Patent ID: 6027802
Filing Date: 2000-02-22
Classification: B32B,B65D,C09J,H05K,Y10S,Y10T

Abstract:
A cover tape for encasing electronic parts or components in a carrier tape or carrier tray, said cover tape comprising:an adhesive layer having an upper surface and a lower surface;a randomly embossed layer adhered to said upper surface of said adhesive layer wherein said upper surface of said adhesive layer is covered by said randomly embossed layer; said randomly embossed layer having a plurality of randomly arranged holes therethrough;a non-adhesive layer having two edges running along either side thereof, said non-adhesive layer being adhered to said lower surface of the adhesive layer and said non-adhesive layer being narrower than said adhesive layer and being positioned on said adhesive layer beneath said randomly embossed layer so that only a central portion of said randomly embossed layer with said adhesive layer thereon is covered with said non-adhesive layer, thereby defining a pair of exposed adhesion portions comprised of said randomly embossed layer with said adhesive layer thereon; said adhesion portions being located along the edges of said non-adhesive layer for adhering said cover tape to a carrier tape or carrier tray wherein said edges of said non-adhesive layer define a pair of stress concentration zones which extends through said randomly embossed layer along the edges of said non-adhesive layer;said stress concentration zones defining a torn strip portion comprised of said non-adhesive layer and all the layers adhered to said non-adhesive layer between said pair of stress concentration zones;said torn strip portion being peelable from said adhesion portions along said pair of stress concentration zones to permit removal of encased electronic parts from the carrier tape or carrier tray when said exposed adhesion portions are adhered to said carrier tape or carrier tray.