| 摘要 |
In a wiring laminate portion of a multilayer wiring substrate, a solder resist layer having a plurality of openings is disposed on a main surface side of the laminate structure, and connection terminals are embedded in an outermost resin insulation layer in contact with the solder resist layer. Each of the connection terminals comprises a copper layer and a metallic layer formed of at least one type of metal other than copper. A main-surface-side circumferential portion of the copper layer is covered by the solder resist layer. At least a portion of the metallic layer is located in a recess in a main-surface-side central portion of the copper layer. At least a portion of the metallic layer is exposed via a corresponding opening.
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