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    • 9. 发明授权
    • Method of fabricating a bismaleimide (BMI) ASA sacrifical material for an integrated circuit air gap dielectric
    • 制造用于集成电路气隙电介质的双马来酰亚胺(BMI)ASA牺牲材料的方法
    • US06872654B2
    • 2005-03-29
    • US10330619
    • 2002-12-26
    • Tian-An ChenKevin P. O'Brien
    • Tian-An ChenKevin P. O'Brien
    • H01L21/312H01L21/768H01L21/4763
    • H01L21/7682H01L21/02118H01L21/02203H01L21/02282H01L21/02348H01L21/312
    • A method for implementing a bismaleimide (BMI) polymer as a sacrificial material for an integrated circuit air gap dielectric. The method of one embodiment comprises forming a first and second metal interconnect lines on a substrate, wherein at least a portion of the first and second metal interconnect lines extend parallel to one another and wherein a trough is located between the parallel portion of said first and second metal interconnect lines. A layer of bismaleimide is spin coated over the substrate. The layer of bismaleimide is polished with a chemical mechanical polish, wherein the trough remains filled with the bismaleimide. A diffusion layer is formed over the substrate. The substrate is heated to activate a pyrolysis of the bismaleimide. An air gap is formed in the trough in the space vacated by the bismaleimide.
    • 一种用于实现用于集成电路气隙电介质的双马来酰亚胺(BMI)聚合物作为牺牲材料的方法。 一个实施例的方法包括在衬底上形成第一和第二金属互连线,其中第一和第二金属互连线的至少一部分彼此平行延伸,并且其中槽位于所述第一和第二金属互连线的平行部分之间, 第二金属互连线。 将一层双马来酰亚胺旋涂在基材上。 用化学机械抛光剂抛光双马来酰亚胺层,其中槽保持充满双马来酰亚胺。 在衬底上形成扩散层。 加热底物以活化双马来酰亚胺的热解。 在由双马来酰亚胺空出的空间中的槽中形成气隙。