| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring board which can electrically connect connection pads stably to an external electric circuit over a long period of time, where its insulating substrate is a rectangle and the plurality of connection pads are formed along both the longer sides of the main surface. SOLUTION: The wiring substrate 9 includes the rectangular insulating substrate 1, composed of ceramics in which a wiring conductor 2 is formed, the plurality of connection pads 3 which are electrically connected with the wiring conductor 2 and are formed along both the longer sides of the main surface of the insulating substrate 1; and a metallized layer 4 which is formed in the center portion of the main surface of the insulating substrate 1 parallel to the longer side direction. COPYRIGHT: (C)2005,JPO&NCIPI
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