Heat-Sealing Cover Film For Packaging Electronic Components
First Claim
1. A cover film for heat-sealing to a carrier tape which has pockets for carrying electronic components, the cover film comprising:
- a polyester base layer;
a first antistatic layer disposed on a first surface of the base layer;
an intermediate bi-layer structure comprising a first intermediate layer and a second intermediate layer, wherein the first intermediate layer is disposed on a second surface of the base layer opposite the first antistatic layer and comprises polyethylene and wherein the second intermediate layer is disposed on the first intermediate layer opposite the base layer and comprises a poly(vinyl acetate) copolymer and a poly(styrene-butadiene) copolymer;
a second antistatic layer disposed on the second intermediate layer opposite the first intermediate layer and comprising carbon nanotubes in a polyacrylate binder; and
a heat-sealing layer disposed on the second antistatic layer opposite the second intermediate layer.
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Accused Products
Abstract
A cover film for heat-sealing to a carrier tape for carrying electronic components is described herein. The cover film comprises a polyester base layer, a first antistatic layer disposed on a first surface of the base layer, an intermediate bi-layer structure comprising a first intermediate layer and a second intermediate layer, the first intermediate layer disposed on a second surface of the base layer opposite the first antistatic layer, the second intermediate layer disposed on the first intermediate layer opposite the base layer, a second antistatic layer disposed on the second intermediate layer opposite the first intermediate layer, and a heat-sealing layer disposed on the second antistatic layer. In an exemplary aspect, the first intermediate layer comprises polyethylene and the second intermediate layer comprises a poly(vinyl acetate) copolymer and a polystyrene-butadiene) copolymer. In another exemplary aspect, the second antistatic layer comprises carbon nanotubes in a polyacrylate binder.
25 Citations
26 Claims
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1. A cover film for heat-sealing to a carrier tape which has pockets for carrying electronic components, the cover film comprising:
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a polyester base layer; a first antistatic layer disposed on a first surface of the base layer; an intermediate bi-layer structure comprising a first intermediate layer and a second intermediate layer, wherein the first intermediate layer is disposed on a second surface of the base layer opposite the first antistatic layer and comprises polyethylene and wherein the second intermediate layer is disposed on the first intermediate layer opposite the base layer and comprises a poly(vinyl acetate) copolymer and a poly(styrene-butadiene) copolymer; a second antistatic layer disposed on the second intermediate layer opposite the first intermediate layer and comprising carbon nanotubes in a polyacrylate binder; and a heat-sealing layer disposed on the second antistatic layer opposite the second intermediate layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification