| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an insulating film having excellent tack-free properties, excellent flexibility durable against repeated folding, fire retardancy, electric insulation reliability, and deformation of which is small during hot press, and warpage is also small, and to provide a printed wiring board with an insulating film. <P>SOLUTION: The insulating film contains at least (A) a binder polymer and (B) organic-inorganic composite particles. The (B) organic-inorganic composite particles are dispersed into the insulating film, and within an arbitrary range of 125 μm×15 μm in the cross section of the insulating film in the thickness direction, the (B) organic-inorganic composite particles occupy the area of 10-60%. <P>COPYRIGHT: (C)2013,JPO&INPIT |
