| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring substrate which is excellent in migration resistance. SOLUTION: This wiring substrate 10 is configured of: a plane-shaped insulating substrate 11; a first circuit 12 and a second circuit 13 arranged on one face 11a; an insulating material 15 arranged so that at least the first circuit 12 can be covered; and a junction 14 in which an end section 13a of the second circuit 13 is overlaid on an end section 12a of the first circuit 12. The migration resistance of the second circuit 13 containing conductive particles is made more excellent than that of the first circuit 12. COPYRIGHT: (C)2008,JPO&INPIT
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