| 摘要 |
PURPOSE: An electric circuit board is provided to form electrode pads smaller than openings of an insulating film in a plane surface direction for improving the flatness of the insulating film. CONSTITUTION: An electric circuit board includes an insulating substrate(11), and an insulating film(23) formed on the substrate. Wires are formed on the substrate and connected to electrode pads(21) formed of conductive materials connected to external connection terminals. The insulating film is formed with openings for exposing the electrode pads upward. The electrode pads are smaller than the openings at corresponding positions not to overlap the insulating film by the electrode pads, so that a clearance(26) is formed between each of the electrode pads and each of the openings.
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