| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover tape and packaging body comprising a seal layer which is low in contamination migration to encased objects such as electronic parts and that keeps a stable, sufficient bonding capacity and an anti-static function free from change with time under an environment of high temperature and high humidity, and that is excellent in resistance to blocking and in transparency. SOLUTION: The cover tape is composed of a base sheet and a seal layer provided on the base sheet. The seal layer includes a thermoplastic resin and aπ-electron conjugate type conductive polymer solid-solved in the resin, and the concentration of ionic residual substance of the seal layer is 10 ppm or lower. COPYRIGHT: (C)2004,JPO&NCIPI
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