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Middle and high voltage electronic aluminium foil corrosion method

An electronic aluminum foil, medium and high voltage technology

Inactive Publication Date: 2017-05-10
GUANGXI HEZHOU GUIDONG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a medium and high voltage electronic aluminum foil corrosion method, which can effectively solve the problems of uneven current density distribution, uneven corrosion, high capacitance dispersion rate, consistency deviation and other problems existing in the existing corrosion method, and obtain excellent quality corroded foil

Method used

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  • Middle and high voltage electronic aluminium foil corrosion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put the same aluminum foil as in Comparative Example 1 with a purity of 99.99%, a cubic texture occupancy rate greater than 95%, and a thickness of 125 μm in the same phosphoric acid solution as in Comparative Example 1 for pretreatment, take it out and clean it; then place it in two The minimum distance between the middle of the curved rectangular graphite plate with a radius of curvature of 310cm, the aluminum foil and the curved graphite plate is 20cm, and placed in the same mixed solution of hydrochloric acid and sulfuric acid as in Comparative Example 1 for "unequal distance" electrolytic pitting corrosion Take it out and clean it; then place it in the middle of two curved graphite pole plates with a radius of curvature of 310cm, the minimum distance between the aluminum foil and the curved graphite pole plate is 20cm, and place it in the same hydrochloric acid or nitric acid solution as in Comparative Example 1. "Unequal distance" electrolytic hole expansion corros...

Embodiment 2

[0034] Put the same aluminum foil as in Comparative Example 2 with a purity of 99.99%, a cubic texture occupancy rate greater than 95%, and a thickness of 120 μm in the same phosphoric acid solution as in Comparative Example 2 for pretreatment, take it out and clean it; then place it in two The radius of curvature is 100cm in the middle of the curved graphite pole plate, the minimum distance between the aluminum foil and the curved graphite pole plate is 16cm, and the "unequal distance" electrolytic pitting corrosion is carried out in the same hydrochloric acid and sulfuric acid mixed solution as in comparative example 2; Take it out and clean it up; then place it in the middle of two arc-shaped rectangular graphite pole plates with a radius of curvature of 100cm, the minimum distance between the aluminum foil and the arc-surface graphite pole plate is 16cm, and place it in the same hydrochloric acid or nitric acid solution as Comparative Example 2 to carry out " Unequal distan...

Embodiment 3

[0038]Put the same aluminum foil as in Comparative Example 3 with a purity of 99.99%, a cubic texture occupancy rate greater than 95%, and a thickness of 80 μm in the same phosphoric acid solution as in Comparative Example 3 for pretreatment, take it out and clean it; then place it in two The minimum distance between the arc-surfaced rectangular graphite pole plate with a radius of curvature of 55 cm, and between the aluminum foil and the arc-surface graphite pole plate is 10 cm, and placed in the same mixed solution of hydrochloric acid and sulfuric acid as in Comparative Example 3 for "unequal distance" electrolytic porosity corrosion Take it out and clean it; then place it in the middle of two curved graphite pole plates with a radius of curvature of 55cm, the minimum distance between the aluminum foil and the curved graphite pole plate is 10cm, and place it in the same hydrochloric acid or nitric acid solution as in Comparative Example 3. "Unequal distance" electrolytic hol...

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Abstract

The invention discloses a middle and high voltage electronic aluminium foil corrosion method. The middle and high voltage electronic aluminium foil corrosion method comprises the steps of preprocessing high purity aluminum foil, electrolytic-corroding (including creating hole corrosion and expanding hole corrosion), postprocessing, and drying. The electrolytic corrosion method is a ranging distance corrosion method. The electrolytic corrosion method comprises the step that the preprocessed high purity aluminium foil is put between two cambered-surface rectangular graphite pole plates to conduct creating hole corrosion and expanding hole corrosion, wherein the radius of curvature of each graphite pole plate is 45-310 cm, and the minimum distance between the aluminium foil and each pole plate is 10-20 cm. By means of the middle and high voltage electronic aluminium foil corrosion method, the problems of uneven current density distribution, uneven corrosion, high dispersion ratio of capacitance, consistency deviation and the like in the existing corrosion method can be solved, and the aluminium foil with high quality is prepared.

Description

technical field [0001] The invention belongs to the technical field of electronic material manufacturing, and in particular relates to a medium-high voltage electronic aluminum foil corrosion method. Background technique [0002] The medium and high voltage electronic aluminum foil corrosion process is to electrolytically corrode the high-purity aluminum foil with {100} texture, make holes, expand holes, expand its specific surface area, and obtain corrosion foils that meet certain specifications. The corrosion process generally includes pretreatment, porosity corrosion, hole expansion corrosion, post-treatment, drying and other steps; among them, porosity corrosion and hole expansion corrosion are tunnels with uniform distribution of surface corrosion holes and reasonable size (pore diameter, hole length) obtained by aluminum foil. The key to high consistency of holes and capacitance. And the distribution of current density is the main reason that affects the corrosion of ...

Claims

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Application Information

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IPC IPC(8): C25F7/00C25F3/04
CPCC25F7/00C25F3/04
Inventor 杨小飞杨林桑张传超蔡小宇陆宝琳李耀伟
Owner GUANGXI HEZHOU GUIDONG ELECTRONICS TECH