| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a desmearing method capable of removing smear caused by an inorganic material and an organic material reliably, without using a chemical requiring waste liquid treatment.SOLUTION: A desmearing method of a wiring board material produced by laminating an insulating layer composed of a resin containing filler, and a conductive layer includes a wet ultraviolet light irradiation step for irradiating the treated part in the wiring board material with ultraviolet light under wet state, and a physical vibration step for giving physical vibration to the wiring board material passed through the wet ultraviolet light irradiation step.</p> |
