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    • 10. 发明授权
    • Polyimide composition for LOC adhesive tapes
    • LOC胶带的聚酰亚胺组合物
    • US6117951A
    • 2000-09-12
    • US253836
    • 1999-02-19
    • Shur-Fen LiuJinn-Shing KingJing-Pin Pan
    • Shur-Fen LiuJinn-Shing KingJing-Pin Pan
    • C09J179/08C08L79/08
    • C09J179/08
    • An adhesive tape for lead-on-chip (LOC) IC applications containing a polyamide-based adhesive composition which is the reaction product from a reaction mixture of: (a) a pre-imidized polyamic acid; and (b) a bismaleimide that has been modified by a barbituric acid of a derivative of barbituric acid to become a barbituric acid modified bismaleimide. The pre-imidized polyamic acid is a reaction product from a reaction mixture that contains a polyamic acid and a cyclizing agent. The polyamide-based adhesive composition provides all the desirable heat resistance and other mechanical and dielectric characteristics. But, most significantly, its microscopic rheological properties are adjusted such that excellent contact is achieved between the resin molecules and the lead frame surface while eliminating or at least minimizing the extent of adhesive overflow, which can substantially reduce the reliability of the final IC product.
    • 一种用于片上(LOC)IC应用的胶带,其包含聚酰胺基粘合剂组合物,其为来自以下反应混合物的反应产物:(a)预酰亚胺化的聚酰胺酸; 和(b)已经被巴比妥酸衍生物的巴比妥酸改性成为巴比妥酸改性双马来酰亚胺的双马来酰亚胺。 预酰亚胺化聚酰胺酸是含有聚酰胺酸和环化剂的反应混合物的反应产物。 聚酰胺基粘合剂组合物提供所有期望的耐热性和其它机械和介电特性。 但是,最显着的是,其微观流变特性被调节,使得在树脂分子和引线框架表面之间获得良好的接触,同时消除或至少最小化粘合剂溢出的程度,这可以显着降低最终IC产品的可靠性。