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Electroless copper plating method for helical line for travelling wave tube

A technology of electroless copper plating and helical wire, applied in the manufacture of slow wave components, microwave electric vacuum field, can solve the problems of discontinuous conductive surface, uneven coating, poor adhesion of electroplating layer, etc., to achieve good inner and outer surface consistency, The effect of good coating uniformity and good coating quality

Inactive Publication Date: 2012-02-01
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During electroless copper plating, since the helix itself is spring-like and the conductive surface is discontinuous, the potential distribution between the cathode and the anode in the electroplating solution is uneven. Uneven coating, poor adhesion of electroplating layer, prone to peeling, burrs and other phenomena, affecting the quality of electroplating surface

Method used

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  • Electroless copper plating method for helical line for travelling wave tube
  • Electroless copper plating method for helical line for travelling wave tube

Examples

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Effect test

Embodiment 1

[0013] 1. Preparation of electroless copper plating solution: Prepare copper plating electrolyte according to the following ingredients: copper sulfate 250g / L, sulfuric acid 60g / L, absolute ethanol 50g / L; take copper sulfate according to the calculated quantity, and dissolve copper sulfate in Filter hot water at 60°C into the tank, cool to room temperature, add a certain amount of sulfuric acid while stirring, then add absolute ethanol, pour the required amount of tap water into the tank, and stir the electrolyte with a stirring fixture.

[0014] 2. Put the two copper anode plates 2 required for electroplating into the electroplating solution 5 of the electroplating tank 1, place them on both sides of the electroplating position respectively, and connect the anode of the electroplating power supply; connect a cleaned copper rod 4 to the electroplating The cathode of the power supply is placed above the electroplating solution; the spiral wire 3 that has been chemically cleaned ...

Embodiment 2

[0020] 1. Preparation of electroless copper plating solution: Prepare copper plating electrolyte according to the following ingredients: copper sulfate 250g / L, sulfuric acid 60g / L, absolute ethanol 50g / L; take copper sulfate according to the calculated quantity, and dissolve copper sulfate in Filter hot water at 70°C into the tank, cool to room temperature, add a certain amount of sulfuric acid while stirring, then add absolute ethanol, pour the required amount of tap water into the tank, and stir the electrolyte with a stirring fixture.

[0021] 2. Put the two copper anode plates 2 required for electroplating into the electroplating solution 5 of the electroplating tank 1, respectively place them on both sides of the electroplating position, and connect the anode of the electroplating power supply; connect a cleaned copper rod 4 to the electroplating The cathode of the power supply is placed above the electroplating solution; the spiral wire 3 that has been chemically cleaned ...

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Abstract

The invention discloses an electroless copper plating method for a helical line for a travelling wave tube. The method comprises the following step of performing flash plating, electroplating and reverse electroplating on the helical line, wherein electroplating solution consists of copper sulfate, sulfuric acid L and absolute ethyl alcohol. The helical line which is electroplated by the electroless copper plating method for the helical line for the travelling wave tube has the advantages of high quality and bright surface coating without obvious defects, high coating uniformity, high consistency of inner and outer surfaces, strong adhesion and capability of better meeting the use requirements of the travelling wave tube after being sintered.

Description

technical field [0001] The invention belongs to the field of microwave electric vacuum, in particular to the field of manufacturing slow wave components of helical traveling wave tubes. Background technique [0002] In the microwave field, the traveling wave tube is the best device that combines bandwidth and gain. Among them, the helical traveling wave tube is the most widely used, and its high-frequency circuit is generally a helical metal wire or metal strip, which consists of three or More dielectric rods are clamped and secured within the metal tubular casing. The basic role of the helical wire is to provide a high-frequency electromagnetic wave with an axial propagation speed close to the electron motion speed and a sufficiently strong axial electric field, so that the electromagnetic wave interacts with the electron beam to amplify the signal. The metal wire is called a helix. As a carrier for high-frequency energy and electron beam energy exchange and high-frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/18C25D7/00C25D5/00
Inventor 吴华夏贺兆昌张文丙朱刚刘志意王瑞董晨
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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