Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Reexamination Certificate
2006-02-14
2006-02-14
Zirker, Daniel (Department: 1771)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
C428S040100, C428S343000, C428S346000, C428S3550RA, C428S3550AC, C428S3550EN, C428S356000, C428S922000
Reexamination Certificate
active
06998175
ABSTRACT:
A heat-peelable pressure-sensitive adhesive sheet which, even when used for temporarily fixing electronic parts having poor resistance to static electricity, such as magnetic heads, is effective in preventing the yield of such electronic parts from being reduced by electrostatic breakage, while ensuring its functions of adhesiveness before heating and peelability after heating. The heat-peelable pressure-sensitive adhesive sheet comprises a substrate and formed on at least one side thereof a heat-expandable pressure-sensitive adhesive layer containing heat-expandable microspheres, wherein the heat-expandable pressure-sensitive adhesive layer has a surface resistivity of 1012Ω/□ or lower. In this heat-peelable pressure-sensitive adhesive sheet, the heat-expandable pressure-sensitive adhesive layer before heating may have a center line average surface roughness of 2 μm or less and a maximum surface roughness of 5 μm or less. The adhesive sheet may have a rubber-like organic elastic layer interposed between the substrate and the heat-expandable pressure-sensitive adhesive layer.
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Arimitsu Yukio
Kiuchi Kazuyuki
Murata Akihisa
Oshima Toshiyuki
Nitto Denko Corporation
Sughrue & Mion, PLLC
Zirker Daniel
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