JP3307031B2 - Replica diffraction grating - Google Patents
Replica diffraction gratingInfo
- Publication number
- JP3307031B2 JP3307031B2 JP28940993A JP28940993A JP3307031B2 JP 3307031 B2 JP3307031 B2 JP 3307031B2 JP 28940993 A JP28940993 A JP 28940993A JP 28940993 A JP28940993 A JP 28940993A JP 3307031 B2 JP3307031 B2 JP 3307031B2
- Authority
- JP
- Japan
- Prior art keywords
- diffraction grating
- replica
- thin film
- film
- substrate
- 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
Landscapes
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、超高真空中での分光に
利用されるレプリカ回折格子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replica diffraction grating used for spectroscopy in an ultra-high vacuum.
【０００２】[0002]
【従来の技術】マスター回折格子から多くのレプリカを
作製して、回折格子（レプリカ回折格子）の量産を行う
手法は従来より行われており、その代表的な手法として
は次のものがある。2. Description of the Related Art Conventionally, a method of mass-producing a diffraction grating (replica diffraction grating) by producing many replicas from a master diffraction grating has been performed.
【０００３】すなわち、まず、ガラス基板にアルミニウ
ムなどの金属薄膜を蒸着し、該膜に格子溝を形成するこ
とによりマスター回折格子を製作する。このマスターを
母型として、その格子面に離形剤として薄く油膜を形成
し、その上に真空蒸着によりアルミニウム薄膜を形成し
た後、このアルミニウム薄膜上にガラス基板を接着剤
（耐熱性樹脂）を介して接着し、接着剤の硬化後、ガラ
ス基板を母型より剥離することによりアルミニウム薄膜
はガラス基板側に移り、レプリカ回折格子が得られる。[0003] First, a master diffraction grating is manufactured by depositing a thin metal film such as aluminum on a glass substrate and forming grating grooves in the thin film. Using this master as a master, a thin oil film is formed as a release agent on the lattice surface, an aluminum thin film is formed thereon by vacuum evaporation, and an adhesive (heat resistant resin) is attached to the glass substrate on the aluminum thin film. After hardening the adhesive, the glass substrate is peeled off from the matrix, whereby the aluminum thin film is moved to the glass substrate side, and a replica diffraction grating is obtained.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
方法で製作したレプリカ回折格子は、転写複製後（レプ
リカ後）、グレーティング面（アルミニウム薄膜）のピ
ンホールや側面部の表面に接着剤が露出した状態となっ
ていた。However, in the replica diffraction grating manufactured by the conventional method, the adhesive was exposed to the pinholes on the grating surface (aluminum thin film) and the surfaces of the side surfaces after the transfer duplication (after the replica). Had been in a state.
【０００５】この状態の回折格子は、室温条件下で用い
る通常の分光器の場合には問題ないが、シンクロトロン
用の分光器のように高真空内で使用する場合、特にベー
キングを行う場合には、露出した接着剤部分からガスが
発生し、真空になるまで長時間を要した。[0005] The diffraction grating in this state has no problem in the case of a normal spectroscope used under room temperature conditions. However, when it is used in a high vacuum such as a spectroscope for a synchrotron, particularly when baking is performed. It took a long time until gas was generated from the exposed adhesive portion and a vacuum was created.
【０００６】これを防止する方法として、レプリカでな
い回折格子、すなわち、マスター回折格子（基板に直接
刻線するか、あるいは基板に膜を蒸着しそこに刻線した
もの）を使用することが考えられるが、このマスター回
折格子は、実際上レプリカ並みに量産することは不可能
で、きわめて高価なものであった。As a method for preventing this, it is conceivable to use a diffraction grating which is not a replica, that is, a master diffraction grating (either directly engraved on the substrate or a film deposited on the substrate and engraved thereon). However, this master diffraction grating was practically impossible to be mass-produced like a replica, and was extremely expensive.
【０００７】そこで、本発明は、レプリカ回折格子にお
いて基板と金属薄膜の間の接着剤の影響をなくした新規
なものを提供することを目的とする。Accordingly, an object of the present invention is to provide a novel replica diffraction grating which eliminates the influence of an adhesive between a substrate and a metal thin film.
【０００８】[0008]
【課題を解決するための手段】本件発明は前記課題を解
決するため、マスター回折格子の格子面に金属薄膜を形
成し、該金属薄膜とレプリカ基板とを接着剤を介して圧
接した後剥離させ、該金属薄膜をレプリカ基板に反転接
着させてなるレプリカ回折格子において、反転接着させ
た金属薄膜及び接着剤層の外周に金属膜をオーバーコー
トするか、あるいはさらに接着剤層の外周に低反射膜を
被覆形成したことを特徴とする。According to the present invention, a metal thin film is formed on a grating surface of a master diffraction grating, and the metal thin film and a replica substrate are separated from each other after being pressed against each other via an adhesive. In a replica diffraction grating obtained by inverting and bonding the metal thin film to a replica substrate, a metal film is overcoated on the outer periphery of the metal film and the adhesive layer which are reversely bonded, or a low reflection film is further formed on the outer periphery of the adhesive layer. Is formed by coating.
【０００９】ここで、マスター回折格子とは、ガラス、
ＳｉＯ2 などの無機材料基板に直接刻線を施すか、又は
基板にアルミニウムなどの金属薄膜を蒸着してそこに刻
線を施こしたものをいい、刻線を施こしたところが格子
面になる。刻線は、回折格子彫刻装置による機械刻線で
も、イオンビームエッチングによる刻線でも良い。Here, the master diffraction grating is glass,
An inscribed line is directly formed on an inorganic material substrate such as SiO 2 or a thin metal film such as aluminum is deposited on the substrate and the engraved line is formed on the substrate. . The marking line may be a mechanical marking line by a diffraction grating engraving device or a marking line by ion beam etching.
【００１０】金属薄膜としては、例えば、アルミニウ
ム、金、白金などの薄膜を挙げることができ、これら薄
膜は、マスター回折格子の格子面に例えば、真空蒸着に
より形成する。なお、金属薄膜を形成するに際して、マ
スター回折格子の格子面に離形剤を塗布しておくことが
好ましい。離形剤としては、例えば、シリコングリース
などを用いることができる。Examples of the metal thin film include thin films of aluminum, gold, platinum and the like. These thin films are formed on the grating surface of the master diffraction grating by, for example, vacuum evaporation. When forming the metal thin film, it is preferable to apply a release agent to the grating surface of the master diffraction grating. As the release agent, for example, silicon grease or the like can be used.
【００１１】レプリカ基板は、温度上昇に伴う溝間隔の
変化を抑えるため低膨脹率の材質を用いるのが好まし
く、これに該当するものとして例えば、石英ガラス、ゼ
ロデュア（ＳＣＨＯＴＴ社製）のような低膨脹結晶ガラ
スを挙げることができる。但し、材質はこれらに限定さ
れず、温度上昇の少ない領域で回折格子を使用する場合
には、ＢＫ７，ＢＳＣ２，パイレックスガラス、ソーダ
ガラスなども用いることができる。For the replica substrate, it is preferable to use a material having a low expansion coefficient in order to suppress a change in groove interval due to a rise in temperature. For example, a material such as quartz glass or Zerodur (manufactured by SCHOTT) may be used. Expanded crystal glass can be mentioned. However, the material is not limited to these, and BK7, BSC2, Pyrex glass, soda glass, and the like can be used when a diffraction grating is used in a region where the temperature rise is small.
【００１２】金属薄膜とレプリカ基板とを接着させる接
着剤としては、尿素樹脂、メラミン樹脂、フェノール樹
脂、エポキシ樹脂などの熱硬化性樹脂を用いることがで
きるが、熱歪の影響を少なくするためには、可視光硬化
樹脂を用いることが好ましい。可視光硬化樹脂として
は、例えばＢＥＮＥＦIXＶＬ（（株）アーデル製）を挙
げることができるが、これらに限定されない。As an adhesive for adhering the metal thin film and the replica substrate, a thermosetting resin such as a urea resin, a melamine resin, a phenol resin, and an epoxy resin can be used. It is preferable to use a visible light curable resin. Examples of the visible light curable resin include, but are not limited to, BENEF IX VL (manufactured by Adel Corporation).
【００１３】金属薄膜及び接着剤層の外周に被覆形成す
る金属膜としては、例えば、アルミニウム、金、銀、な
どの金属膜を挙げることができるが、これらに限定され
ない。また、接着剤層の外周に被覆する低反射膜として
は反射率の小さい金属、例えば、酸化クロムを挙げるこ
とができるが、真空中で、またベーキングしてもガス発
生のない非金属でコート可能なものならば何でも良い。
金属膜、低反射膜の被覆形成は、例えば真空蒸着により
行い、膜厚は０．１〜０．２μｍが好ましい。Examples of the metal film formed on the outer periphery of the metal thin film and the adhesive layer include, but are not limited to, metal films of aluminum, gold, silver and the like. The low-reflection film covering the outer periphery of the adhesive layer may be a metal having a low reflectance, such as chromium oxide, but can be coated with a non-metal that does not generate gas even when baked or baked. Anything is fine.
The formation of the coating of the metal film and the low reflection film is performed by, for example, vacuum evaporation, and the thickness is preferably 0.1 to 0.2 μm.
【００１４】[0014]
【作用】本発明によれば、接着剤の露出した部分が金属
膜または低反射膜で覆われるので、ガスの発生要因がな
くなり、超高真空での使用が可能となる。According to the present invention, since the exposed portion of the adhesive is covered with the metal film or the low reflection film, there is no gas generation factor, and the device can be used in an ultra-high vacuum.
【００１５】[0015]
【実施例】本発明のレプリカ回折格子を製作する工程を
図１に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A process for producing a replica diffraction grating according to the present invention will be described with reference to FIG.
【００１６】先ず、ガラス基板１（石英ガラス：６０ｍ
ｍ×６０ｍｍ×１１．３ｍｍ）にフォトレジストＯＦＰ
Ｒ５０００（東京応化製）を０．４μｍコーティング
し、そこにホログラフィック露光法（レーザー波長４４
１．６ｎｍ）により格子溝（１２００本／ｍｍ）を形成
し、その後、イオンビーム・エッチングによりブレーズ
角４度の溝断面形状が鋸歯状になるようにし、その上に
アルミニウム薄膜（厚さ０．２μｍ）２を真空蒸着し、
マスター回折格子を製作する。この状態が図１（ａ）で
ある。First, a glass substrate 1 (quartz glass: 60 m
m × 60 mm × 11.3 mm)
R5000 (manufactured by Tokyo Ohka) is coated 0.4 μm, and holographic exposure method (laser wavelength 44
A lattice groove (1200 lines / mm) is formed with a thickness of 1.6 nm, and then a groove having a blaze angle of 4 degrees is formed into a sawtooth shape by ion beam etching. 2 μm) 2 is vacuum deposited,
Build a master diffraction grating. This state is shown in FIG.
【００１７】このマスター回折格子にシリコングリコー
スを離形剤として薄い油膜３（厚さ約１ｎｍ）を形成
し、その上にアルミニウム薄膜（厚さ０．２μｍ）４を
真空蒸着する。この状態が図１（ｂ）である。A thin oil film 3 (about 1 nm thick) is formed on the master diffraction grating using silicon glycol as a release agent, and an aluminum thin film (0.2 μm thick) 4 is vacuum-deposited thereon. This state is shown in FIG.
【００１８】次にレプリカ基板（石英ガラス：６０ｍｍ
×６０ｍｍ×１１．３ｍｍ）６を用意し、その表面をフ
レオンなどで洗浄した後、接着剤（耐熱性エポキシ樹
脂）５を塗布する。そして、レプリカ基板６と前述のマ
スター回折格子を接着させる。このとき接着剤５の膜厚
は１０μｍ程度である。接着は、約２４時間、１８０℃
の温度で行う。この状態が図１（ｃ）、（ｄ）である。Next, a replica substrate (quartz glass: 60 mm
(× 60 mm × 11.3 mm) 6 is prepared, the surface thereof is washed with Freon or the like, and then an adhesive (heat resistant epoxy resin) 5 is applied. Then, the replica substrate 6 and the above-mentioned master diffraction grating are bonded. At this time, the thickness of the adhesive 5 is about 10 μm. Bonding at 180 ° C for about 24 hours
At a temperature of This state is shown in FIGS. 1C and 1D.
【００１９】接着硬化後、離形剤３を境にしてレプリカ
基板６を剥離すると、アルミニウム薄膜４はレプリカ基
板６に移りレプリカ回折格子が作製される。このときの
状態が図１（ｅ）である。剥離後、レプリカ回折格子の
表面に残っている離形剤３をフレオンで洗浄し、離形剤
を除去する。但し、このときレプリカ回折格子のエッジ
部は、図２のように接着剤（樹脂層）５が露出した状態
となっており、この状態で使用すると、従来のようにガ
スが発生する。After the adhesive has been cured, when the replica substrate 6 is peeled off at the boundary of the release agent 3, the aluminum thin film 4 is transferred to the replica substrate 6 to form a replica diffraction grating. The state at this time is shown in FIG. After peeling, the release agent 3 remaining on the surface of the replica diffraction grating is washed with Freon to remove the release agent. However, at this time, the edge portion of the replica diffraction grating is in a state where the adhesive (resin layer) 5 is exposed as shown in FIG. 2, and when used in this state, gas is generated as in the conventional case.
【００２０】そこで、本発明では、更に、レプリカ回折
格子の表面及び側面にアルミニウム薄膜（厚さ０．２μ
ｍ）を真空蒸着する。真空蒸着は、レプリカ回折格子を
真空ベルジャ内に収容し、真空度５×１０-6Ｔｏｒｒ、
温度２４℃で、アルミニウムを蒸発させて行う。このと
きの状態が図１（ｆ）である。Therefore, in the present invention, an aluminum thin film (having a thickness of 0.2 μm) is further provided on the surface and side surfaces of the replica diffraction grating.
m) is vacuum deposited. In vacuum deposition, a replica diffraction grating is housed in a vacuum bell jar, and the degree of vacuum is 5 × 10 −6 Torr,
At a temperature of 24 ° C., the aluminum is evaporated. The state at this time is shown in FIG.
【００２１】なお、レプリカ回折格子のエッジ部の反射
率を回折格子の表面より落としたい場合は、先ずアルミ
ニウムより反射率の低い、例えば酸化クロムをレプリカ
回折格子の表面及び側面に真空蒸着し、その後レプリカ
回折格子のエッジ部を覆うようなマスクを回折格子に固
定し、アルミニウムを回折格子の表面に真空蒸着をすれ
ば良い。When it is desired to lower the reflectance at the edge of the replica diffraction grating from the surface of the diffraction grating, first, chromium oxide having a lower reflectance than aluminum, for example, chromium oxide is vacuum-deposited on the surface and side surfaces of the replica diffraction grating. A mask that covers the edges of the replica diffraction grating may be fixed to the diffraction grating, and aluminum may be vacuum-deposited on the surface of the diffraction grating.
【００２２】[0022]
【発明の効果】本発明によれば、ピンホールなど接着剤
の露出した部分が金属膜や低反射膜で覆われるので、ガ
スの発生要因がなくなり、超高真空での使用が可能とな
る。また、低反射膜に金属膜を使うことにより、金属膜
表面が増加することになるので、回折格子が向上する。According to the present invention, the exposed portion of the adhesive, such as a pinhole, is covered with a metal film or a low-reflection film, so that there is no gas generation factor and the device can be used in an ultra-high vacuum. In addition, by using a metal film for the low reflection film, the surface of the metal film increases, so that the diffraction grating is improved.
【図１】本発明の回折格子を製作する工程図FIG. 1 is a process chart for manufacturing a diffraction grating of the present invention.
【図２】低反射膜を蒸着する前のレプリカ回折格子のエ
ッジ部の拡大図FIG. 2 is an enlarged view of an edge portion of a replica diffraction grating before depositing a low reflection film.
１：ガラス基板 ２：アルミニウム薄膜 ３：離形剤 ４：アルミニウム薄膜 ５：耐熱性エポキシ樹脂 ６：レプリカ基板 ７：アルミニウム薄膜 1: glass substrate 2: aluminum thin film 3: mold release agent 4: aluminum thin film 5: heat-resistant epoxy resin 6: replica substrate 7: aluminum thin film
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭50−128536（ＪＰ，Ａ) 特開 昭59−65810（ＪＰ，Ａ) 特開 昭64−4703（ＪＰ，Ａ) 特開 平５−297210（ＪＰ，Ａ) 特開 昭61−292923（ＪＰ，Ａ) 特開 平６−167614（ＪＰ，Ａ) 実開 昭60−107903（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 5/18 G02B 5/08 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-128536 (JP, A) JP-A-59-65810 (JP, A) JP-A-64-4703 (JP, A) 297210 (JP, A) JP-A-61-292923 (JP, A) JP-A-6-167614 (JP, A) JP-A-60-107903 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G02B 5/18 G02B 5/08
Claims (2)
形成し、該金属薄膜とレプリカ基板とを接着剤を介して
圧接した後剥離させ、該金属薄膜をレプリカ基板に反転
接着させてなるレプリカ回折格子において、反転接着さ
せた金属薄膜及び接着剤層の外周に金属膜を被覆形成し
たことを特徴とするレプリカ回折格子1. A replica formed by forming a metal thin film on a grating surface of a master diffraction grating, pressing the metal thin film and a replica substrate through an adhesive, peeling the metal thin film, and inverting the metal thin film to a replica substrate. A replica diffraction grating, wherein a metal film is formed on the outer periphery of a metal thin film and an adhesive layer which are reversely bonded to each other.
接着剤層の外周に低反射膜を被覆形成したことを特徴と
するレプリカ回折格子。2. The replica diffraction grating according to claim 1, wherein
A replica diffraction grating, wherein a low-reflection film is formed on the outer periphery of an adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28940993A JP3307031B2 (en) | 1993-11-18 | 1993-11-18 | Replica diffraction grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28940993A JP3307031B2 (en) | 1993-11-18 | 1993-11-18 | Replica diffraction grating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07140310A JPH07140310A (en) | 1995-06-02 |
| JP3307031B2 true JP3307031B2 (en) | 2002-07-24 |
Family
ID=17742871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28940993A Expired - Fee Related JP3307031B2 (en) | 1993-11-18 | 1993-11-18 | Replica diffraction grating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3307031B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5913698A (en) * | 1997-01-17 | 1998-08-07 | Cymer, Inc. | Reflective overcoat for replicated diffraction gratings |
| US6511703B2 (en) * | 1997-09-29 | 2003-01-28 | Cymer, Inc. | Protective overcoat for replicated diffraction gratings |
| JP5303889B2 (en) * | 2007-10-03 | 2013-10-02 | 株式会社島津製作所 | Replica diffraction grating |
| JP5167298B2 (en) * | 2010-03-16 | 2013-03-21 | アンリツ株式会社 | Ion trap type frequency standard |
| JP6849152B2 (en) | 2018-06-20 | 2021-03-24 | 株式会社島津製作所 | Master diffraction grating manufacturing equipment and manufacturing method |
-
1993
- 1993-11-18 JP JP28940993A patent/JP3307031B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07140310A (en) | 1995-06-02 |
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