y-Richtung) möglich. Weiterhin ist vorgesehen, dass beidseitig einer Retikel-(Masken)-Mittellinie des Test-Retikels Mittellinien-Module alternierend in x- und y-Orientierung angeordnet sind. Dadurch sind innerhalb der räumlichen Ausdehnung des Scannerslits unterschiedlich auftretende Proximity-Effekte gut nachweisbar.According to the invention are on The test reticle has numerous modules arranged in it each line of certain line widths w and line distances a in different orientations are arranged. The characterization of the scanner imaging system is designed with the help of it Test reticle or the test exposure mask over the entire exposure image field, over the Scannerlit as well as in the different orientations (x-direction, y-direction) possible. It is further provided that on both sides of a reticle (mask) center line of the test reticle Centerline modules alternately in x and y orientation are arranged. This results in the spatial extent of the scanner's lite different Proximity effects well detectable.
Darüber hinaus ist vorgesehen, dass ausgewählte Module bzgl. eines Zentrumspunktes des Test-Retikels im wesentlichen punktsymmetrisch angeordnet sind. In diesem Fall ermöglicht das Test-Retikel durch eine Rotation um 180° die Beschreibung der Proximityeffekte an ein und derselben Position in x- und y-Richtung mit zwei Belichtungsvorgängen.Furthermore is provided that selected Modules with respect to a center point of the test reticle substantially are arranged point-symmetrically. In this case, this allows Test reticle by rotating through 180 ° the description of the proximity effects in one and the same position in the x and y directions with two exposures.
In
der einzigen Figur ist das erfindungsgemäße Retikel schematisiert dargestellt.
Auf dem Test-Retikel der Größe 25 auf
33 cm sind zahlreiche einzelne Module
In
vier Retikel-Eckbereichen B sind die Module
Zur Belichtung des Test-Chips wird das Test-Retikel in y-Richtung am parallel zur Retikel-Mittellinie M angeordneten Scannerslit, der beispielsweise 30 auf 7 cm groß ist, vorbeibewegt. Nach der Belichtung des Test-Chips mit dem Retikel werden die Proximityeffekte mittels Rasterelektronenmikroskop oder elektrischer Messungen inline oder offline ausgewertet, beschrieben und beim Design der mit dem getesteten Scanner zu belichtenden Halbleiterschaltungen entsprechend berücksichtigt.to Exposing the test chip, the test reticle is parallel in the y direction to the reticle center line M arranged scanner slit, for example 30 to 7 inches tall, moved past. After exposure of the test chip to the reticle are the proximity effects by means of scanning electron microscope or electrical measurements evaluated inline or offline, described and the design of the semiconductor circuits to be exposed to the scanner being tested considered accordingly.
- 11
- Modulmodule
- 33
- Zellecell
- 55
- Sondermodulspecial module
- aa
- Linienabstandline spacing
- BB
- RetikeleckbereichRetikeleckbereich
- MM
- MaskenmittellinieMask center line
- ss
- Breite des Scannerslitswidth the scanner's lite
- ww
- Linienweiteline width
- ZZ
- Zentrumspunktcenter point
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10124736A DE10124736B4 (en) | 2001-05-21 | 2001-05-21 | Reticle for proximity characterization of scanner lenses and corresponding method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10124736A DE10124736B4 (en) | 2001-05-21 | 2001-05-21 | Reticle for proximity characterization of scanner lenses and corresponding method |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10124736A1 DE10124736A1 (en) | 2002-12-05 |
DE10124736B4 true DE10124736B4 (en) | 2006-11-30 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE10124736A Expired - Fee Related DE10124736B4 (en) | 2001-05-21 | 2001-05-21 | Reticle for proximity characterization of scanner lenses and corresponding method |
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Country | Link |
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DE (1) | DE10124736B4 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1083462A1 (en) * | 1998-03-26 | 2001-03-14 | Nikon Corporation | Exposure method and system, photomask, method of manufacturing photomask, micro-device and method of manufacturing micro-device |
-
2001
- 2001-05-21 DE DE10124736A patent/DE10124736B4/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1083462A1 (en) * | 1998-03-26 | 2001-03-14 | Nikon Corporation | Exposure method and system, photomask, method of manufacturing photomask, micro-device and method of manufacturing micro-device |
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Publication number | Publication date |
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DE10124736A1 (en) | 2002-12-05 |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |