| 摘要 |
PROBLEM TO BE SOLVED: To prolong the life of a metallic layer because a sorbitan based surfactant having pH value ranging from pH 3 to pH 9 and nitric acid having concentration ranging from 3% to 50% are used for a surface treatment method carried out before an electroplating step for a graphite substrate as a solvent to give good bonding power to the metallic layer deposited on the surface of the graphite substrate after electroplating of the graphite substrate. SOLUTION: The graphite substrate pretreatment method is a surface treatment method which is carried out before the electroplating step for the graphite. The life of the metallic layer is prolonged by using the sorbitan based surfactant having pH value ranging from pH 3 to pH 9 and nitric acid having concentration ranging from 3% to 50% for the surface treatment method carried out before an electroplating step for the graphite substrate as the solvent and the surfactant to prevent the erosion and the destroy of the surface of the graphite substrate and to give the bonding strength to the metallic layer deposited on the surface of the graphite substrate. COPYRIGHT: (C)2011,JPO&INPIT
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