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公开(公告)号：US4332652A
公开(公告)日：1982-06-01
申请号：US280659
申请日：1981-07-06
摘要： Aluminum electrolytic capacitor foil is etched in a bath containing 0.5 to 1.8 M hydrochloric acid, 0.2 to 0.5 M aluminum chloride, 0.03 to 0.3 M phosphoric acid, and 0.05 to 0.3 M nitric acid, the molar ratio of said nitric acid to said phosphoric acid being 0.3-5, while subjected to the action of alternating current at 28.degree. to 45.degree. C.
摘要翻译： 在包含0.5至1.8M盐酸，0.2至0.5M氯化铝，0.03至0.3M磷酸和0.05至0.3M硝酸的浴中蚀刻铝电解电容器箔，所述硝酸与所述磷酸的摩尔比 为0.3-5，同时在28℃至45℃下进行交流电动作。
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公开(公告)号：US4582574A
公开(公告)日：1986-04-15
申请号：US765742
申请日：1985-08-15
CPC分类号： H01G9/0032 , C25D11/12
摘要： Aluminum capacitor foil which has been etched for low-voltage applications is rendered usable in intermediate to high voltage capacitors by anodizing the foil in two-stages; first a low voltage stage in an adipate electrolyte and then a higher voltage stage in a borate electrolyte. The fine etch structure of the low-voltage etch is thereby not plugged in the second, higher voltage formation stage, whereby the foil is suitable for intermediate to high-voltage capacitor use.
摘要翻译： 用于低电压应用的蚀刻用铝电容器箔通过以两级阳极氧化来形成中高电压电容器; 首先是己二酸电解质中的低电压阶段，然后是硼酸盐电解质中较高的电压阶段。 因此，低电压蚀刻的精细蚀刻结构未被插入第二较高电压形成阶段，由此该箔适用于中间到高压电容器的使用。
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公开(公告)号：US4427506A
公开(公告)日：1984-01-24
申请号：US422931
申请日：1982-09-24
摘要： In the AC etching of aluminum foil in a hydrochloric acid electrolyte containing at least one additive, the presence of 200 to 500 ppm sulfate permits etching thicker foil for higher voltage use than is possible without the sulfate. The additive is chosen from phosphoric, nitric, and tartaric acids or salts. The presence of the relatively small amount of sulfate yields a foil with higher capacitance and generally allows lower temperatures and frequencies to be used.
摘要翻译： 在含有至少一种添加剂的盐酸电解质中的铝箔的AC蚀刻中，存在200-500ppm的硫酸盐允许在没有硫酸盐的情况下蚀刻较厚的箔以达到更高的电压使用。 添加剂选自磷酸，硝酸和酒石酸或盐。 相对少量的硫酸盐的存在产生具有较高电容的箔，并且通常允许使用较低的温度和频率。
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