In the production process of electronic parts, since a surface resistance value is too much increased after heat foaming of a pressure-sensitive adhesive layer, static electricity is easily accumulated in electronic parts, and the static electricity has interfered with the performance of the electronic parts. This problem has been solved by a pressure-sensitive adhesive tape for temporary fixing of electronic parts of the present invention including at least a supporting substrate film and a thermally expandable pressure-sensitive adhesive layer provided on one side of the substrate, wherein the thermally expandable pressure-sensitive adhesive layer contains thermally expandable microspheres and an ionic liquid; the content of the ionic liquid is 0.01 to 10 parts by weight based on 100 parts by weight of a polymer contained in the thermally expandable pressure-sensitive adhesive layer; the surface resistance of the thermally expandable pressure-sensitive adhesive layer is 1.0 x 1013 Ω/□ or less; and the ratio of the surface resistance after heating for foaming to that before the heating is 5.0 or less.
在电子零件的生产过程中,由于压敏胶层受热发泡后表面电阻值增加过多,电子零件中容易积聚静电,静电干扰了电子零件的性能。本发明的一种用于临时固定电子零件的压敏胶带解决了这一问题,该压敏胶带至少包括支撑基材薄膜和设置在基材一侧的热膨胀压敏胶层,其中热膨胀压敏胶层包含热膨胀微球和
离子液体;
离子液体的含量为 0.01 至 10 份(以 100 份(重量)热膨胀压敏胶层中所含聚合物的重量为基准);热膨胀压敏胶层的表面电阻为 1.0 x 1013 Ω/□ 或更小;加热发泡后的表面电阻与加热前的表面电阻之比为 5.0 或更小。