| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring substrate capable of being divided into a multitude of pieces, in which printing failure or the like on an insulating coat layer can be easily and correctly confirmed by naked eyes. SOLUTION: The wiring substrate is constituted of a plurality of laminated insulating layers. The substrate is provided with a rectangular ceramic mother substrate 1 in which a plurality of wiring substrate regions 4 are arrayed and formed longitudinally and laterally at the central part, and a dummy region 6 is formed at the outer peripheral part of the same; wiring conductors 3 formed in the wiring substrate region of the insulating layer; predetermined letter patterns 5 consisting of conductors formed in the dummy region; first insulating coat layers 7 formed so as to cover a part of the surfaces of wiring conductors 3; and a second insulating coat layer 8 formed so as to cover the letter patterns. COPYRIGHT: (C)2005,JPO&NCIPI
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