摘要： 研究了不同银粉含量、银粉形貌、银粉粒径对导电银浆电性能的影响，对比不同树脂粘结相对导电银浆电性能及对银粉润湿性的影响，探讨不同固化条件对导电银浆电阻率的影响。以自制聚氨酯为树脂粘结相，探讨了导电银浆的耐弯折性能。结果表明，以片状银粉和球状银粉混合使用作为导电相的导电效果好于两者单独使用时的导电效果。实验证明了聚氨酯为树脂粘结相的导电银浆对银粉的润湿性较好，且耐弯折性能较佳。

关键词: 薄膜开关, 低温固化, 导电银浆, 聚氨酯

Abstract: The effect of the content, shape and diameter of silver powder on the conductive silver paste performance was studied and the effect of curing schedure and resin matrix on electrical resistance and wetting of the paste were studied respectively. The bending strength of silver paste using polyurethane as binder was studied. Results showed that the electrical conductivity of silver paste which used mixture of flak silver and spherical silver was better than that of single flaky silver or spherical silver. It also showed that the bending property of silver paste and the surface welttability of silver powder was improved dramatically if polyurethane was used as the binder.

Key words: membrane switch, low temperature curing, conductive silver paste, polyurethane