| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cover lay film with a white resin layer, which has at least one kind or more of advantages, such as no process contamination, high flexibility, high whiteness, high reflectance, excellent flame retardancy, no bleeding-out during hot pressing, and reduced reflectance-hue change after irradiation with light, and to provide a printed wiring board. <P>SOLUTION: There is provided a white cover lay film comprising at least a white thermosetting resin composition layer and a polyimide film, the white thermosetting resin composition layer containing (A) a thermosetting resin substantially containing no silicon in a molecule, (B) a white coloring agent and (C) a filler-type flame retardant. <P>COPYRIGHT: (C)2012,JPO&INPIT |
