JP7306594B1 - 導電性フィルム、巻回体、接続構造体、及び接続構造体の製造方法 - Google Patents
導電性フィルム、巻回体、接続構造体、及び接続構造体の製造方法 Download PDFInfo
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- JP7306594B1 JP7306594B1 JP2023054094A JP2023054094A JP7306594B1 JP 7306594 B1 JP7306594 B1 JP 7306594B1 JP 2023054094 A JP2023054094 A JP 2023054094A JP 2023054094 A JP2023054094 A JP 2023054094A JP 7306594 B1 JP7306594 B1 JP 7306594B1
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Abstract
Description
図1に示すように、巻回体1は、長尺の(テープ状の)異方導電性フィルム2と、異方導電性フィルム2が巻回された巻芯3と、を備える。つまり、巻回体1は、巻芯3に異方導電性フィルム2が巻回されてなる。
図1~図3に示すように、異方導電性フィルム2は、長尺の(テープ状の)剥離フィルム4と、剥離フィルム4上に設けられた複数の導電性を有する接着剤フィルム片5と、を備える。接着剤フィルム片5は、導電性を有するために、接着剤6に導電粒子7が分散されたものである。なお、平面視において、異方導電性フィルム2の外形は、剥離フィルム4の外形により規定される。
図5に示すように、接続構造体10は、第一接着面11aを有する第一回路部材11と、第二接着面12aを有する第二回路部材12と、第一接着面11aと第二接着面12aとを接続する接着剤フィルム片5と、を備える。
図6に示すように、接続構造体の製造方法は、フィルム製造工程(S1)と、フィルム製造工程(S1)の後に行う接続工程(S2)と、を備える。
図19に示すように、変形例1の異方導電性フィルム2Hは、接着剤フィルム片5を覆う第二剥離フィルム片8を更に備えている。つまり、異方導電性フィルム2Hは、長尺の剥離フィルム4と、剥離フィルム4上に設けられて、接着剤6に導電粒子7が分散された複数の接着剤フィルム片5と、各接着剤フィルム片5上に設けられた第二剥離フィルム片8と、を備える。第二剥離フィルム片8は、接着剤フィルム片5の表面を覆うことで接着剤フィルム片5を保護するフィルムである。このため、変形例1では、巻回体1は、この異方導電性フィルム2Hが巻芯3に巻回されてなる。
図21に示すように、変形例2の接続構造体の製造方法では、接続工程(S2)は、位置検出工程(S21)の前に行うフィルム切断工程(S24)を更に備えている。
上記実施形態では、本発明に係る導電性フィルムを、異方導電性を有する異方導電性フィルムに適用したものとして説明したが、本発明に係る導電性フィルムは、異方導電性を有する異方導電性フィルムに限定されるものではない。つまり、接着剤フィルム片及び接着剤フィルム層は、導電性を有していればよく、接着剤に導電粒子が分散されているものでなくてもよい。この場合の接着剤フィルム片及び接着剤フィルム層としては、酸化インジウムスズ(Indium-Tin-Oxide:ITO)、酸化インジュウム、酸化スズ等の金属酸化物、導電性繊維を含むもの、などが挙げられる。この導電性繊維としては、例えば、金、銀、白金等の金属繊維、及びカーボンナノチューブ等の炭素繊維が挙げられる。
Claims (24)
- 長尺の剥離フィルムと、
前記剥離フィルム上に設けられた複数の導電性を有する接着剤フィルム片と、を備え、
前記複数の接着剤フィルム片は、前記剥離フィルムの長手方向に配列されて前記剥離フィルムの長手方向に離間しており、
前記接着剤フィルム片は、導電粒子を含み、
前記接着剤フィルム片は、穴を有する、
導電性フィルム。 - 前記複数の接着剤フィルム片は、同じ形をしている、
請求項1に記載の導電性フィルム。 - 前記複数の接着剤フィルム片は、前記剥離フィルムの幅方向における中央部に配置されている、
請求項1又は2に記載の導電性フィルム。 - 前記複数の接着剤フィルム片は、前記剥離フィルムの幅方向における端部に配置されている、
請求項1~3の何れか一項に記載の導電性フィルム。 - 前記複数の接着剤フィルム片は、前記剥離フィルムの幅方向にも配列されている、
請求項1~4の何れか一項に記載の導電性フィルム。 - 前記剥離フィルムの長手方向における前記複数の接着剤フィルム片の間隔は、0.1mm以上10mm以下である、
請求項1~5の何れか一項に記載の導電性フィルム。 - 前記剥離フィルムの幅方向における前記剥離フィルムの端縁と当該端縁に最も近い前記接着剤フィルム片との間隔は、0.1mm以上10mm以下である、
請求項1~6の何れか一項に記載の導電性フィルム。 - 前記剥離フィルムは、光透過性を有する、
請求項1~7の何れか一項に記載の導電性フィルム。 - 前記剥離フィルムの透過率は、15%以上100%以下である、
請求項8に記載の導電性フィルム。 - 前記剥離フィルムのヘイズ値は、3%以上100%以下である、
請求項8又は9に記載の導電性フィルム。 - 前記接着剤フィルム片上に設けられた第二剥離フィルム片を更に備える、
請求項1~10の何れか一項に記載の導電性フィルム。 - 請求項1~11の何れか一項に記載の導電性フィルムと、
前記導電性フィルムが巻回された巻芯と、を備える、
巻回体。 - 第一接着面を有する第一回路部材と、
第二接着面を有する第二回路部材と、
前記第一接着面と前記第二接着面とを接続する請求項1~11の何れか一項に記載の接着剤フィルム片と、を備える、
接続構造体。 - 長尺の剥離フィルム上に、複数の導電性を有する接着剤フィルム片が設けられるとともに、前記複数の接着剤フィルム片が前記剥離フィルムの長手方向に配列されて前記剥離フィルムの長手方向に離間した導電性フィルムを製造するフィルム製造工程と、
前記導電性フィルムの前記接着剤フィルム片を介して第一回路部材の第一接着面と第二回路部材の第二接着面とを接続する接続工程と、を備え、
前記複数の接着剤フィルム片は、穴を有する、
接続構造体の製造方法。 - 前記接着剤フィルム片は、接着剤に導電粒子が分散されている、
請求項14に記載の接続構造体の製造方法。 - 前記フィルム製造工程は、
前記剥離フィルム上の全面に、導電性を有する接着剤フィルム層を形成する接着剤フィルム層形成工程と、
前記接着剤フィルム層を、前記接着剤フィルム片の外形を成す外形線に沿って切断する接着剤フィルム層切断工程と、
切断された前記外形線に沿って、前記接着剤フィルム層における前記接着剤フィルム片以外の部分となる余白部分を、前記剥離フィルムから剥離する余白剥離工程と、を有する、
請求項14又は15に記載の接続構造体の製造方法。 - 前記接着剤フィルム層は、接着剤に導電粒子が分散されている、
請求項16に記載の接続構造体の製造方法。 - 前記接続工程は、
撮像装置により前記導電性フィルムにおける前記接着剤フィルム片の位置を検出する位置検出工程と、
前記位置検出工程により検出された位置に基づいて、前記接着剤フィルム片を前記第一接着面に貼り付ける貼付工程と、
前記接着剤フィルム片を介して前記第一接着面と前記第二接着面とを重ね合せる重ね合せ工程と、を有する、
請求項14~17の何れか一項に記載の接続構造体の製造方法。 - 前記フィルム製造工程は、前記接着剤フィルム片上に、第二剥離フィルム片が設けられた前記導電性フィルムを製造する、
請求項14又は15に記載の接続構造体の製造方法。 - 前記フィルム製造工程は、
前記剥離フィルム上の全面に、導電性を有する接着剤フィルム層を形成し、更に、前記接着剤フィルム層上の全面に、第二剥離フィルムを被せる接着剤フィルム層形成工程と、
前記接着剤フィルム層及び前記第二剥離フィルムを、前記接着剤フィルム片の外形を成す外形線に沿って切断する接着剤フィルム層切断工程と、
切断された前記外形線に沿って、前記接着剤フィルム層及び前記第二剥離フィルムにおける前記接着剤フィルム片以外の部分となる余白部分を、前記剥離フィルムから剥離する余白剥離工程と、を有する、
請求項19に記載の接続構造体の製造方法。 - 前記接着剤フィルム層は、接着剤に導電粒子が分散されている、
請求項20に記載の接続構造体の製造方法。 - 前記接続工程は、
撮像装置により前記導電性フィルムにおける前記接着剤フィルム片の位置を検出する位置検出工程と、
前記位置検出工程により検出された位置に基づいて、前記接着剤フィルム片を前記第一接着面に貼り付ける貼付工程と、
前記接着剤フィルム片を介して前記第一接着面と前記第二接着面とを重ね合せる重ね合せ工程と、
前記貼付工程の前に、前記接着剤フィルム片から前記第二剥離フィルム片を剥離する第二剥離フィルム片剥離工程と、を有する、
請求項19~21の何れか一項に記載の接続構造体の製造方法。 - 前記貼付工程では、当該接着剤フィルム片を前記第一接着面に貼り付けた後、前記接着剤フィルム片から前記剥離フィルムを剥離する、
請求項18又は22に記載の接続構造体の製造方法。 - 前記接続工程は、前記位置検出工程の前に、前記導電性フィルムを、前記剥離フィルムに1又は複数の前記接着剤フィルム片が設けられた複数の導電性フィルム片に切断するフィルム切断工程を更に有し、
前記位置検出工程では、前記撮像装置により前記導電性フィルム片における前記接着剤フィルム片の位置を検出する、
請求項18,22又は23に記載の接続構造体の製造方法。
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Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
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R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |