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    • 69. 发明授权
    • Fabrication method of solid electrolytic capacitor using organic
conducting polymer
    • 使用有机导电聚合物的固体电解电容器的制造方法
    • US6110235A
    • 2000-08-29
    • US144253
    • 1998-08-31
    • Kenji ArakiSatoshi AraiYuuji AokiKenichi TakahashiTakashi Fukaumi
    • Kenji ArakiSatoshi AraiYuuji AokiKenichi TakahashiTakashi Fukaumi
    • H01G9/028H01G9/00H01G9/02H01G9/025H01G9/04H01G9/15B21F41/00
    • H01G9/025H01G11/48H01G11/56H01G9/15Y02E60/13Y10T29/417
    • A fabrication method of a solid electrolytic capacitor is provided, which decreases the leakage current of a solid electrolytic capacitor without deterioration of ESR. This method is comprised of the steps (a) to (e). In the step (a), a capacitor body is formed by a valve metal, the body serving as an anode of the capacitor. In the step (b), an oxide layer of the valve metal is formed to cover a surface of the capacitor body by anodic oxidation, the oxide layer serving as a dielectric of the capacitor. In the step (c), a layer of an organic conducting polymer is formed on the oxide layer, the layer of the organic conducting polymer serving as a solid electrolyte of the capacitor. In the step (d), the capacitor body with the oxide layer and the layer of the organic conducting polymer is immersed in a reoxidation solution, the reoxidation solution containing a mixture of water and alcohol or a mixture of water and ketone as a solvent. In the step (e), a voltage is applied to the capacitor body to reoxidize the oxide layer in the reoxidation solution by anodic oxidation, thereby healing defects of the oxide layer. The amount of alcohol or ketone is preferably 30 vol % to 50 vol %.
    • 提供了一种固体电解电容器的制造方法,其降低了固体电解电容器的漏电流而不会降低ESR。 该方法由步骤(a)至(e)组成。 在步骤(a)中,电容器主体由阀体金属形成,该主体用作电容器的阳极。 在步骤(b)中,通过阳极氧化形成阀金属的氧化物层以覆盖电容器主体的表面,氧化物层用作电容器的电介质。 在步骤(c)中,在氧化物层上形成有机导电聚合物层,有机导电聚合物层用作电容器的固体电解质。 在步骤(d)中,将具有氧化物层的电容器主体和有机导电聚合物层浸渍在再氧化溶液中,再次含有水和醇的混合物或水与酮的混合物作为溶剂的再氧化溶液。 在步骤(e)中,向电容器主体施加电压,通过阳极氧化再氧化再氧化溶液中的氧化物层,从而修复氧化物层的缺陷。 醇或酮的量优选为30体积%〜50体积%。