Method for etching anode of printed circuit board

A printed circuit board, anode etching technology, applied in the direction of removing conductive materials by chemical/electrolytic methods, can solve the problems of easy side etching, uneven etching lines, large etching coefficient, etc., and achieve uniform etching lines and etching speed. Fast, high-quality etching results

Inactive Publication Date: 2010-03-03
杨合生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems such as poor etching quality existing in the existing PCB etching technology, easy etching broken lines when making fine lines, or uneven etching lines, easy to produce side erosion and other technical problems, and provide a fast etching, etching PCB anode etching method with high quality, large etching coefficient and uniform etching lines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Micro-etching, cleaning and drying the surface of the workpiece

[0014] 2% H for microetching 2 SO 4 Aqueous solution, micro-etching for 2 minutes to reveal metallic luster, stop micro-etching, and send to the next process. Wash with flowing desalinated water for 2 minutes. Dry with electric hot air and send to the next process.

[0015] (2) Make an anti-corrosion shielding pattern on the surface of the workpiece

[0016] Use photosensitive resist ink or dry film to make an anti-corrosion shielding pattern on the surface of the workpiece.

[0017] (3) Etching with etching solution

[0018] (a) Preparation of etching solution: graphite: 2g / L, filtered with 6 μm filter material; H 2 SO 4 : 120ml / L, H 2 o 2 : 320ml / L, the etching solution is ready-to-use.

[0019] (b) Inject the etching solution into the electrolytic cell, connect the PCB with the positive electrode of the pulse power supply with a stainless steel fixture and place it in the etching solution...

Embodiment 2

[0024] (1) Micro-etching, cleaning and drying the surface of the workpiece

[0025] 1% H for microetching 2 SO 4 Aqueous solution, micro-etching for 3 minutes to reveal metallic luster, stop micro-etching, and send to the next process. Wash with running desalinated water for 1 minute. Dry with electric hot air and send to the next process.

[0026] (2) Make an anti-corrosion shielding pattern on the surface of the workpiece

[0027] Use photosensitive resist ink or dry film to make an anti-corrosion shielding pattern on the surface of the workpiece.

[0028] (3) Etching with etching solution

[0029] (a) Preparation of etching solution: FeCl 3 500g / L, HCl<5%, the specific gravity of the liquid is 39°Be; the management temperature is 50°C; the etching solution is prepared immediately after use.

[0030] (b) Inject the etching solution into the electrolytic cell, connect the PCB with the positive electrode of the pulse power supply with a stainless steel fixture and place...

Embodiment 3

[0035] (1) Micro-etching, cleaning and drying the surface of the workpiece

[0036] 3% H for microetching 2 SO 4 Aqueous solution, micro-etching for 1 minute, revealing metallic luster, stop micro-etching, and send to the next process. Wash with running desalinated water for 1 minute. Dry with electric hot air and send to the next process.

[0037] (2) Make an anti-corrosion shielding pattern on the surface of the workpiece

[0038] Use photosensitive resist ink or dry film to make an anti-corrosion shielding pattern on the surface of the workpiece.

[0039] (3) Etching with etching solution

[0040] (a) Preparation of etching solution: CuCl 2 500g / L, HCl<5%, the specific gravity of the liquid is 39°Be; the management temperature is 50°C; the etching solution is prepared immediately after use.

[0041] (b) Inject the etching solution into the electrolytic cell, connect the PCB with the positive electrode of the pulse power supply with a stainless steel fixture and place...

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PUM

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Abstract

The invention discloses a method for etching an anode of a printed circuit board, which comprises the following steps: (1) micro-etching, cleaning and drying the surface of a workpiece; (2) preparinga paintable and anticorrosive shielding pattern on the surface of the workpiece; (3) etching with etching liquid; and (4) performing finishing on the surface of the workpiece, wherein the step (3) comprises the following steps: injecting the etching liquid in an etching bath; connecting the printed circuit board with an anode of a pulse power source, and then putting the connected two serving as an anode into the etching liquid; connecting inert metal with a cathode of the pulse power source, and then putting the connected two serving as a cathode into the etching liquid; and serially connecting an ammeter in the circuit. The etching method has the advantages of quick etching, high etching quality, big etching coefficient, and even etching lines.

Description

technical field [0001] The invention belongs to the technical field of printed circuit board production, and in particular relates to an anode etching method for a printed circuit board. Background technique [0002] A printed circuit board (PCB) is a structural component formed of insulating materials supplemented by conductor wiring. When the final product is made, integrated circuits, transistors, diodes, passive components, and various other electronic components are mounted on it. Bare boards are also often called printed circuit boards. The substrate of the board itself is made of insulating and heat-insulating materials that are not easy to bend. Radial circuit boards are made of bendable substrates made of insulating and heat-resistant materials such as copper foil. , Rigid board or radial board, the small circuit material that can be seen on its surface is copper foil. Originally, copper foil covers the entire board, including radial copper clad laminates. Part of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/02H05K3/07
Inventor 杨合生杨合存
Owner 杨合生
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