| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover tape, which can be heat welded with sufficient adhesive strength to a plastic carrier tape, regardless of the differences of the material of the carrier tape, and has superior transparency. SOLUTION: The cover tape for packaging electronic components can be heat sealed on the plastic carrier tape, on which a series of housing pockets for housing the electronic components are formed. The cover tape is composed of at least two layers consisting of a heat sealing material layer (abbreviated to layer B hereafter) and a base layer, which are formed to put the layer B on the top of the base layer on the surface of the cover tape that is heat sealed on the carrier tape. The layer B is made of a compound composed mainly of ethylene-vinyl acetate-anhydrous maleic acid ternary copolymers or ethylene-ethyl acrylate-anhydrous maleic acid ternary copolymers. COPYRIGHT: (C)2004,JPO&NCIPI
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