JP2009289755A - Anisotropic conductive material tape - Google Patents

Anisotropic conductive material tape Download PDF

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JP2009289755A
JP2009289755A JP2009193236A JP2009193236A JP2009289755A JP 2009289755 A JP2009289755 A JP 2009289755A JP 2009193236 A JP2009193236 A JP 2009193236A JP 2009193236 A JP2009193236 A JP 2009193236A JP 2009289755 A JP2009289755 A JP 2009289755A
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anisotropic conductive
tape
conductive material
adhesive
material tape
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JP2009289755A5 (en
JP4844661B2 (en
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Naoki Fukushima
直樹 福嶋
Koji Kobayashi
宏治 小林
Atsuo Nakajima
敦夫 中島
Masajiro Yamazaki
正次郎 山崎
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Showa Denko Materials Co Ltd
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Hitachi Chemical Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an anisotropic conductive material tape for preventing missing of an end tape for automatic detection and transferring to a back side of a substrate in the anisotropic conductive material in the anisotropic conductive material tape when acryl system adhesive is used as the adhesive in the anisotropic conductive material. <P>SOLUTION: The anisotropic conductive material tape which makes the end mark for automatic detection to be a rubber system adhesive tape which is provided on the acryl system adhesive in the anisotropic conductive tape composed of the acryl system adhesive applied to the substrate. It is preferable to have total thickness of the substrate and the adhesive in the rubber system adhesive tape be less than 250 μm as the thickness of the end mark. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、例えば液晶パネル、PDPパネル、ELパネル、ペアチップ実装などの電子部品と回路板、回路板同士を接着固定すると共に、両者の電極同士を電気的に接続する異方導電材テープに関し、特にリールに巻かれた異方導電材の巻き芯部付近に設けた自動検出のためのエンドマークに関する。   The present invention relates to, for example, an anisotropic conductive material tape for bonding and fixing an electronic component such as a liquid crystal panel, a PDP panel, an EL panel, and a pair chip mounting, a circuit board, and circuit boards, and electrically connecting both electrodes. In particular, the present invention relates to an end mark for automatic detection provided in the vicinity of a winding core portion of an anisotropic conductive material wound on a reel.

異方導電材テープによる接続方法として、相対峙する電極間にフィルム状の接着剤である異方導電部材を挟み、加熱加圧することにより接続を行うことが行われている。フィルム状の接着材中には、電極間の導通を得る為の導電粒子が混合され、樹脂としては、熱可塑性樹脂、熱硬化性樹脂、または熱可塑性樹脂と熱硬化性樹脂の混合系が用いられている(例えば、特開昭55−104007号公報参照)。また、導電粒子を含まず、樹脂のみからなる回路接続方法も知られている(例えば、特開昭60−262430号公報)。樹脂の代表的なものには熱可塑性樹脂系としてスチレン樹脂系、ポリエステル樹脂系があり、また熱硬化性樹脂系としてはエポキシ樹脂系、シリコーン樹脂系が知られている。熱可塑性樹脂系、熱硬化性樹脂系共に接続する為に、加熱加圧が必要である。熱可塑性樹脂系では樹脂を流動させ被着体との密着力を得る為に、また熱硬化性樹脂系では更に樹脂の硬化反応を行う為である。近年、接続信頼性の面から、熱可塑性樹脂と熱硬化性樹脂の混合系、熱硬化性樹脂系が主流となっている。近年、被接続体の反り及び伸びを防ぐために異方導電材の接続時の接続温度の低温化が要求されるようになり、また、異方導電材の接続用途の拡大や液晶パネル、PDPパネル、ELパネル、ベアチップ実装などの需要拡大に伴い接続時のタクトタイムの短時間化の要求が、強くなされるようになっている。最近では、上記熱硬化性樹脂系であるエポキシ樹脂系、シリコーン樹脂系より更に低温度・短時間で接続することが可能な反応性の高い熱ラジカル系が脚光を浴びている。この熱ラジカル系は主にアクリル系接着剤で構成されている。一方、異方導電材の接続は用途及び需要拡大に伴い、オ−トメ−ション化されているのが一般的である。その為、異方導電材はテープ状であり、リールの巻芯部分付近の接着剤上に接着剤とは色の異なる粘着テープがエンドテープとして付けられ、自動機がこのエンドテープをセンサーにより感知し、異方導電材テープの欠乏を知らせ、供給を不備なく行っている。従来の技術においては、異方導電材は前述のように熱可塑性樹脂系としてスチレン樹脂系、ポリエステル樹脂系があり、また、熱硬化性樹脂系としてはエポキシ樹脂系、シリコーン樹脂系であり、エンドテープはアクリル系接着剤が使用されていた。しかし、熱ラジカル系であるアクリル系接着剤は同一の接着剤系であるエンドテープのアクリル系接着剤と相溶してしまいリールの側面に粘着剤あるいは異方導電材の接着剤のはみ出しを引き起こし、エンドテープの欠落や異方導電材テープの異方導電材が基材背面へ転写する不都合を引き起こす。   As a connecting method using an anisotropic conductive material tape, an anisotropic conductive member, which is a film-like adhesive, is sandwiched between opposed electrodes and connected by heating and pressing. Conductive particles for obtaining electrical connection between electrodes are mixed in the film-like adhesive, and as the resin, a thermoplastic resin, a thermosetting resin, or a mixed system of a thermoplastic resin and a thermosetting resin is used. (See, for example, JP-A-55-104007). Also known is a circuit connection method that does not contain conductive particles and is made only of a resin (for example, JP-A-60-262430). Typical examples of the resin include a styrene resin system and a polyester resin system as thermoplastic resin systems, and an epoxy resin system and a silicone resin system are known as thermosetting resin systems. Heating and pressing are necessary to connect both the thermoplastic resin system and the thermosetting resin system. This is because the thermoplastic resin system allows the resin to flow to obtain adhesion to the adherend, and the thermosetting resin system further performs a resin curing reaction. In recent years, from the viewpoint of connection reliability, a mixed system of a thermoplastic resin and a thermosetting resin and a thermosetting resin system have become mainstream. In recent years, in order to prevent warpage and elongation of the connected body, it has been required to lower the connection temperature at the time of connecting the anisotropic conductive material, and the use of the anisotropic conductive material has been expanded, and liquid crystal panels and PDP panels. With increasing demand for EL panels, bare chip mounting, etc., there is a strong demand for shortening the tact time at the time of connection. Recently, a highly reactive thermal radical system that can be connected at a lower temperature and in a shorter time than the epoxy resin system and the silicone resin system, which are the thermosetting resin systems, has attracted attention. This thermal radical system is mainly composed of an acrylic adhesive. On the other hand, the connection of anisotropic conductive materials is generally automated with increasing applications and demand. For this reason, the anisotropic conductive material is in the form of a tape, and an adhesive tape with a different color from the adhesive is applied as an end tape on the adhesive near the core of the reel, and the automatic machine detects this end tape with a sensor. However, the shortage of anisotropic conductive material tape is informed, and the supply is performed without flaws. In the prior art, as described above, anisotropic conductive materials include styrene resin and polyester resin as thermoplastic resins, and epoxy resin and silicone resin as thermosetting resins. Acrylic adhesive was used for the tape. However, the thermal adhesive acrylic adhesive is compatible with the end adhesive acrylic adhesive, which is the same adhesive system, causing sticking of adhesive or anisotropic conductive material to the side of the reel. This causes inconvenience that the end tape is missing or the anisotropic conductive material of the anisotropic conductive material tape is transferred to the back surface of the substrate.

特開昭55−104007号公報Japanese Patent Laid-Open No. 55-104007 特開昭60−262430号公報JP 60-262430 A

本発明は、上記欠点に鑑みなされたもので、エンドテープの欠落及び異方導電材テープの異方導電材が基材背面へ転写するのを防止することを目的とした。   The present invention has been made in view of the above-described drawbacks, and has an object of preventing the end tape from being lost and the anisotropic conductive material of the anisotropic conductive material tape from being transferred to the back surface of the base material.

本発明は、基材に塗布されたアクリル系接着剤からなる異方導電材テープにおいて、自動検出のためのエンドマークをアクリル系接着剤上に設けられたゴム系粘着テープとした異方導電材テープである。そして、エンドマークの厚みとして、ゴム系粘着テープの基材と粘着剤の総厚みを250μm未満とすると好ましい異方導電材テープである。異方導電材テープの基材a(3)に塗布されたアクリル系接着剤(2)を用いた異方導電材テープ(1)において、自動機において異方導電材テープの欠乏を知らせるためセンサーにより感知するエンドマーク(4)としてアクリル系接着剤(2)上にゴム系粘着材(5)と基材b(6)から構成されるゴム系粘着剤テープを設けることにより、異方導電材テープのアクリル系接着剤と相溶することなく、エンドテープの欠落や異方導電材テープの異方導電材の基材背面への転写を防止する事が可能となる。エンドマーク(4)の厚みは、ゴム系粘着テープの基材b(6)とゴム系粘着剤(5)の総厚みが250μm未満、好ましくは100μm以下、より好ましくは、70μm以下とすることにより、異方導電材テープの巻き締まりによる異方導電材と粘着剤の側面への流失を防ぎ、エンドテープの欠落及び異方導電材テープの異方導電材の基材背面への転写を防止する事が更に向上する。   The present invention relates to an anisotropic conductive material tape comprising an acrylic adhesive applied to a base material, and an anisotropic conductive material in which an end mark for automatic detection is a rubber-based adhesive tape provided on an acrylic adhesive. It is a tape. And as the thickness of an end mark, it is a preferable anisotropic conductive material tape when the total thickness of the base material of a rubber-type adhesive tape and an adhesive is less than 250 micrometers. Sensor for notifying the lack of anisotropic conductive material tape in an automatic machine in anisotropic conductive material tape (1) using acrylic adhesive (2) applied to base material a (3) of anisotropic conductive material tape By providing a rubber adhesive tape composed of a rubber adhesive (5) and a base material b (6) on an acrylic adhesive (2) as an end mark (4) to be detected by the anisotropic conductive material Without being compatible with the acrylic adhesive of the tape, it is possible to prevent the end tape from being lost or the anisotropic conductive material of the anisotropic conductive material tape from being transferred to the back surface of the base material. The thickness of the end mark (4) is such that the total thickness of the base material b (6) of the rubber-based adhesive tape and the rubber-based adhesive (5) is less than 250 μm, preferably 100 μm or less, more preferably 70 μm or less. , Prevents the anisotropic conductive material and adhesive from flowing out to the side due to tight winding of the anisotropic conductive material tape, prevents the end tape from missing and the anisotropic conductive material tape from transferring to the back of the anisotropic conductive material Things get better.

本発明によれば、異方導電材の接着剤としてアクリル系接着剤を使用した場合に、自動検出のためのエンドマークをゴム系粘着テープとする異方導電材テープ構成にすることにより、エンドテープの欠落や異方導電材テープの異方導電材が基材背面への転写を防止することができる。   According to the present invention, when an acrylic adhesive is used as the anisotropic conductive material adhesive, the end of the end mark for automatic detection is made of an anisotropic conductive material tape with a rubber-based adhesive tape. The lack of the tape or the anisotropic conductive material of the anisotropic conductive material tape can prevent transfer to the back surface of the base material.

本発明の異方導電材テープの全体構成を示す断面模式図。The cross-sectional schematic diagram which shows the whole structure of the anisotropic electrically-conductive material tape of this invention. 本発明の異方導電材テープの一部分を示す断面模式図。The cross-sectional schematic diagram which shows a part of anisotropic conductive material tape of this invention. 本発明の異方導電材テープのエンドテープ部分を示す断面模式図。The cross-sectional schematic diagram which shows the end tape part of the anisotropic conductive material tape of this invention.

本発明を図面を参照しながらさらに具体的に説明する。図1は本発明の一実施例を説明する断面模式図である。図2、図3は、図1の各部の拡大図である。本発明の異方導電材テープ(1)は、基材a(3)上に塗布された異方導電性のアクリル系接着剤(2)からなり、高精細化された電子部品の接続に用いられるため無機及び有機物の異物及び汚染を防ぐため、基材aが接着剤の外側となる構造を示している。本発明に用いられる異方導電材は、被接続体の反り及び伸びを防ぐために接続温度の低温化が可能で、また、接続時のタクトタイムの短時間化が可能である反応性の高いアクリル系接着剤を使用する。さらに、本発明の異方導電材テープに用いられる基材は、強度及び異方導電材を構成する接着剤の剥離性の面からOPP(延伸ポリプロピレン)、ポリテトラフルオロエチレン、シリコン処理したPET(ポリエチレンテレフタレート)などを用いるが、これらに制限するものではない。異方導電材を用いた接続は用途及び需要拡大に伴い、オ−トメション化され、異方導電材の欠乏、すなわち異方導電材がなくなっていることを知らせるため、アクリル系接着剤(2)上にエンドマーク(4)を付けて検知するようにしている。このエンドマークは異方導電テープの製造上の作業性から異方導電材の接着剤とは異なる粘着テープが用いられるのが一般的である。本発明においてアクリル系接着剤(2)の成分が、エンドテープの基材b(6)(一般的には材質としてPETを用いる)上の粘着剤をゴム系粘着剤(5)にすることにより、異方導電材のアクリル系接着剤(2)と相溶せず、エンドテープの欠落や異方導電材テープの異方導電材の基材背面への転写を防止する事が可能である。   The present invention will be described more specifically with reference to the drawings. FIG. 1 is a schematic sectional view for explaining one embodiment of the present invention. 2 and 3 are enlarged views of each part of FIG. The anisotropic conductive material tape (1) of the present invention comprises an anisotropic conductive acrylic adhesive (2) applied on a base material a (3), and is used for connecting highly refined electronic components. Therefore, in order to prevent foreign matter and contamination of inorganic and organic substances, the structure in which the substrate a is outside the adhesive is shown. The anisotropic conductive material used in the present invention is a highly reactive acrylic that can reduce the connection temperature to prevent warpage and elongation of the connected body, and can shorten the tact time at the time of connection. Use adhesives. Furthermore, the base material used for the anisotropic conductive material tape of the present invention is OPP (stretched polypropylene), polytetrafluoroethylene, silicon-treated PET (from the viewpoint of strength and peelability of the adhesive constituting the anisotropic conductive material). Polyethylene terephthalate) or the like is used, but is not limited thereto. Connections using anisotropic conductive materials have become automated as usage and demand expand, and acrylic adhesives (2) are used to inform the lack of anisotropic conductive materials, that is, the absence of anisotropic conductive materials. An end mark (4) is attached to the top so as to be detected. As the end mark, a pressure-sensitive adhesive tape different from the anisotropic conductive material adhesive is generally used because of the workability in manufacturing the anisotropic conductive tape. In the present invention, the component of the acrylic adhesive (2) is obtained by changing the adhesive on the base material b (6) of the end tape (generally using PET as a material) to the rubber adhesive (5). In addition, it is incompatible with the acrylic adhesive (2) of the anisotropic conductive material, and it is possible to prevent the end tape from being lost or the anisotropic conductive material of the anisotropic conductive material tape from being transferred to the back surface of the base material.

本発明は、基材a(3)に塗布されたアクリル系接着剤(2)を用いた異方導電材テープ(1)において、自動機において異方導電材テープ(1)の欠乏を知らせるためセンサーにより感知するエンドマーク(4)としてアクリル系接着剤上にゴム系粘着剤テープを設けることにより、異方導電材のアクリル系接着剤と相溶せず、エンドテープの欠落や異方導電材テープの異方導電材の基材背面への転写を防止する事が可能である。   In the present invention, the anisotropic conductive material tape (1) using the acrylic adhesive (2) applied to the substrate a (3) is used to inform the lack of the anisotropic conductive material tape (1) in an automatic machine. By providing a rubber adhesive tape on the acrylic adhesive as the end mark (4) detected by the sensor, it is not compatible with the acrylic adhesive of the anisotropic conductive material. It is possible to prevent the anisotropic conductive material of the tape from being transferred to the back surface of the base material.

次に実施例を説明するが、本発明はこの実施例に限定されるものではない。
(l)異方導電材テープの作製
フイルム形成材としてフェノキシ樹脂(高分子量エポキシ樹脂)50gとアクリル系樹脂であるアクリレート50g、過酸化物を5g添加し、酢酸エチルの30重量%溶液を作製し,これに平均粒径2.5μmのNi粉を5体積%添加した。この溶液を厚み50μmのシリコン処理したポリエチレンテレフタレートフィルム基材にロールコータで塗布し、110℃、20分乾燥し、厚み50μmの異方導電材フィルムを得た。さらに、このフィルムを幅5mmにスリットして、長さ50mの異方導電材テープを得た。
(2)評価
試験として2枚のスライドガラスの間に2枚の異方導電材フィルムをテープに巻かれた状態となる構成で挟み、2枚の異方導電材フィルムの間に表1に示す各種の粘着剤系のテープをエンドテープとして挟み1Kgの荷重をかけ、23℃で10日間放置し、エンドテープの欠落や異方導電材テープの異方導電材の基材背面への転写を総合評価した。この時の試験片のサイズは10×73mmとした。更に、実際にテープ長50mの異方導電材テープを用いて、23℃、10日間放置して評価した。その結果、エンドテープの欠落や異方導電材テープの異方導電材の基材背面への転写があったものは×で、ないものは○で示した。評価結果を表1に示した。
Next, although an Example is described, this invention is not limited to this Example.
(L) Preparation of anisotropic conductive material tape 50 g of phenoxy resin (high molecular weight epoxy resin), 50 g of acrylic resin acrylate and 5 g of peroxide were added as a film forming material to prepare a 30 wt% solution of ethyl acetate. , 5% by volume of Ni powder having an average particle size of 2.5 μm was added thereto. This solution was applied to a silicon-treated polyethylene terephthalate film substrate having a thickness of 50 μm with a roll coater and dried at 110 ° C. for 20 minutes to obtain an anisotropic conductive material film having a thickness of 50 μm. Further, this film was slit to a width of 5 mm to obtain an anisotropic conductive material tape having a length of 50 m.
(2) As an evaluation test, two anisotropic conductive material films are sandwiched between two slide glasses in a configuration wound on a tape, and are shown in Table 1 between the two anisotropic conductive material films. Put various adhesive tapes as end tapes, apply a 1kg load and leave them at 23 ° C for 10 days to comprehensively transfer end tapes and anisotropic conductive material tapes to the back of the base material. evaluated. The size of the test piece at this time was 10 × 73 mm. Further, an anisotropic conductive material tape having a tape length of 50 m was actually used for evaluation at 23 ° C. for 10 days. As a result, when the end tape was missing or when the anisotropic conductive material of the anisotropic conductive material tape was transferred to the back surface of the base material, the result was x, and when it was not, the result was indicated by ◯. The evaluation results are shown in Table 1.

Figure 2009289755
Figure 2009289755

実施例1のNo.31Eをエンドマークとして使用した場合、試験においてエンドテープの粘着剤及びアクリル系接着剤のハミダシは観察されなかった。また、実際のテープにおいても側面にハミダシはなく、テープを引き出した時、エンドテープの欠落及び異方導電材テープの異方導電材の基材背面への転写はなかった。一方、比較例1においては、実施例1と同様の評価を行ったが、異方導電材の接着剤とエンドテープの粘着剤が相溶し、試験においてハミダシが観察され、実際のテープにおいても側面にハミダシが発生し、テープを引き出した時、エンドテープの欠落及び異方導電材の異方導電材の基材背面への転写が起こった。実施例2〜3においても実施例1同様に評価した所良好な結果が得られた。比較例2においては、比較例1と同様はみ出しが観察された。比較例3においては、エンドテープの厚みが厚いため、比較例1と同様はみ出しが観察された。   No. of Example 1 When 31E was used as an end mark, no end tape adhesive or acrylic adhesive was observed in the test. Further, even in an actual tape, there was no edge on the side surface, and when the tape was pulled out, there was no missing end tape and no transfer of the anisotropic conductive material of the anisotropic conductive material tape to the back surface of the base material. On the other hand, in Comparative Example 1, the same evaluation as in Example 1 was performed, but the adhesive of the anisotropic conductive material and the pressure sensitive adhesive of the end tape were compatible, and stagnation was observed in the test. When the tape was pulled out, the side tape was removed and the end tape was missing and the anisotropic conductive material was transferred to the back surface of the anisotropic conductive material. In Examples 2 to 3, good results were obtained when evaluated in the same manner as in Example 1. In Comparative Example 2, the protrusion was observed as in Comparative Example 1. In Comparative Example 3, since the end tape was thick, the protrusion was observed as in Comparative Example 1.

1.異方導電材テープ
2.アクリル系接着剤
3.基材a
4.エンドマーク
5.ゴム系粘着剤
6.基材b
1. 1. Anisotropic conductive material tape 2. Acrylic adhesive Base material a
4). End mark 5. Rubber adhesive 6. Base material b

Claims (2)

基材に塗布されたアクリル系接着剤からなる異方導電材テープにおいて、自動検出のためのエンドマークをアクリル系接着剤上に設けられたゴム系粘着テープとした異方導電材テープ。   An anisotropic conductive material tape comprising a rubber adhesive tape provided with an end mark for automatic detection on an acrylic adhesive in an anisotropic conductive material tape made of an acrylic adhesive applied to a substrate. エンドマークの厚みとして、ゴム系粘着テープの基材と粘着剤の総厚みを250μm未満とした請求項1に記載の異方導電材テープ。   The anisotropic conductive material tape according to claim 1, wherein the thickness of the end mark is such that the total thickness of the base material and the adhesive of the rubber-based adhesive tape is less than 250 μm.
JP2009193236A 2009-08-24 2009-08-24 Anisotropic conductive tape Expired - Fee Related JP4844661B2 (en)

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JPH1173818A (en) * 1997-08-28 1999-03-16 Ricoh Co Ltd Conductive particle, anisotropic conductive adhesive and liquid crystal display device
JPH11279511A (en) * 1998-03-31 1999-10-12 Hitachi Chem Co Ltd Circuit connection material, connected structure of circuit terminal, and method for connecting circuit terminal

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JPH058567A (en) * 1991-07-02 1993-01-19 Dainippon Printing Co Ltd Self-adhesive tape for end mark
JPH07270742A (en) * 1994-03-30 1995-10-20 Matsushita Electric Ind Co Ltd Tape press-bonding device
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Publication number Priority date Publication date Assignee Title
KR20170102350A (en) 2015-02-27 2017-09-08 데쿠세리아루즈 가부시키가이샤 Reel, film connecting body, film winding mounting body and manufacturing method of film connecting body
KR20190035956A (en) 2015-02-27 2019-04-03 데쿠세리아루즈 가부시키가이샤 Reel body, film connection body, film winding body, and manufacturing method for film connection body

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