Patent ID: 7163597
Filing Date: 2007-01-16
Classification: C09J,H01L,Y10T

Abstract:
1. A method of temporarily fixing an electronic part in the step of cut processing, comprising applying a heat-peelable pressure-sensitive adhesive sheet to the electronic part, performing said cut processing, and removing said heat-peelable pressure-sensitive adhesive sheet from the part, wherein said heat-peelable pressure-sensitive adhesive sheet comprises a substrate and a heat-expandable pressure-sensitive adhesive layer containing heat-expandable microspheres, formed on at least one side of the substrate, wherein a surface of said heat-expandable pressure-sensitive adhesive layer before heating has a center line average roughness of 0.4, μm or less, and the particle diameter of the heat-expandable microspheres satisfies the relationship: thickness of the heat-expandable pressure-sensitive adhesive layer particle diameter of the heat-expandable microspheres.