DE10143516B4 - Method of making an EUV reflection mask - Google Patents
Method of making an EUV reflection mask Download PDFInfo
- Publication number
- DE10143516B4 DE10143516B4 DE2001143516 DE10143516A DE10143516B4 DE 10143516 B4 DE10143516 B4 DE 10143516B4 DE 2001143516 DE2001143516 DE 2001143516 DE 10143516 A DE10143516 A DE 10143516A DE 10143516 B4 DE10143516 B4 DE 10143516B4
- Authority
- DE
- Germany
- Prior art keywords
- areas
- radiation
- mask
- multilayer layer
- reflection mask
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 230000007547 defect Effects 0.000 claims abstract description 25
- 230000008439 repair process Effects 0.000 claims abstract description 22
- 239000004065 semiconductor Substances 0.000 claims abstract description 8
- 238000002310 reflectometry Methods 0.000 claims abstract description 7
- 230000005855 radiation Effects 0.000 claims description 12
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 239000006096 absorbing agent Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- CKHJYUSOUQDYEN-UHFFFAOYSA-N gallium(3+) Chemical compound [Ga+3] CKHJYUSOUQDYEN-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- 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
- G03F1/22—Masks or mask blanks for imaging by radiation of 100nm or shorter wavelength, e.g. X-ray masks, extreme ultraviolet [EUV] masks; Preparation thereof
- G03F1/24—Reflection masks; Preparation thereof
-
- 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
- G03F1/68—Preparation processes not covered by groups G03F1/20 - G03F1/50
- G03F1/72—Repair or correction of mask defects
-
- 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
- G03F1/68—Preparation processes not covered by groups G03F1/20 - G03F1/50
- G03F1/72—Repair or correction of mask defects
- G03F1/74—Repair or correction of mask defects by charged particle beam [CPB], e.g. focused ion beam
Abstract
Verfahren zur Herstellung einer Reflexionsmaske, insbesondere EUV-Reflexionsmaske, bei dem in oder auf einer Multilayerschicht (2), die auf der einem zu belichtenden Halbleiterwafer zugewendeten Vorderseite (V) der Reflexionsmaske (1) vorgesehen ist, entsprechend den auf dem Halbleiterwafer zu belichtenden Mustern gut reflektierende Maskenbereiche (4, 4') und strahlungsabsorbierende Bereiche (3) gebildet werden, wobei ein Reparaturschritt vorgesehen ist, der helle Defektbereiche (4') der Multilayerschicht (2), die fälschlich strahlungsreflektierende Maskenbereiche statt strahlungsabsorbierende Bereiche (3) bilden, mit einem Schreibstrahl (5) repariert, dadurch gekennzeichnet, dass die Reparatur durch Einstrahlung von Laserstrahlen durchgeführt wird, die beim Überstreichen der hellen Defektbereiche (4') örtlich die Reflektivität der Multilayerschicht (2) reduzieren und diese dort strahlungsabsorbierend machen.Method for producing a reflection mask, in particular an EUV reflection mask, in which in or on a multilayer layer (2) which is provided on the front side (V) of the reflection mask (1) facing a semiconductor wafer to be exposed, in accordance with the patterns to be exposed on the semiconductor wafer well-reflecting mask areas (4, 4 ') and radiation-absorbing areas (3) are formed, a repair step being provided which includes bright defect areas (4') of the multilayer layer (2) which incorrectly form radiation-reflecting mask areas instead of radiation-absorbing areas (3) repairs a writing beam (5), characterized in that the repair is carried out by irradiation of laser beams, which locally reduce the reflectivity of the multilayer layer (2) when the bright defect regions (4 ') are scanned and make it radiation-absorbing there.
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer Reflexionsmaske, insbesondere EUV-Reflexionsmaske gemäß dem Oberbegriff des Patentanspruchs 1. Ein derartiges Verfahren ist aus SPIE Conference on Emerging Lithographic Technologies III, Santa Clara CA, March 1999, SPIE vol. 3676 bekannt.The invention relates to a method for the production of a reflection mask, in particular EUV reflection mask according to the generic term of claim 1. Such a method is from SPIE Conference on Emerging Lithographic Technologies III, Santa Clara CA, March 1999, SPIE vol. 3676 known.
Bei der EUV-Technologie wird eine auf einem Halbleiterwafer liegende zu belichtende Schicht mit EUV-Strahlung, das heißt Strahlung im extremen Ultraviolettspektralbereich mittels einer EUV-Reflexionsmaske belichtet. Die Belichtungsstrahlung trifft nicht senkrecht, sondern unter einem kleinen Einfallswinkel relativ zum Lot auf die Maske, wird von reflektierenden Bereichen der Reflexionsmaske reflektiert und fällt dann auf die lichtempfindliche Schicht des Wafers.EUV technology is one layer to be exposed with EUV radiation lying on a semiconductor wafer, this means Radiation in the extreme ultraviolet spectral range using a EUV reflection mask exposed. The exposure radiation does not hit vertical, but at a small angle of incidence relative to the Solder on the mask, is made of reflective areas of the reflection mask reflects and falls then on the photosensitive layer of the wafer.
Anhand der in Anlage beiliegenden
Bei der Herstellung einer derartigen Reflexionsmaske kann es durch Verunreinigungen zu Defekten kommen. Man unterscheidet helle Defekte, das heißt nicht gewünschter Materialverlust beim Herstellen der Maske, und dunkle Defekte, das heißt ungewollter Materialrückstand (der Absorberschicht) bei der Herstellung der Maske.In the manufacture of such Reflection mask can cause defects due to contamination. A distinction is made between bright defects, that is, those that are not desired Material loss when making the mask, and dark defects, that means unwanted material residue (the absorber layer) in the manufacture of the mask.
In
Die voranstehend zum Oberbegriff des Patentanspruches 1 zitierte Druckschrift: SPIE Conference on Emerging Lithographic Technologies III, beschreibt insbesondere auf Seite 310 ein Verfahren zur Herstellung einer EUV-Reflexionsmaske, bei dem helle Defektbereiche durch Abscheiden einer Lage von Absorptionsmaterial repariert werden, das nicht unbedingt mit dem des Maskenabsorbermaterials identisch ist. Ferner wird zur Reparatur von opaken Defekten, das sind Stellen, an denen das Absorbermaterial nicht oder nicht ganz entfernt wurde, zunächst durch einen Schritt, der das fehlerhafte Absorbermaterial durch Sputtern entfernt und dann durch einen Schritt, der an der Stelle, wo das fehlerhafte Absorbermaterial durch Sputtern entfernt wurde, einen fokussierten Galliumionenstrahl in eine oberste SiO2-Schicht der Multilayerschicht einstrahlt, repariert. Bei dem letztgenannten Reparaturverfahren zur Reparatur von opaken Stellen kann auch eine Verschmutzung des Substrats durch Gallium auftreten. Da Gallium ein starker EUV-Lichtabsorber ist, werden diese Stellen selbst zu weiteren opaken Absorberdefekten. Dieses bekannte Verfahren schlägt deshalb vor, als oberste Schicht über der Multilayerlage eine dünne SiO2-Oxidlage aufzubringen und bei der Reparatur die Verschmutzung durch Gallium durch nachträgliche Entfernung der kontaminierten Oxidlage zu beseitigen. Allerdings ist dieses bekannte Verfahren nicht unbedingt als eine nachträgliche Reparatur von Defektbereichen geeignet.The publication cited above for the preamble of claim 1: SPIE Conference on Emerging Lithographic Technologies III, describes in particular on page 310 a method for producing an EUV reflection mask in which bright defect areas are repaired by separating a layer of absorption material that is not necessarily with the of the mask absorber material is identical. Furthermore, in order to repair opaque defects, that is, places where the absorber material has not been removed or not completely removed, first by a step that removes the faulty absorber material by sputtering and then by a step that takes place at the location where the faulty absorber material was removed by sputtering, irradiated a focused gallium ion beam into an uppermost SiO 2 layer of the multilayer layer, repaired. In the latter repair process for repairing opaque areas, gallium can also contaminate the substrate. Since gallium is a strong EUV light absorber, these areas themselves become further opaque absorber defects. This known method therefore proposes to apply a thin SiO 2 oxide layer as the top layer over the multilayer layer and to remove the contamination by gallium during the repair by subsequently removing the contaminated oxide layer. However, this known method is not necessarily suitable as a subsequent repair of defect areas.
Es ist Aufgabe der Erfindung, ein Verfahren zur Herstellung einer Reflexionsmaske, insbesondere EUV-Reflexionsmaske mit einem Reparaturschritt zu ermöglichen, mit dem helle Defektbereiche nachträglich repariert werden können.It is an object of the invention Method for producing a reflection mask, in particular an EUV reflection mask with a repair step that allows bright defect areas later can be repaired.
Die dem erfindungsgemäßen Herstellungsverfahren zugrundeliegende Idee ist, die Reparatur heller Defektbereiche am auf der Maske existierenden Multilayer vorzunehmen.The manufacturing method according to the invention underlying idea is to repair bright defect areas on the existing multilayer on the mask.
Gemäß einem wesentlichen Aspekt betrifft die Erfindung ein Verfahren zur Herstellung einer Reflexionsmaske, insbesondere EUV-Reflexionsmaske, bei dem in oder auf einer Multilayerschicht, die auf der einem zu belichtenden Halbleiterwafer zugewendeten Vorderseite der Reflexionsmaske vorgesehen ist, entsprechend den auf dem Halbleiterwafer zu belichtenden Mustern gut reflektierende Maskenbereiche und strahlungsabsorbierende Bereiche gebildet werden, wobei ein Reparaturschritt vorgesehen ist, der helle Defektbereiche der Multilayerschicht, die fälschlich strahlungsreflektierende Maskenbereiche statt strahlungsabsorbierende Bereiche bilden, mit einem Schreibstrahl repariert, dadurch gekennzeichnet, dass die Reparatur durch Einstrahlung von Laserstrahlen durchgeführt wird, die beim Überstreichen der hellen Defektbereiche örtlich die Reflektivität der Multilayerschicht reduzieren und diese dort strahlungsabsorbierend machen.According to an essential aspect The invention relates to a method for producing a reflection mask, in particular EUV reflection mask, in which in or on a multilayer layer, the front side facing a semiconductor wafer to be exposed the reflection mask is provided, corresponding to that on the semiconductor wafer well-reflective mask areas and radiation-absorbing patterns to be exposed Areas are formed, a repair step being provided, the bright defect areas of the multilayer layer, which are falsely radiation-reflecting mask areas instead of radiation-absorbing Form areas, repaired with a writing beam, characterized, that the repair is carried out by irradiation of laser beams, that when painting over of the bright defect areas locally the reflectivity reduce the multilayer layer and absorb it there do.
Mit dem Laserstrahl wird somit die zu reparierende Stelle, das heißt der fälschlich entstandene helle Defektbereich der Multilayerschicht dunkel geschrieben. Der Laserstrahl verändert die Transmissionen bzw. Reflektivität des Multilayers und macht ihn an der beschriebenen Stelle strahlungsabsorbierend.With the laser beam location to be repaired, that is the wrong The resulting bright defect area of the multilayer layer is written in dark. The laser beam changed the transmissions or reflectivity of the multilayer and makes it absorbs radiation at the point described.
Die Ausrichtung des Schreibstrahls kann an den schon existierenden umgebenden Strukturen stattfinden.The alignment of the write beam can take place on the already existing surrounding structures.
Ein großer Vorteil des erfindungsgemäßen Verfahrens besteht darin, dass mit dem Schreiber eine sehr hohe Auflösung erzielbar ist, die zu einer exakten Abbildung der gewünschten Struktur führt.A great advantage of the method according to the invention is that with the writer a very high resolution can be achieved, which leads to an exact mapping of the desired structure.
In der nachstehenden Beschreibung wird ein Ausführungsbeispiel des erfindungsgemäßen Herstellungsverfahrens bezogen auf die Zeichnung näher erläutert.In the description below becomes an embodiment of the manufacturing method according to the invention based on the drawing explained.
Die Figuren der Zeichnung zeigen im einzelnen:The figures in the drawing show in detail:
An dieser Stelle sei bemerkt, dass das nachfolgend beschriebene Ausführungsbeispiel die Herstellung einer EUV-Reflexionsmaske beschreibt, dass jedoch auch andersartige Reflexionsmasken mit Hilfe des erfindungsgemäßen Verfahrens herstellbar bzw. reparierbar sind.At this point it should be noted that the embodiment described below the manufacture an EUV reflection mask describes that however also different Reflection masks can be produced using the method according to the invention or are repairable.
Gemäß
In
Der zur Durchführung des erfindungsgemäßen Reparaturschritts
verwendete Schreiberstrahl
Mit dem erfindungsgemäß zur Reparatur ungewünschter heller Defektbereiche verwendeten Schreiberstrahl erzielt man eine sehr hohe Auflösung, die zu einer exakten Abbildung der gewünschten Struktur führt.With the invention for repair unwanted If the defect beam is used in bright defect areas, a very high resolution, which leads to an exact mapping of the desired structure.
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001143516 DE10143516B4 (en) | 2001-09-05 | 2001-09-05 | Method of making an EUV reflection mask |
PCT/DE2002/003121 WO2003025673A2 (en) | 2001-09-05 | 2002-08-26 | Method for the production of an euv reflection mask |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001143516 DE10143516B4 (en) | 2001-09-05 | 2001-09-05 | Method of making an EUV reflection mask |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10143516A1 DE10143516A1 (en) | 2003-04-17 |
DE10143516B4 true DE10143516B4 (en) | 2004-09-16 |
Family
ID=7697807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2001143516 Expired - Fee Related DE10143516B4 (en) | 2001-09-05 | 2001-09-05 | Method of making an EUV reflection mask |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10143516B4 (en) |
WO (1) | WO2003025673A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012042480A1 (en) | 2010-09-28 | 2012-04-05 | Kahr Medical Ltd. | Compositions and methods for treatment of hematological malignancies |
-
2001
- 2001-09-05 DE DE2001143516 patent/DE10143516B4/en not_active Expired - Fee Related
-
2002
- 2002-08-26 WO PCT/DE2002/003121 patent/WO2003025673A2/en not_active Application Discontinuation
Non-Patent Citations (2)
Title |
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SPIE, Conference on Emerging Lithographic Techno- logies III, Santa Clara, Ca. March 1999, SPIE Vol. 3676 |
SPIE, Conference on Emerging Lithographic Techno- logies III, Santa Clara, Ca. March 1999, SPIE Vol.3676 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003025673A2 (en) | 2003-03-27 |
DE10143516A1 (en) | 2003-04-17 |
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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 |