Methods for using polishing pads
    5.
    发明授权
    Methods for using polishing pads 失效
    使用抛光垫的方法

    公开(公告)号:US6017265A

    公开(公告)日:2000-01-25

    申请号:US782717

    申请日:1997-01-13

    摘要: Polymer-based pads useful for polishing objects, particularly integrated circuits, having interconnected porosity which is uniform in all directions, and where the solid portion of said pad consists of a uniform continuously interconnected polymer material of greater than 50% of the gross volume of the article, are produced directly to final shape and dimension by pressure sintering powder compacts of thermoplastic polymer at a temperature above the glass transition temperature but not exceeding the melting point of the polymer and at a pressure in excess of 100 psi in a mold having the desired final pad dimensions. In a preferred version, a mixture of two polymer powders is used, where one polymer has a lower melting point than the other. When pressure sintered at a temperature not to exceed the melting point of the lower melting powder, the increased stiffness afforded by incorporation of the higher melting polymer component gives improved mechanical strength to the sintered product. Conditions for producing the pads of this invention are such that the polymer powder particles from which the pads are produced essentially retain their original shape and are point bonded to form the pad.

    摘要翻译: 用于抛光物体,特别是集成电路的聚合物基垫,具有在所有方向上均匀的相互连接的孔隙度,并且其中所述垫的固体部分由大于总体积的50%的均匀的连续相互连接的聚合物材料组成 制品通过在高于玻璃化转变温度但不超过聚合物的熔点并且在具有所需的模具的模具中的压力超过100psi的压力下加压烧结热塑性聚合物的粉末压块直接制成最终形状和尺寸 最终垫尺寸。 在优选的方案中,使用两种聚合物粉末的混合物,其中一种聚合物的熔点比另一种低。 当在不超过下熔融粉末的熔点的温度下进行压力烧结时,通过引入较高熔点的聚合物组分提供的增加的刚性使烧结产品具有改善的机械强度。 制造本发明的焊盘的条件使得制造焊盘的聚合物粉末颗粒基本上保持其原始形状并且被点焊以形成焊盘。