CONDUCTIVE PASTE STRUCTURE AND MANUFACTURE THEREOF

    公开(公告)号:JPH1145618A

    公开(公告)日:1999-02-16

    申请号:JP16024698

    申请日:1998-06-09

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To provide a conductive paste material that is environmentally safe and inexpensive, and that provides higher conductivity than an existing silver fill-up epoxy. SOLUTION: This conductive paste structure comprises a polymer material, a conductive film 32, e.g. a particle having tin or a mixture with copper. Films of adjacent particles are heated each other to be fused. A polymer material is styrene allylalcohol resin or thermoplastic phenoxy polymer. This structure is provided between two conductive surfaces, e.g. between a chip pad and a substrate pad, to give a mutual electric connection and mechanical adhesion.

    COMPOSITION FOR PHOTO IMAGING
    10.
    发明专利

    公开(公告)号:CA1334566C

    公开(公告)日:1995-02-28

    申请号:CA611439

    申请日:1989-09-14

    Applicant: IBM

    Abstract: An improved photoimagable cationically polymerizable epoxy based coating material is provided. The material includes an epoxy resin system consisting essentially of between about 10% and about 80% by weight of a polyol resin which is a condensation product of epichlorohydrin and bisphenol A having a molecular weight of between about 40,000 and 130,000; between about 20% and about 90% by weight of an epoxidized octafunctional bisphenol A formaldehyde novolak resin having a molecular weight of 4,000 to 10,000; and if flame retardancy is required between about 35% and 50% by weight of an epoxidized glycidyl ether of tetrabromo bisphenol A having a softening point of between about 60.degree.C and about 110.degree.C and a molecular weight of between about 600 and 2,500. To this resin system is added about 0.1 to about 15 parts by weight per 100 parts of resin of a cationic photoinitiator capable of initiating polymerization of said epoxidized resin system upon exposure to actinic radiation; the system being further characterized by having an absorbance of light in the 330 to 700 nm region of less than 0.1 for a 2.0 mil thick film. Optionally a photosensitizer such as perylene and its derivatives or anthracene and its derivatives may be added.

Patent Agency Ranking