C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 7/02 (2006.01) C09J 9/02 (2006.01) C09J 131/02 (2006.01) C09J 133/04 (2006.01) H01B 1/12 (2006.01)
Patent
CA 2205848
There is provided a water-resistant, anti-static pressure-sensitive adhesive tape comprising a flexible substrate having opposing surfaces, at least one surface bearing thereon a removable, aziridine-crosslinked microparticulate adhesive comprised of microparticles comprising a polymer of monomers comprising at least one alkyl. (meth)acrylate or vinyl ester, said aziridine cross linking agent being present in an amount of from about 0.1 part to 2 parts per 100 part monomer, said microparticles having a surface bearing thereon an ionic conductive material formed from a polymer electrolyte base polymer selected from the group consisting of polyethylene oxide, polyphenylene oxide, polyphenylene sulfide, polyethylene sulfide, polyethyleneimine, polypropylene oxide, polybutylene oxide, polybutylene sulfide, and polybutylene imine, and at least one ionic salt selected from the group consisting of salts of alkali metals and salts of alkaline earth metals, wherein said microparticles have an average diameter of at least 1 micrometer, and a pH from 2.5 to 7Ø The tape is suitable for use as a wafer dicing tape.
L'invention concerne un ruban auto-adhésif, antistatique et résistant à l'eau pouvant être utilisé comme ruban de découpe pour plaquette à gravure. Ce ruban comprend un substrat souple présentant des surfaces opposées. Au moins une de ces surfaces supporte un adhésif microparticulaire réticulé à l'aziridine, constitué de microparticules dont une surface supporte un matériau conducteur ionique formé à partir d'un polymère de base d'un électrolyte polymère et au moins un sel ionique sélectionné dans le groupe se composant de sels de métaux alcalins et de sels de métaux alcalino-terreux. Ces microparticules présentent un diamètre moyen de 1 micromètre, et l'adhésif présente une adhérence à l'acier comprise entre 0,5 Newtons/100 mm (N/100 mm) et 10 N/100 mm.
Gutman Gustav
Yau Steven D.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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