Abstract The present invention relates to a tape for encasing electronic parts. In conventional packages for encasing electronic parts, a film made of polyester resin is used as a cover tape. Peeling of the polyester cover tape from a carrier tape cannot be effected smoothly because the peeling adhesivity between the cover tape and the carrier tape is not uniform. This invention provides a tape for encasing electronic parts comprising a carrier tape having a plurality of recesses for encasing electronic parts and a plurality of guide perforations, and a cover tape pasted onto said carrier tape with an adhesive so as to seal only said recesses while leaving said guide perforations open. The cover tape is a nylon based resin sheet, and the adhesive is an ethylene-vinyl acetate copolymer-based adhesive. The cover tape can be pulled smoothly from the carrier tape during automatic assembly of circuit boards.
A tape for encasing electronic parts, comprising a carrier tape having a plurality of recesses for encasing electronic parts and a plurality of guide perforations, said carrier tape having a cover tape pasted thereon with an adhesive in such a way as to seal only the recesses for electronic parts, while leaving the guide perforations open, said cover tape being a nylon-based resin sheet and said adhesive being an ethylene-vinyl acetate copolymer-based adhesive.
Claim 2
Dependent Claim
73 words
A tape for encasing electronic parts, comprising a carrier tape having a plurality of recesses for encasing electronic parts and a plurality of guide perforations, said carrier tape having a cover tape pasted thereon with an adhesive in such a way as to seal only the recesses for electronic parts, while leaving the guide perforations open, said cover tape being a nylon-based resin sheet and said adhesive being an ethylene-vinyl acetate copolymer-based adhesive.
Claim 3
Dependent Claim
74 words
A tape according to claim 1, wherein the peeling adhesivity between the carrier tape and the cover tape is in a range of not more than 70 gf (g/0.6 mm width) and not less than 10 gf (g/0.6 mm width) both at the initial stage and after heat aging at 60°C for 24 hours, and the difference between maximum peeling adhesivity and aluminum peeling adhesivity is not more than 35 gf (g/0.6 mm width).
Claim 4
Dependent Claim
36 words
A tape according to claim 1, wherein said cover tape is made of a member selected from the group consisting of nylon 6, nylon 66, nylon 610, nylon 11, and copolymers of the foregoing nylon polymers.
Claim 5
Dependent Claim
27 words
A tape according to claims 1, wherein said ethylene-vinyl acetate copolymer-based adhesive comprises 70 to 95% by weight ethylene and 5 to 30% by weight vinyl acetate.
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