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A kind of manufacturing process of conductive ball

A production process and technology of conductive balls, applied in the direction of manufacturing tools, metal processing equipment, machine tools with surface polishing, etc., can solve the problems of working environment pollution, health hazards of operators, etc., to reduce environmental pollution, increase oxidation resistance and resistance. Corrosion, the effect of improving electrical conductivity

Active Publication Date: 2020-10-30
徐九生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the embodiment of the present invention provides a manufacturing process of conductive balls to solve the problems in the prior art that the working environment is seriously polluted and the health of operators is seriously endangered due to chemical rust removal and copper plating with cyanide.

Method used

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  • A kind of manufacturing process of conductive ball
  • A kind of manufacturing process of conductive ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The manufacturing process of the conductive ball of the present embodiment comprises:

[0036] 1) Select the available high-carbon steel shot blasting size. What this embodiment uses is the national standard S170 shot blasting. Take a sample of 250kg and place it in a barrel. At the same time, put 30kg of alumina ceramic balls with a diameter of 6mm and grind at a speed of 20rpm. After 10 hours, the alumina ceramic balls were separated and removed to obtain a high carbon steel substrate.

[0037] 2) Enter the electroplating line to electroplate the nickel-iron alloy layer. The plating solution used includes: nickel sulfate 230g / L, nickel chloride 40g / L, ferrous sulfate 18g / L, boric acid 40g / L, iron control agent 30mL / L, nickel plating Wetting agent 3mL / L, add water to make up 1L, wherein the iron control agent includes hydroquinone and catechol with a weight ratio of 2:1, and at the same time add hydrochloric acid with a concentration of 30g / L to make the pH value of ir...

Embodiment 2

[0041] The manufacturing process of the conductive ball of the present embodiment comprises:

[0042] 1) Select the available high-carbon steel shot blasting size. What this embodiment uses is the national standard S110 shot blasting. Take a sample of 250kg and place it in a barrel. At the same time, put 40kg of alumina ceramic balls with a diameter of 6mm and grind at a speed of 15rpm. After 12 hours, the alumina ceramic balls were separated and removed to obtain a high carbon steel substrate.

[0043]2) Enter the electroplating line to electroplate the nickel-iron alloy layer. The plating solution used includes: nickel sulfate 225g / L, nickel chloride 46g / L, ferrous sulfate 15g / L, boric acid 50g / L, iron control agent 15mL / L, nickel plating Wetting agent 4mL / L, add water to make up 1L, wherein the iron control agent includes hydroquinone and catechol with a weight ratio of 2.5:1, and at the same time add sulfuric acid with a concentration of 40g / L to make the pH value of iron ...

Embodiment 3

[0047] The difference between the manufacturing process of the conductive ball of this embodiment and embodiment 1 is that the nickel-iron plating solution, tin plating solution and corresponding electroplating process used are different, specifically:

[0048] 2) Enter the electroplating line to electroplate the nickel-iron alloy layer. The plating solution used includes: nickel sulfate 240g / L, nickel chloride 32g / L, ferrous sulfate 24g / L, boric acid 36g / L, iron control agent 45mL / L, nickel plating Wetting agent 2.5mL / L, add water to make up 1L, wherein the iron control agent includes hydroquinone and catechol with a weight ratio of 5:3, and at the same time add hydrochloric acid with a concentration of 40g / L to make the pH value of iron control 2.6 , when electroplating, the temperature of the plating solution is 55°C, the pH is 3.7, and the current density is 5.8A / dm 2 , Plating time is 72min.

[0049] 3) When the tin layer is electroplated on the surface of the nickel-iro...

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Abstract

The embodiment of the invention discloses a manufacturing process of a conductive ball, and belongs to the technical field of electronic elements. The process comprises the following steps that 1) physical derusting treatment is carried out on high-carbon steel shot blasting to obtain a high-carbon steel base material; 2) a nickel-iron alloy layer is electroplated on the surface of the high-carbonsteel base material; 3) a nickel alloy layer or a tin layer is electroplated on the surface of the nickel-iron alloy layer; and 4) the nickel-iron alloy layer is taken out, washed with water and alcohol, and drying is performed. According to the process, the physical rust removal and the nickel-iron plating solution process are adopted, so that the process is characterized in that the environmental pollution is reduced, the cost is saved, and the environment-friendly effect is achieved; an iron control agent can effectively inhibite ferrous ions to be oxidized into trivalent iron, the concentration of the ferrous ions in the plating solution is balanced, so that the nickel-iron co-deposition is realized without the influence of iron impurities in the continuous production process; nickel / tin plating machining is performed on the nickel-iron alloy layer, separation of iron in the subsequent use process can be effectively isolated, the oxidation resistance and the corrosion resistance of the conductive ball are improved, and the conductive performance of the conductive ball is improved.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of electronic components, in particular to a manufacturing process of a conductive ball. Background technique [0002] High Carbon Steel (High Carbon Steel) is often called tool steel, with a carbon content of 0.60-1.70%. After proper heat treatment or cold drawing hardening, high carbon steel has high strength and hardness, high elastic limit and fatigue limit. At the same time, it also has the advantages of easy availability of raw materials, low production cost, good cold and hot processability, and wide application range. However, high carbon steel is easily oxidized and corroded, which reduces the service life of high carbon steel products. [0003] Conductive balls are used as accompanying plating materials during electroplating of chip components. At present, the conductive ball is mainly made of high-carbon steel, and its surface is plated with a metal layer such as a nick...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25D3/12B24B31/02B24B31/14B24B27/033
CPCB24B27/033B24B31/02B24B31/14C25D3/12C25D3/562
Inventor 徐九生
Owner 徐九生
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