| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an element mounting board exhibiting excellent reliability and heat resistance stably. <P>SOLUTION: The manufacturing method of a board for mounting an element comprises a step for forming a multilayer film consisting of an insulating resin layer 312 and a photosolder resist film 328 containing cardo type polymer, respectively, on the opposite surfaces of a substrate 302. The step for forming each multilayer film comprises a step for forming a photosolder resist film 328 by bonding a material film containing cardo type polymer. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
