Method of controlling the sintering of metal particles
    43.
    发明授权
    Method of controlling the sintering of metal particles 失效
    控制金属颗粒烧结的方法

    公开(公告)号:US4776978A

    公开(公告)日:1988-10-11

    申请号:US42922

    申请日:1987-04-27

    摘要: Sintering of metal particles at their normal sintering temperature is inhibited by coating the metal particles with an organic material such as polyvinyl butyral, polyvinyl formvar, polyvinyl alcohol, polyacrylonitrile epoxies, urethanes and cross-linked polyvinyl butyral. The organic coating serves as a barrier preventing physical contact between metal particles during the initial phase of the sintering cycle and degrades into a carbonaceous coating followed by volatilization during the intermediate phase of the cycle permitting coalescence of the metal particles into a dense mass along with the coalescence of the glass-ceramic particles. Co-sintering of the metal particles and the glass-ceramic particles with the aid of the organic coating results in a hermetic multi-layer glass ceramic substrate free of dimensional stability problems without deleteriously affecting the electrical conductivity of the metal conductor pattern.

    摘要翻译: 通过用有机材料如聚乙烯醇缩丁醛,聚乙烯基甲醛,聚乙烯醇,聚丙烯腈环氧化合物,聚氨酯和交联的聚乙烯醇缩丁醛涂覆金属颗粒来抑制金属颗粒在其正常烧结温度下的烧结。 有机涂层用作防止金属颗粒在烧结循环的初始阶段期间物理接触的屏障,并降解成碳质涂层,随后在循环的中间阶段挥发,使得金属颗粒与 玻璃陶瓷颗粒的聚结。 借助于有机涂层来共同烧结金属颗粒和玻璃 - 陶瓷颗粒导致密封的多层玻璃陶瓷衬底没有尺寸稳定性问题,而不会有害地影响金属导体图案的导电性。