MULTILAYER FLEXIBLE PRINTED WIRING BOARD AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To provide a multilayer flexible printed wiring board having interlayer connection which is excellent in connection reliability, the best for microfabrication of a wiring layer and superior in productivity; and to provide its production. SOLUTION: The multilayer flexible printed wiring board is so constituted that conductor filled in a hole formed in thickness direction of an insulating layer which connects electrically a part between wiring layers formed on both sides of the insulating layer. The wiring board consists of configuration containing copper core solder balls having copper balls being included in a core inside the conductor. COPYRIGHT: (C)2005,JPO&NCIPI