| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small size element mounting board exhibiting high reliability by employing a resin film containing cardo type polymer. <P>SOLUTION: When a resin film containing cardo type polymer satisfies a plurality of characteristics, various characteristics being required for a substrate 302 containing cardo type polymer and an insulating resin film 312, e.g. thin film, mechanical strength, heat resistance, adhesion to other member, resolution, dielectric characteristics, moisture resistance, and the like, are realized with good balance. Consequently, a small size element mounting board exhibiting high reliability is provided stably. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
