JPH01165054A - Production of information recording substrate - Google Patents
Production of information recording substrateInfo
- Publication number
- JPH01165054A JPH01165054A JP32432287A JP32432287A JPH01165054A JP H01165054 A JPH01165054 A JP H01165054A JP 32432287 A JP32432287 A JP 32432287A JP 32432287 A JP32432287 A JP 32432287A JP H01165054 A JPH01165054 A JP H01165054A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- substrate
- resin
- information recording
- recording medium
- 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.)
- Pending
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 23
- 238000005304 joining Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 abstract description 17
- 239000011521 glass Substances 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 230000008602 contraction Effects 0.000 abstract 1
- 229920006332 epoxy adhesive Polymers 0.000 abstract 1
- 229920002120 photoresistant polymer Polymers 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 229920005992 thermoplastic resin Polymers 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000000016 photochemical curing Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- ULKLGIFJWFIQFF-UHFFFAOYSA-N 5K8XI641G3 Chemical compound CCC1=NC=C(C)N1 ULKLGIFJWFIQFF-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 206010040925 Skin striae Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 etc. Polymers 0.000 description 1
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VYKXQOYUCMREIS-UHFFFAOYSA-N methylhexahydrophthalic anhydride Chemical compound C1CCCC2C(=O)OC(=O)C21C VYKXQOYUCMREIS-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は情報記録媒体用基板を注型成形法により製造す
る方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a substrate for an information recording medium by a cast molding method.
従来、情報記録媒体用基板にはその情報記録面にトラッ
キング用溝、情報用ピットなどの凹凸プレフォーマット
が形成されている。このように基板に凹凸を形成する方
法としては、■基板が熱可塑性樹脂からなる場合には、
インジェクション法や熱プレス法によりスタンパ−型の
トラック溝を転写する方法、又は、■熱硬化性樹脂、熱
可塑性樹脂からなる透明樹脂板上に光硬化性樹脂組生物
を塗布した後、スタンパ−型を密着させて透明樹脂板側
から紫外線の如きエネルギーを付与し、前記光硬化性樹
脂組成物を硬化させてスタンパ−型のレプリカを透明樹
脂板に転写する、いわゆる２Ｐ法による方法、或いは■
樹脂のモノマー又は溶剤を含んだプレポリマーを注型成
形する際に、片側あるいは両側にトラック溝があらかじ
め形成されている注型用型を用いて注型成形する方法等
が知られている。例えば、特開昭５７−５５５０４号公
報。Conventionally, an uneven preformat such as tracking grooves and information pits is formed on the information recording surface of a substrate for an information recording medium. As for the method of forming irregularities on the substrate in this way, ■If the substrate is made of thermoplastic resin,
A method of transferring the track grooves of the stamper mold by an injection method or a hot press method, or a method of applying a photocurable resin composition onto a transparent resin plate made of thermosetting resin or thermoplastic resin, and then applying the stamper mold A method using the so-called 2P method, in which the stamper type replica is transferred to the transparent resin plate by applying energy such as ultraviolet rays from the transparent resin plate side to harden the photocurable resin composition, or
When cast-molding a prepolymer containing a resin monomer or a solvent, a method is known in which a casting mold is used in which track grooves are previously formed on one or both sides. For example, Japanese Patent Application Laid-Open No. 57-55504.
特開昭５８−１３０４５０号公報など。JP-A-58-130450, etc.
しかしながら、前記■のインジェクション法や熱プレス
法によって得られる熱可塑性樹脂基板は、成形の際の熱
履歴による残留応力や分子の配向により、成形後の基板
のそりや光学的異方性が生じたりするため、情報記録媒
体用基板として問題が残されている。However, thermoplastic resin substrates obtained by the injection method or heat press method described in (2) above may warp or optical anisotropy after molding due to residual stress and molecular orientation due to thermal history during molding. Therefore, problems remain as a substrate for information recording media.
また、前記■の２Ｐ法により得られる基板は、光硬化後
の樹脂内に、光硬化の際に使用する重合開始剤やモノマ
ーが残留しやす（、それらが記録媒体の光記録層に影響
を及ぼし、記録特性の劣化が生じるという問題がよく発
生する。In addition, in the substrate obtained by the 2P method described in (2) above, the polymerization initiator and monomer used during photocuring tend to remain in the resin after photocuring (these may affect the optical recording layer of the recording medium). The problem often arises that the recording characteristics deteriorate.
これらの問題の生じない情報記録媒体用基板の製造方法
として、前記■の注型成形法がよ（用いられる。この方
法により得られる基板は、上記の■、■の方法に比較し
て成形時に圧力がほとんど加わらず、また注型用樹脂と
して、熱可塑性樹脂、熱硬化性樹脂、光硬化性樹脂のい
ずれの樹脂も利用することが可能なため、記録層に悪影
響を及ぼさない樹脂の選択が可能である。As a method for manufacturing substrates for information recording media that does not cause these problems, the above-mentioned cast molding method (①) is often used. Almost no pressure is applied, and any resin such as thermoplastic resin, thermosetting resin, or photocuring resin can be used as the casting resin, so it is possible to select a resin that does not have a negative effect on the recording layer. It is possible.
前記■の注型成形法において、注型成形する際のトラッ
キング用溝、情報用ピットなどの凹凸プレフォーマット
に対応する凹凸パターンを有する型としては、ガラス板
上にフォトリソ工程により、それらの凹凸をパターニン
グしたもの、レーザーカットによりパターニングしたも
の、又はガラス板、金属板上に尖端を有するダイヤモン
ド針によるダイレクトカットにより凹凸を形成したもの
等が知られている。In the cast molding method described in (2) above, the mold has an uneven pattern corresponding to the uneven preformat such as tracking grooves and information pits during cast molding. There are known those that are patterned, those that are patterned by laser cutting, and those that have irregularities formed on a glass plate or metal plate by direct cutting with a diamond needle having a tip.
しかしながら、注型成形における問題点として、基板を
製造する際の１回の処理時間が非常に長いため生産性が
低いことがあげられる。したがって、生産性の向上を目
的として、上記の注型成形に使用する型としては、複数
個取りの型が要求されている。しかし、上述した様に、
注型用型へ凹凸を成形するためには微細な加工が必要と
されているため、複数個取りの型を製作する場合、その
製造コストは非常に高価なものとなる欠点がある。However, a problem with cast molding is that productivity is low because one processing time when manufacturing a substrate is very long. Therefore, for the purpose of improving productivity, a multi-cavity mold is required as a mold used in the above-mentioned cast molding. However, as mentioned above,
Since fine machining is required to form irregularities on a casting mold, the manufacturing cost is extremely high when manufacturing a mold with multiple molds.
本発明は、この様な従来技術の欠点を改善するためにな
されたものであり、注型用型の耐久性を向上し、光学的
に等方でそりがなく、表面が平坦で平滑な情報記録媒体
用基板を生産性よく製造す本発明は、情報記録媒体用基
板の凹凸プレフォーマットに対応する凹凸パターンを表
面に有するユニット同士を水で測定した接触角が１００
°以上である部材を介して接合してなる注型用型に液状
樹脂を注入し、−固化せしめた後、脱型することを特徴
とする情報記録媒体用基板の製造方法である。The present invention has been made in order to improve the drawbacks of the prior art, and improves the durability of the casting mold, and creates a mold that is optically isotropic, has no warpage, and has a flat and smooth surface. The present invention, which manufactures substrates for recording media with high productivity, has a contact angle of 100 when measured with water between units having a concavo-convex pattern on the surface corresponding to the concavo-convex preformat of the substrate for information recording media.
This is a method of manufacturing a substrate for an information recording medium, characterized in that a liquid resin is injected into a casting mold formed by joining via a member having a temperature of at least 100° C., and then removed from the mold after being solidified.
即ち、本発明の製造方法においては、情報記録媒体用基
板の凹凸プレフォーマットに対応する凹凸パターンを表
面に有するユニット同士を接合しまた注型用型を用いて
注型するものであるから、−回の成形プロセスで接合す
るユニットの数にも比例して情報記録媒体用基板が製造
できると共に、ユニット同士の接合によりユニットが成
形加工時に受ける機械的衝撃に対して損傷を受けにく（
なる。That is, in the manufacturing method of the present invention, units having a concavo-convex pattern on their surfaces corresponding to the concave-convex preformat of the information recording medium substrate are bonded together and cast using a casting mold. Information recording medium substrates can be manufactured in proportion to the number of units bonded in one molding process, and the units are less susceptible to damage from mechanical shocks received during the molding process by bonding the units together.
Become.
また、さらに、ユニット同士を接合する部材が注型され
る樹脂に対する離型性に優れるので注型後の脱型も容易
になる。このように、本発明は注型用型の耐久性を向上
し、光学的に等方でそりがな（、表面が平坦で平滑な情
報記録媒体用基板を生産性よく製造する方法を提供でき
るものである。Furthermore, since the member that joins the units has excellent mold releasability with respect to the cast resin, demolding after casting is also facilitated. As described above, the present invention improves the durability of casting molds, and provides a method for efficiently manufacturing substrates for information recording media that are optically isotropic and have a flat and smooth surface. It is something.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明は、例えば光記録媒体のトラッキング用溝、情報
用ピットなどの凹凸プレフォーマットの形状と逆の断面
形状である凹凸パターンを有する複数個取りの注型用型
を用いて、注型成形法により情報記録媒体用基板を製造
する方法であるが、該複数個取りの注型用型としては１
面ないし複数面を単位とするユニットを複数配置し、接
合した構造からなる複数個取りの型からなることを特徴
とする。The present invention provides a cast molding method using a multi-cavity casting mold having a concavo-convex pattern having a cross-sectional shape that is opposite to the shape of a concave-convex preformat such as tracking grooves and information pits of an optical recording medium. This is a method of manufacturing a substrate for an information recording medium using a method for manufacturing a substrate for an information recording medium.
It is characterized by a multi-piece mold having a structure in which a plurality of units each having a surface or multiple surfaces are arranged and joined together.
これらのユニットの面数は、トラッキング用溝。These units have tracking grooves.
情報用ピット等を形成して製造される情報記録媒体用基
板の歩留り、コスト等により決定される。例えば、光カ
ード用基板を製造する場合の注型用型は、６インチのレ
ーザー露光機により２面のパターニングが可能であるた
め、この２面を１つのユニットとして使用し、該ユニッ
トを複数個接合することにより、２の倍数側取りの注型
用型が作製される。It is determined by the yield, cost, etc. of the information recording medium substrate manufactured by forming information pits and the like. For example, when manufacturing optical card substrates, a casting mold can be patterned on two sides using a 6-inch laser exposure machine, so these two sides can be used as one unit, and multiple units can be patterned. By joining, a casting mold with a multiple of 2 sides is produced.
また、これらのユニットの接合は、機械的な接合や接着
剤による接合で行われる。この接合部材としては、注型
成形する際の熱、圧力によるストレス、さらに硬化する
樹脂の収縮による応力のくり返しに耐え、かつユニット
の交換を容易に行うことを満足する必要がある。この様
な接合部材の種類として、本発明においては、水で測定
した接触角が１００°以上の接合部材を用いる。接触角
が１００°以上の熱は注型成形後の離型が良好である。Further, these units are joined by mechanical joining or adhesive joining. This joining member must be able to withstand repeated stress due to heat and pressure during cast molding, as well as stress due to shrinkage of the hardening resin, and must be able to easily replace the unit. In the present invention, as a type of such a joining member, a joining member having a contact angle measured with water of 100° or more is used. Heat with a contact angle of 100° or more allows for good mold release after cast molding.
特に良好な接合部材は接触角が１１０°以上のものであ
る。Particularly good bonding members have a contact angle of 110° or more.
なお、本発明における接触角はコンタクト−アングルメ
ーターＣＡ−Ｄ （協和界面科学製）を用いて２０±２
℃に保った室内で測定した値によるものである。The contact angle in the present invention was determined to be 20±2 using a contact angle meter CA-D (manufactured by Kyowa Interface Science).
The values are based on measurements taken indoors kept at ℃.
以上の様にして作製された注型用型を用いて、該注型用
型に液状樹脂を通常の注型法により、注入し、固、化せ
しめた後、脱型することにより情報記録媒体用基板を得
ることができる。Using the casting mold produced as described above, liquid resin is injected into the casting mold by a normal casting method, solidified and solidified, and then removed from the mold to create an information recording medium. A substrate for use can be obtained.
本発明における注型用型に注入される液状樹脂は、未硬
化の熱硬化性樹脂、光硬化性樹脂もしくは未重合の熱可
塑性樹脂が用いられ、例えば、熱硬化性樹脂ではフェノ
ール樹脂、エポキシ樹脂、ポリエステル系樹脂等、熱可
塑性樹脂ではアクリル樹脂。The liquid resin injected into the casting mold in the present invention is an uncured thermosetting resin, a photocurable resin, or an unpolymerized thermoplastic resin. For example, thermosetting resins include phenolic resin, epoxy resin, etc. , polyester resins, etc., and thermoplastic resins such as acrylic resins.
ビニル樹脂、スチール樹脂、ポリカーボネート樹脂。Vinyl resin, steel resin, polycarbonate resin.
酢酸樹脂、ポリエステル系樹脂等が挙げられる。Examples include acetic acid resin and polyester resin.
この様にして、本発明の製造方法によれば、表面が平坦
で平滑な基板を、大面°積でしかも多量にかつ簡単で安
価に、しかもトラッキング用溝、情報用ビットの形状が
良好な記録再生型の情報記録媒体用基板を得ることがで
きる。In this way, according to the manufacturing method of the present invention, a substrate with a flat and smooth surface can be easily and inexpensively produced in large quantities, and the tracking grooves and information bits can be formed in good shape. A recording/reproducing type information recording medium substrate can be obtained.
本発明の製造方法においては、複数個取りの注型用型が
、複数の各ユニットを作製したのちに、接触角が１００
°以上の部材を用いて着脱可能に接合して形成されてい
るため、従来の一枚の型に複数のパターン面を形成する
方法に比べ、注型用型は繰り返し使用でも離型性が良く
、その耐久性を充分に備え、また注型用型の製作コスト
は安価で歩留りも良く、生産性がよい。In the manufacturing method of the present invention, after producing a plurality of units, the plurality of casting molds have a contact angle of 100.
Compared to the conventional method of forming multiple pattern surfaces on a single mold, casting molds have better mold releasability even after repeated use. , has sufficient durability, and the manufacturing cost of the casting mold is low, yield is good, and productivity is good.
さらに、これらのユニットは面欠陥が生じた場合、ユニ
ット単位で個別に交換が可能であるため、従来の一枚の
型面に複数のパターン面を有する複数個取りの型に面欠
陥が生じた場合にはコストメリットが低下するのに比べ
、コスト的に有利である。Furthermore, if a surface defect occurs in these units, each unit can be replaced individually, so conventional multi-cavity molds with multiple pattern surfaces on a single mold surface have surface defects. It is advantageous in terms of cost compared to the case where the cost benefit decreases.
以下、実施例を示し本発明をさらに具体的に説明する。 Hereinafter, the present invention will be explained in more detail with reference to Examples.
對［１
第１図〜第５図は本発明の情報記録媒体用基板の製造方
法の一実施例を示す工程図である。図はいずれも基板の
断面図を示す。卍[1 FIGS. 1 to 5 are process diagrams showing one embodiment of the method for manufacturing a substrate for an information recording medium of the present invention. All figures show cross-sectional views of the substrate.
以下、断面に基づき製造工程を順に説明する。まず、第
１図において、高精度の溝がフォトリソ工程によって形
成されたガラス板からなるユニットｌを複数用意し、そ
れぞれを１ユニツトとした。Hereinafter, the manufacturing process will be explained in order based on the cross section. First, in FIG. 1, a plurality of units 1 made of glass plates on which highly accurate grooves were formed by a photolithography process were prepared, and each unit was made into one unit.
次に、第２図において、上記ユニット１を接合部材２で
互いに接着した。本実施例では、接合部材はシリコーン
接着剤を使用したが、他の実施例としてフッ素樹脂系接
着剤でも使用可能である。また各ユニットｌの位置精度
、型としての剛性を出すため、各ユニットｌの裏にエポ
キシ系、シリコーン系。Next, in FIG. 2, the units 1 were adhered to each other with a joining member 2. In this embodiment, a silicone adhesive was used as the bonding member, but a fluororesin adhesive may also be used in other embodiments. In addition, in order to improve the positional accuracy of each unit and the rigidity of the mold, epoxy and silicone are used on the back of each unit.
ポリエステル系およびアクリル系などの接着剤３を介し
て裏うち用部材４を接着することが望ましい。It is desirable to adhere the backing member 4 via an adhesive 3 such as polyester or acrylic.
裏うち用部材４としては、厚み、精度と平面度の出たガ
ラス板または金属を使用した。As the backing member 4, a glass plate or metal with good thickness, precision and flatness was used.
次に、第３図に示す様に、上記の様にして得られた型と
表面を光学研磨した他のガラス板５を対向するように設
置し、周辺にスペーサー６を設けてセルを組み立てた。Next, as shown in FIG. 3, the mold obtained as described above and another glass plate 5 whose surface was optically polished were placed so as to face each other, spacers 6 were provided around the periphery, and the cell was assembled. .
該セルに液状樹脂７として、以下の配合組成の液状エポ
キシ樹脂を注入し、１００℃、１０時間硬化させた。A liquid epoxy resin having the following composition was injected into the cell as liquid resin 7, and cured at 100° C. for 10 hours.
ビスフェノールＡ型エポキシ樹脂 １００重量部メチ
ルへキサヒドロ
フタール酸無水物 ８８重量部
２−エチル−４−メチルイミダゾール ０．５重量部
２．６−ジ−ターシャリ−
ブチル−ｐ−クレゾール １．０重量部次に、第４
図に示す様に型から脱型した後、複数面側取りの基板を
所定の大きさに切断し、情報記録媒体用基板９を得た。Bisphenol A type epoxy resin 100 parts by weight Methylhexahydrophthalic anhydride 88 parts by weight 2-ethyl-4-methylimidazole 0.5 parts by weight 2.6-di-tert-butyl-p-cresol 1.0 parts by weight Part number 4
After being removed from the mold as shown in the figure, the multi-sided side-cut substrate was cut into a predetermined size to obtain an information recording medium substrate 9.
（第５図参照）尚、得られん情報記録媒体用基板の複屈
折を調々た所、ｆて５４ ｍｍ 、よこ８６ ｍｍ 、
厚さ０．４ｍｍのカード基板内の位相差は０．１〜５ｎ
ｍであり、又基板の離型性の悪さによるみや（りなどが
無くそりも見られなかった。(See Figure 5) When we investigated the birefringence of the substrate for information recording media, we found that f is 54 mm, width is 86 mm,
The phase difference within a card board with a thickness of 0.4 mm is 0.1 to 5n.
m, and there were no scratches or warpage due to poor mold releasability of the substrate.
支隻１」 レーザーカットにより表面にトラッキング用溝。Branch ship 1” Tracking grooves are laser cut on the surface.
情報用ビットが形成されたニッケルの板からなるユニッ
トを複数用意し、次いでこれらのユニットを接合部材で
接合した。この接合部材は例えばシリコーン樹脂製、テ
フロン樹脂製等のいずれも接触角が１００°以下の樹脂
でできているが、注型時の液状樹脂がもれないようにシ
ーリングが十分に行われる部材であり、かつ着脱可能な
構造を有している。A plurality of units made of nickel plates on which information bits were formed were prepared, and then these units were joined together using a joining member. This joining member is made of resin with a contact angle of 100° or less, such as silicone resin or Teflon resin, but it is a material that provides sufficient sealing to prevent liquid resin from leaking during casting. It has a removable structure.
以上のようにして得られた注型用型を用いて、実施例１
と同様にセルを組みたて、液状樹脂として以下の配合組
成のアクリル樹脂を注入し、１３０℃６時間で重合させ
た。Example 1 Using the casting mold obtained as above,
A cell was assembled in the same manner as above, and an acrylic resin having the following composition was injected as a liquid resin, and polymerized at 130°C for 6 hours.
（配合成分）
メタクリル酸メチル ７０重量部メタクリ
ル酸ターシャリブチル ２５重量部ポリエチレングリ
コールジメタクリレート（分子量６２０） ５重量
部
次に、型から脱型した後、複数面側取りの基板を所定の
大きさに切断し、情報記録媒体用基板を得た。(Ingredients) Methyl methacrylate 70 parts Tert-butyl methacrylate 25 parts Polyethylene glycol dimethacrylate (molecular weight 620) 5 parts Next, after demolding from the mold, the multi-sided side-cut substrate was cut into a predetermined size. A substrate for an information recording medium was obtained.
尚、得られた情報記録媒体用基板の複屈折を実施例１と
同様に調べたところ、カード基板内の位相差は０．１〜
３ｎｍであり、又、基板は離型性の悪さによるみやくり
は無（、そのそりは見られなかった。In addition, when the birefringence of the obtained information recording medium substrate was examined in the same manner as in Example 1, the phase difference within the card substrate was 0.1 to 0.1.
3 nm, and the substrate had no defects due to poor mold releasability (no warpage was observed).
次の第１表はユニットを接合する種々の部材を用いた場
合の評価を示したものである。Table 1 below shows evaluations when various members were used to join the units.
表より水の接触角１００°以上であるフッ素系、シリコ
ーン系の接着剤では評価９０であるが、エチレン系以下
接触角１００°未満である接着剤では評価第１表
＊評価は得られた基板の脈理の有無、そりの有無を全数
検査し、合格品の歩留りを％で示した。From the table, fluorine-based and silicone-based adhesives with a water contact angle of 100° or more have a rating of 90, but ethylene-based adhesives with a contact angle of less than 100° are evaluated in Table 1. All products were inspected for the presence of striae and warpage, and the yield of acceptable products was expressed as a percentage.
以上説明した様に、本発明の製造方法によれば、表面に
みや（りがなく平坦で平滑な情報記録媒体用基板を得る
ことができる。As explained above, according to the manufacturing method of the present invention, it is possible to obtain a flat and smooth information recording medium substrate without any blemishes on the surface.
また、個々のユニットから成る注型用型を用いて注型成
形を行い情報記録媒体用基板を製造することによって、
注型成形の欠点であった生産性の向上を計ることができ
た。さらに、注型用型の耐久性を向上することができた
。In addition, by manufacturing substrates for information recording media by performing cast molding using casting molds consisting of individual units,
We were able to improve productivity, which was a drawback of cast molding. Furthermore, the durability of the casting mold could be improved.
第１図〜第５図は本発明の情報記録媒体用基板の製造方
法の一実施例を示す工程図である。
ｌ・・・ユニット ２・・・接合部材３・・・
接着剤 ４・・・裏うち用部材５・・・ガラ
ス板 ６・・・スペーサー７・・・液状樹脂
８・・・注ぎ口９・・・情報記録媒体用基板FIGS. 1 to 5 are process diagrams showing one embodiment of the method for manufacturing an information recording medium substrate of the present invention. l...Unit 2...Joining member 3...
Adhesive 4...Backing member 5...Glass plate 6...Spacer 7...Liquid resin
8... Spout 9... Information recording medium substrate
Claims (1)
応する凹凸パターンを表面に有するユニット同士を水で
測定した接触角が１００゜以上である部材を介して接合
してなる注型用型に液状樹脂を注入し、固化せしめた後
、脱型することを特徴とする情報記録媒体用基板の製造
方法。(1) The liquid is placed in a casting mold made by joining units having a concavo-convex pattern on their surfaces that corresponds to the concavo-convex preformat of the information recording medium substrate through a member whose contact angle is 100° or more when measured with water. A method for manufacturing a substrate for an information recording medium, which comprises injecting a resin, allowing it to solidify, and then removing the mold.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32432287A JPH01165054A (en) | 1987-12-21 | 1987-12-21 | Production of information recording substrate |
| DE19883850723 DE3850723T2 (en) | 1987-09-05 | 1988-08-31 | Form for manufacturing an information storage medium and method for manufacturing an information storage medium. |
| EP19880308070 EP0308104B1 (en) | 1987-09-05 | 1988-08-31 | Mold for molding of substrate for information recording medium and method for preparing substrate for information recording medium |
| US07/622,151 US5174937A (en) | 1987-09-05 | 1990-12-03 | Method for molding of substrate for information recording medium and method for preparing substrate for information recording medium |
| US07/941,172 US5344304A (en) | 1987-09-05 | 1992-09-04 | Mold for molding of substrate for information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32432287A JPH01165054A (en) | 1987-12-21 | 1987-12-21 | Production of information recording substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01165054A true JPH01165054A (en) | 1989-06-29 |
Family
ID=18164496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32432287A Pending JPH01165054A (en) | 1987-09-05 | 1987-12-21 | Production of information recording substrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01165054A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008245940A (en) * | 2007-03-30 | 2008-10-16 | Inaba Denki Sangyo Co Ltd | Heat-resistant material for fire compartment |
-
1987
- 1987-12-21 JP JP32432287A patent/JPH01165054A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008245940A (en) * | 2007-03-30 | 2008-10-16 | Inaba Denki Sangyo Co Ltd | Heat-resistant material for fire compartment |
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