| 摘要 |
PURPOSE: To provide a method of manufacturing a wiring board which is higher than a conventional one in reliability. CONSTITUTION: A conductive material 14 which electrically connects wiring layers 11 together is made columnar, whereby the columnar conductive material 14 becomes lower than a conventional hollow conductive material in resistance and inductance, so that heat released from the conductive material 14 can be reduced, and a wiring board of this constitution can be more improved in reliability than a conventional wiring board. |
