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    • 2. 发明授权
    • Laser marking of raw aluminum anode foil to induce uniform patterning etching
    • 激光标记原铝阳极箔以诱导均匀图案蚀刻
    • US07452473B1
    • 2008-11-18
    • US10940793
    • 2004-09-13
    • R. Jason HemphillXiaofei JiangTearl StockerGary D. ThompsonThomas F. StrangeBruce Ribble
    • R. Jason HemphillXiaofei JiangTearl StockerGary D. ThompsonThomas F. StrangeBruce Ribble
    • H01G4/00C23F1/00C23F3/00
    • C23F4/00C23F1/02C25F3/02C25F3/04H01G9/045H01G9/055
    • A method of producing a highly etched electrode for a capacitor from a foil is disclosed. The method comprises first applying a laser beam to the foil to form a plurality of marks on the foil surface and then etching the foil. Preferably, the laser marks facilitate etching of foil surface in areas near the marks and retard etching of foil surface inside the marks. After etching, the foil is further processed in a combination of optional steps such as forming and finishing steps. The laser marking of the foil allows for positional control of tunnel initiation, such that tunnel initiation density and the location of tunnel initiation is controlled. By controlling the position of tunnel initiation, foils are etched more uniformly and have optimum tunnel distributions, thus allows for the production of highly etched foils that maintain high strength and have high capacitance. The present invention further includes an electrolytic capacitor comprising etched aluminum anode foils, which have been prepared using the methods of the present invention.
    • 公开了一种从箔制造用于电容器的高蚀刻电极的方法。 该方法包括首先将激光束施加到箔上以在箔表面上形成多个标记,然后蚀刻箔。 优选地,激光标记便于在标记附近的区域中蚀刻箔表面并延迟对标记内的箔表面的蚀刻。 在蚀刻之后,箔可以以可选步骤的组合进一步加工,例如成型和精加工步骤。 箔的激光标记允许隧道起始的位置控制,使得隧道起始密度和隧道起始的位置被控制。 通过控制隧道起始的位置,箔被更均匀地蚀刻并且具有最佳的隧道分布,从而允许生产保持高强度并具有高电容的高度蚀刻的箔。 本发明还包括使用本发明的方法制备的包含蚀刻的铝阳极箔的电解电容器。
    • 3. 发明授权
    • Creation of porous anode foil by means of an electrochemical drilling process
    • 通过电化学钻孔工艺制造多孔阳极箔
    • US06802954B1
    • 2004-10-12
    • US10199846
    • 2002-07-18
    • Ralph Jason HemphillThomas V. GrahamThomas F. Strange
    • Ralph Jason HemphillThomas V. GrahamThomas F. Strange
    • B23H1100
    • G06Q10/10C25F3/02C25F3/04C25F3/14H01G9/055
    • The present invention is directed to a method of creating porous anode foil for use in multiple anode stack configuration electrolytic capacitors, producing a pore structure that is microscopic in pore diameter and spacing, allowing for increased energy density with a minimal increase in ESR. Initially, an anode metal foil is etched, according to a conventional etch process, to produce an enlargement of surface area. The etched foil is then placed into the electrochemical drilling solution of the present invention. Alternatively, the etched foil may be masked, so that only small areas of the etched foil are exposed, prior to being placed in the electrochemical drilling solution. A DC power supply is used to electrochemically etch the masked or unmasked foil in the electrochemical drilling solution of the present invention such that pores on the order of a few microns diameter are produced through the foil. The electrochemical drilling solution of the present invention consists of 1 to 15% by weight sodium chloride, preferably 5% by weight, and 10 to 5000 PPM of a surface passivator, such as sodium nitrate or phosphoric acid, preferably 500 PPM. Finally, the foil pores are widened and the foil is formed to the intended use voltage according to conventional widening and forming processes. When used in conjunction with an electrochemical etch preceding it and an electrochemical widening step following it, the electrochemical drilling step of the present invention results in an electrically porous foil which maintains the high capacitance gain produced by the etching and widening steps alone, but, when used in a multiple anode stack configuration, exhibits a reduced equivalent series resistance.
    • 本发明涉及一种用于多阳极堆叠配置电解电容器的多孔阳极箔的制造方法,其产生孔径和间距微观的孔结构,从而允许以ESR最小增加的能量密度增加。 首先,根据常规的蚀刻工艺蚀刻阳极金属箔,以产生表面积的增大。 然后将蚀刻的箔放入本发明的电化学钻井溶液中。 或者,蚀刻的箔可以被掩蔽,使得在被放置在电化学钻井溶液中之前,只有小的蚀刻箔的面积被暴露。 直流电源用于电化学蚀刻本发明的电化学钻井溶液中的掩蔽或未掩模的箔,使得通过箔产生约几微米直径的孔。 本发明的电化学钻井溶液由1至15重量%的氯化钠,优选5重量%和10至5000PPM的表面钝化剂,例如硝酸钠或磷酸,优选500PPM组成。 最后,根据传统的加宽和成形方法,箔片孔被加宽并且箔形成为预期的使用电压。 当与其前面的电化学蚀刻和其后的电化学扩展步骤结合使用时,本发明的电化学钻孔步骤产生电极多孔箔,其保持仅由蚀刻和扩大步骤产生的高电容增益,但是当 用于多重阳极堆叠配置中,具有降低的等效串联电阻。
    • 9. 发明授权
    • Method of producing high quality oxide for electrolytic capacitors
    • 电解电容器生产高品质氧化物的方法
    • US06197184B1
    • 2001-03-06
    • US09183442
    • 1998-10-29
    • Ralph Jason HemphillThomas Flavian Strange
    • Ralph Jason HemphillThomas Flavian Strange
    • C25D900
    • H01G9/0032C25D11/02
    • An oxide dissolving acid dip is integrated into an anodic foil formation process. After a foil, either etched or un-etched, is hydrated in a bath of deionized water at an elevated temperature, the foil is then dipped in an organic acid mixture. Next, an oxide layer formation step is utilized to form a barrier oxide layer on a surface of the foil. Next, an oxide dissolving acid dip is utilized to selectively remove a diffuse hydrate layer formed in the formation process. The diffuse hydrate layer is responsible for the reduction of capacitance of the anodic foil. By the use of this oxide dissolving acid dip in conjunction with an organic acid dip, the foil exhibits reduced leakage current properties, while maintaining its capacitance. The treated foil can then be incorporated into a high voltage electrolytic capacitor suitable for use in an implantable cardioverter defibrillator.
    • 将氧化物溶解酸浸液整合到阳极箔形成工艺中。 在蚀刻或未蚀刻的箔之后,在升高的温度下在去离子水浴中水合,然后将箔浸入有机酸混合物中。 接下来,利用氧化物层形成步骤在箔的表面上形成阻挡氧化物层。 接下来,使用溶解酸浸的氧化物来选择性地去除在形成过程中形成的扩散水合物层。 扩散水合物层负责减少阳极箔的电容。 通过使用这种氧化物溶解酸浸渍与有机酸浸渍结合,箔保持其电容,显示出降低的漏电流特性。 然后将经处理的箔并入适用于可植入心律转复除颤器的高压电解电容器中。