| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet-like film having a difference of characteristic values between the front and back sides while keeping in the film a specific gradient dispersion of the functional particles in the direction of the film thickness, and a method for manufacturing the same. SOLUTION: The film is one that has ends in four directions, and is characterized in that the functional particles are gradient-dispersed in the direction of the film thickness. Wherein the functional particles are characterized by comprising either of an electrically conductive particle, a thermally conductive particle and a lubricating particle or the combination thereof in part or in all. It is preferred that the film comprises a polyimide-based resin as the main component and uses as a raw material a resin whose precursor solution is a polyamic acid. COPYRIGHT: (C)2005,JPO&NCIPI |
