JPH031821B2 - - Google Patents

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Publication number
JPH031821B2
JPH031821B2 JP28680785A JP28680785A JPH031821B2 JP H031821 B2 JPH031821 B2 JP H031821B2 JP 28680785 A JP28680785 A JP 28680785A JP 28680785 A JP28680785 A JP 28680785A JP H031821 B2 JPH031821 B2 JP H031821B2
Authority
JP
Japan
Prior art keywords
ray
mask
absorption band
pattern
ray absorption
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 - Lifetime
Application number
JP28680785A
Other languages
Japanese (ja)
Other versions
JPS62144328A (en
Inventor
Hiroki Shimano
Nobuyuki Yoshioka
Kiichi Nishikawa
Nobuo Fujiwara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP60286807A priority Critical patent/JPS62144328A/en
Publication of JPS62144328A publication Critical patent/JPS62144328A/en
Publication of JPH031821B2 publication Critical patent/JPH031821B2/ja
Granted legal-status Critical Current

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  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、軟X線源を光源としたX線露光に
おいて使用するX線マスクとその製造方法に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an X-ray mask used in X-ray exposure using a soft X-ray source as a light source, and a method for manufacturing the same.

〔従来の技術〕[Conventional technology]

第3図は、従来のX線マスクであり、図におい
て、1aはシリコン等よりなるX線マスクの支持
台、2はX線透過膜、3はAu等よりなるX線吸
収帯パターンである。
FIG. 3 shows a conventional X-ray mask. In the figure, 1a is an X-ray mask support made of silicon or the like, 2 is an X-ray transparent film, and 3 is an X-ray absorption band pattern made of Au or the like.

従来、X線マスクを製造するにおいて、そのX
線吸収帯パターン3は、Si3N4、BN等のX線透
過膜2上に形成したレジストパターンを使うAu
メツキ法、あるいはX線透過膜2上に蒸着した
Auの膜の反応性イオンエツチング(RIE)、スパ
ツタエツチ等によつて形成していた。
Conventionally, in manufacturing X-ray masks, the
The line absorption band pattern 3 is an Au pattern using a resist pattern formed on the X-ray transparent film 2 such as Si 3 N 4 or BN.
Deposited using the Metsuki method or on the X-ray transparent film 2
It was formed by reactive ion etching (RIE) of Au film, sputter etching, etc.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

X線マスクのコントラストを高めるためには、
Au等のX線吸収帯の膜厚を0.5μm〜1.0μm以上
の厚さにする必要があり、そのためにはAuメツ
キ法がすぐれているが、これでは微細パターン形
成が難しい。又RIE、スパツタエツチ等の方法に
よるX線吸収パターンの形成は微細パターン形成
には良いが、膜厚をあまり厚くできず十分なマス
クコントラストを得られないという問題点があつ
た。
To increase the contrast of the X-ray mask,
It is necessary to make the film thickness of the X-ray absorption band of Au or the like to be 0.5 μm to 1.0 μm or more, and the Au plating method is excellent for this purpose, but it is difficult to form fine patterns with this method. Formation of X-ray absorption patterns by methods such as RIE and sputter etching is good for forming fine patterns, but there is a problem in that the film thickness cannot be made too thick and sufficient mask contrast cannot be obtained.

この発明は、上記のような問題点を解消するた
めになされたもので、膜厚が厚くなくても十分に
高いマスクコントラストを有し、かつ微細パター
ンを形成することのできるX線マスク及びその製
造方法を提供することを目的とする。
This invention was made to solve the above-mentioned problems, and provides an X-ray mask and its X-ray mask that have sufficiently high mask contrast even if the film thickness is not thick and can form fine patterns. The purpose is to provide a manufacturing method.

〔問題点を解決するための手段〕[Means for solving problems]

本発明に係るX線マスクは、X線吸収帯パター
ンを、X線吸収係数の大きい物質からなる薄膜と
X線透過性物質からなる薄膜とが交互に重畳した
多層膜構造としたものである。
In the X-ray mask according to the present invention, the X-ray absorption band pattern has a multilayer structure in which thin films made of a substance with a large X-ray absorption coefficient and thin films made of an X-ray transparent substance are alternately superimposed.

また、本発明の別の発明に係るX線マスクの製
造方法は、X線透過膜上にレジストパターンを形
成し、その上にX線透過性物質とX線吸収係数の
大きい物質とを交互に複数回蒸着して多層膜のX
線吸収帯を形成し、その後上記レジストパターン
及びその上のX線吸収帯を除去するものである。
In addition, in a method for manufacturing an X-ray mask according to another aspect of the present invention, a resist pattern is formed on an X-ray transparent film, and an X-ray transparent substance and a substance with a large X-ray absorption coefficient are alternately applied on the resist pattern. X of multilayer film by multiple evaporation
A radiation absorption band is formed, and then the resist pattern and the X-ray absorption band thereon are removed.

〔作用〕[Effect]

本発明のX線マスクにおいては、X線吸収帯パ
ターンはX線吸収物質と透過性物質との多層膜構
造であるので、該吸収物質と透過性物質との境界
面が入射X線を反射するX線ミラーとして機能し
て上記境界面を節とする、下層ほど振幅の小さい
定在波が上記各吸収物質層内で形成され、上記吸
収帯パターンを透過する入射X線束は著しく少な
くなつてX線マスクのマスクコントラストが高ま
る。
In the X-ray mask of the present invention, since the X-ray absorption band pattern has a multilayer structure of an X-ray absorbing material and a transparent material, the interface between the absorbing material and the transparent material reflects incident X-rays. A standing wave that functions as an X-ray mirror and whose amplitude is smaller in the lower layer is formed with the boundary surface as a node, and the incident X-ray flux that passes through the absorption band pattern is significantly reduced. Increases mask contrast for line masks.

また、本発明の別の発明のX線マスクの製造方
法においては、X線透過膜上にレジストパターン
を形成した後、その上にX線透過性物質と吸収物
質とを交互に複数回蒸着し、その後上記レジスト
パターンを除去するので、多層膜構造のX線吸収
帯パターンの形成されたX線マスクが得られる。
In the method for manufacturing an X-ray mask according to another aspect of the present invention, after forming a resist pattern on an X-ray transparent film, an X-ray transparent material and an X-ray absorbing material are alternately deposited multiple times on the resist pattern. Then, since the resist pattern is removed, an X-ray mask having an X-ray absorption band pattern of a multilayer film structure is obtained.

〔実施例〕〔Example〕

以下、この発明の実施例について説明する。 Examples of the present invention will be described below.

第1図は本発明の別の発明の一実施例による多
層膜構造のX線吸収帯パターンを有するX線マス
クの製造方法を工程順に示し、第1図dに示す最
終生成物が本発明の一実施例によるX線マスクで
ある。図において、1,1a,2は従来例と同一
符号は同一ものである。4はレジストパターン、
5は多層膜構造のX線吸収帯、5aはそのパター
ンである。
FIG. 1 shows a method for manufacturing an X-ray mask having a multilayer film structure and an X-ray absorption band pattern according to another embodiment of the present invention in the order of steps, and the final product shown in FIG. 1 is an X-ray mask according to one embodiment. In the figure, numerals 1, 1a, and 2 are the same as in the conventional example. 4 is a resist pattern,
5 is the X-ray absorption band of the multilayer film structure, and 5a is its pattern.

第2図はX線吸収帯パターン5aの多層膜構造
を示す。図において、6はX線吸収係数の大きい
物質からなる薄膜で、これはAupd合金膜、W膜、
ReW膜等である。7はC(炭素)等のX線透過性
物質からなる薄膜、8は入射するX線、9は上記
薄膜6,7の境界面を節とする定在波である。
FIG. 2 shows the multilayer structure of the X-ray absorption band pattern 5a. In the figure, 6 is a thin film made of a material with a large X-ray absorption coefficient, which is an Aupd alloy film, a W film,
ReW film etc. 7 is a thin film made of an X-ray transparent substance such as C (carbon), 8 is an incident X-ray, and 9 is a standing wave whose node is the interface between the thin films 6 and 7.

次に本実施例によるX線マスクの製造方法につ
いて説明する。まず第1図aに示すように、X線
透過膜2上にレジストパターン4を形成する。次
に第1図bに示すように上記レジストパターン4
を形成したものの上にMBE、イオンクラスタビ
ーム等によつて(AuPd、C)、(W、C)、
(ReW、C)等の薄膜6,7を適当な間隔で交互
に蒸着していき多層膜構造のX線吸収帯5を形成
する。次に第1図cに示すように、上記レジスト
パターン4及びその上のX線吸収帯5を除去し、
第1図dに示すように基板1を支持台1aを残す
ようにエツチングする。このようにして、多層膜
構造を持つたX線吸収帯パターン5aを有するX
線マスクが形成される。
Next, a method for manufacturing an X-ray mask according to this embodiment will be explained. First, as shown in FIG. 1a, a resist pattern 4 is formed on the X-ray transparent film 2. Next, as shown in FIG. 1b, the resist pattern 4 is
(AuPd, C), (W, C), by MBE, ion cluster beam, etc.
Thin films 6 and 7 such as (ReW, C) are deposited alternately at appropriate intervals to form an X-ray absorption band 5 having a multilayer film structure. Next, as shown in FIG. 1c, the resist pattern 4 and the X-ray absorption band 5 thereon are removed,
As shown in FIG. 1d, the substrate 1 is etched so as to leave the support 1a. In this way, the X-ray absorption band pattern 5a having the multilayer film structure is
A line mask is formed.

このような多層膜構造のX線吸収帯パターン5
aでは、第2図で示すように、これにX線8が入
射すると、X線吸収物質からなる薄膜6と透過性
物質からなる薄膜7との境界面で上記入射X線8
の何割かが反射され、上記薄膜6内で上記境界面
を節とする定在波9が形成され、しかも該定在波
9は下層ほど振幅の小さいものである。したがつ
てX線吸収帯パターン5aを透過するX線束は、
入射X線束−(反射X線束+吸収X線束)となり、
このX線吸収帯パターン5aを透過するX線は極
めて少なくなるので、マスクコントラストの高い
X線マスクが得られる。また、これによりX線吸
収帯パターンの膜厚を厚くしなくても、急峻なエ
ツジプロフアイルを持つた微細なレジストパター
ンが得られる。
X-ray absorption band pattern 5 of such a multilayer film structure
As shown in FIG. 2, when X-rays 8 are incident on a, the incident X-rays 8 are absorbed at the interface between the thin film 6 made of an X-ray absorbing material and the thin film 7 made of a transparent material.
Some percentage of this is reflected, and a standing wave 9 is formed within the thin film 6 with the boundary surface as a node, and the amplitude of the standing wave 9 is smaller as the layer is lower. Therefore, the X-ray flux transmitted through the X-ray absorption band pattern 5a is
Incident X-ray flux - (Reflected X-ray flux + Absorbed X-ray flux),
Since the amount of X-rays transmitted through this X-ray absorption band pattern 5a is extremely small, an X-ray mask with high mask contrast can be obtained. Further, as a result, a fine resist pattern having a steep edge profile can be obtained without increasing the film thickness of the X-ray absorption band pattern.

〔発明の効果〕〔Effect of the invention〕

以上のようにこの発明によれば、X線吸収帯パ
ターンを、X線透過性物質とX線吸収係数の大き
い物質とが交互に重畳した多層膜構造としたの
で、より高いマスクコントラストを持つたX線マ
スクが得られ、より急峻なエツジプロフアイルを
持つた微細なレジストパターンを形成できる効果
がある。
As described above, according to the present invention, the X-ray absorption band pattern has a multilayer structure in which X-ray transparent materials and materials with large X-ray absorption coefficients are alternately superimposed, so that higher mask contrast can be achieved. An X-ray mask can be obtained and a fine resist pattern with a steeper edge profile can be formed.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の別の発明の一実施例によるX
線マスクの製造方法を示す工程別断面図、第2図
は本発明の一実施例によるX線マスクのX線吸収
帯パターンを示す断面図、第3図は従来のX線マ
スクを示す断面図である。 図において、1は基板、1aはX線マスク支持
台、2はX線透過膜、3はAuからなるX線吸収
帯パターン、4はレジストパターン、5は多層膜
構造のX線吸収帯、5aはそのパターン、6はX
線吸収係数の大きい物質からなる薄膜、7はX線
透過性物質からなる薄膜、8は入射X線、9は定
在波である。なお図中同一符号は同一又は相当部
分を示す。
FIG. 1 shows an X according to another embodiment of the present invention.
2 is a sectional view showing the X-ray absorption band pattern of an X-ray mask according to an embodiment of the present invention, and FIG. 3 is a sectional view showing a conventional X-ray mask. It is. In the figure, 1 is a substrate, 1a is an X-ray mask support, 2 is an X-ray transparent film, 3 is an X-ray absorption band pattern made of Au, 4 is a resist pattern, 5 is an X-ray absorption band of a multilayer film structure, 5a is the pattern, 6 is X
A thin film made of a substance with a large linear absorption coefficient, 7 a thin film made of an X-ray transparent substance, 8 an incident X-ray, and 9 a standing wave. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】 1 マスク基板上にX線吸収帯パターンを形成し
てなるX線マスクにおいて、 上記X線吸収帯パターンが、X線透過性物質と
X線吸収係数の大きい物質とを交互に重畳した多
層膜構造からなることを特徴とするX線マスク。 2 上記X線透過性物質は炭素(C)であり、上記X
線吸収係数の大きい物質はレニウムタングステン
(ReW)、タングステン(W)又は金パラジウム
(AuPd)であることを特徴とする特許請求の範
囲第1項記載のX線マスク。 3 マスク基板上にX線吸収帯パターンを形成し
てなるX線マスクの製造方法において、 X線吸収帯パターンを形成する工程が、 X線透過膜上にレジストパターンを形成する工
程と、 上記レジストパターンを形成したものの上に、
X線透過性物質とX線吸収係数の大きい物質とを
交互に複数回蒸着して多層膜を形成する工程と、 上記レジストパターンを除去する工程とからな
ることを特徴とするX線マスクの製造方法。 4 上記X線透過性物質は炭素(C)であり、上記X
線吸収係数の大きい物質はレニウムタングステン
(ReW)、タングステン(W)又は金パラジウム
(AuPd)であることを特徴とする特許請求の範
囲第3項記載のX線マスクの製造方法。
[Scope of Claims] 1. In an X-ray mask formed by forming an X-ray absorption band pattern on a mask substrate, the X-ray absorption band pattern alternately includes an X-ray transparent material and a material with a large X-ray absorption coefficient. An X-ray mask characterized by consisting of a multilayer film structure superimposed on the . 2 The above-mentioned X-ray transparent substance is carbon (C), and the above-mentioned
2. The X-ray mask according to claim 1, wherein the material having a large linear absorption coefficient is rhenium tungsten (ReW), tungsten (W), or gold palladium (AuPd). 3. In a method for manufacturing an X-ray mask in which an X-ray absorption band pattern is formed on a mask substrate, the step of forming the X-ray absorption band pattern includes the step of forming a resist pattern on an X-ray transparent film; On top of what formed the pattern,
Production of an X-ray mask comprising the steps of: forming a multilayer film by alternately depositing an X-ray transparent substance and a substance with a large X-ray absorption coefficient multiple times; and removing the resist pattern. Method. 4 The above-mentioned X-ray transparent substance is carbon (C), and the above-mentioned
4. The method of manufacturing an X-ray mask according to claim 3, wherein the material having a large linear absorption coefficient is rhenium tungsten (ReW), tungsten (W), or gold palladium (AuPd).
JP60286807A 1985-12-18 1985-12-18 X-ray mask and its manufacturing method Granted JPS62144328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60286807A JPS62144328A (en) 1985-12-18 1985-12-18 X-ray mask and its manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60286807A JPS62144328A (en) 1985-12-18 1985-12-18 X-ray mask and its manufacturing method

Publications (2)

Publication Number Publication Date
JPS62144328A JPS62144328A (en) 1987-06-27
JPH031821B2 true JPH031821B2 (en) 1991-01-11

Family

ID=17709302

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60286807A Granted JPS62144328A (en) 1985-12-18 1985-12-18 X-ray mask and its manufacturing method

Country Status (1)

Country Link
JP (1) JPS62144328A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0294421A (en) * 1988-09-30 1990-04-05 Toshiba Corp X-ray exposure mask
DE10150874A1 (en) * 2001-10-04 2003-04-30 Zeiss Carl Optical element and method for its production as well as a lithography device and a method for the production of a semiconductor component
JP4857001B2 (en) * 2006-03-24 2012-01-18 積水化成品工業株式会社 Snow melting equipment

Also Published As

Publication number Publication date
JPS62144328A (en) 1987-06-27

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