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EP0354709A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A tape for encasing electronic parts

Assignee: 3M Co
•
Filing: 1989-08-01
•
Granted: —
•
Expires: 2009-08-01
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Abstract

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.

Inventors

  • 👤 Shunsuke C/O Minnesota Mining And Yamashita
  • 👤 Norihito C/O Minnesota Mining And Kondoh

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 01:30
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/003; C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10S428/906; Y10T; Y10T428/00; Y10T428/14; Y10T428/1438; Y10T428/1443; Y10T428/23; Y10T428/239; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/2486; Y10T428/28; Y10T428/2804; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2835; Y10T428/2839; Y10T428/2848; Y10T428/2852; Y10T428/2878; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31855; Y10T428/31935

Claims Analysis

Total Claims: 5
Claim 1
Independent 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 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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