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Acid etching solution used for copper or copper alloy surface and surface treatment method

A micro-etching solution and surface treatment technology, applied in the field of acid micro-etching solution and surface treatment, surface treatment of high-density interconnected printed circuit boards, can solve problems such as increasing treatment procedures, and achieve the effect of simple and easy treatment methods

Inactive Publication Date: 2008-07-30
SHANTOU ULTRASONIC PRINTED BOARD NO 2 FACTORY
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Copper surfaces must be cleaned before treatment, increasing the treatment process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The following examples will be used to further illustrate the present invention:

[0036] The surface treatment methods of the embodiments are all the same: the acidic microetching solution is brought into contact with the copper surface, and then the copper surface of the printed circuit board is covered with an organic coating layer. See Table 1 for the comparison between the acidic microetching solutions of Examples 1-4 and two existing common microetching solutions. Prepare an acidic microetching solution according to the ingredients shown in Table 1. At a temperature of 35°C, immerse in a 0.5OZ double-sided copper-clad board for 60 seconds, take it out and immerse it in 5% dilute sulfuric acid for 10 seconds, then rinse with water, and dry it with hot air. Paste DuPont's 930 dry film by dry method on the micro-etched double-sided board, and then use spacing / line width 400 / 15μm, 400 / 20μm, 400 / 25μm, 400 / 30μm, 400 / 35μm, 400 / 40μm, 400 / 45μm, 400 / 50μm, 400 / 55μm, 400 / 60...

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PUM

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Abstract

The invention relates to an acidic microetching solution used for the surface of copper or copper alloys, is characterized in that the solution contains poly-guanidine. The invention still relates to a method of treating the surface of copper or copper alloys and includes the following steps: firstly, the acidic microetching solution of the invention is used for contacting the surface of copper or copper alloys; and secondly, the surface is covered by an organic coating. Compared with the prior art, the invention has the advantages that the following requirements can be met at the same time, i.e. firstly, the copper surface is provided with a desirable roughness, which can provide enough adhesive power for the combination of the copper surface and the organic coating (a dry film for example); secondly, the treated copper surface is light-colored, friction-resistant and oxidation-resistant; thirdly, the copper surface does not need cleaning in advance, and the microetching and degreasing can be accomplished at the same time; and fourthly, the microetching amount can be as small as possible to meet the lamination requirement of the selective dry film.

Description

technical field [0001] The invention relates to an acidic microetching solution and a surface treatment method for copper or copper alloy surfaces, more specifically to an acidic microetching solution for high-density interconnected printed circuit boards and the use of the acidic microetching solution Method for surface treatment of high density interconnect printed circuit boards. Background technique [0002] In the manufacturing process of high-density interconnect printed circuit boards (ie, HDI-PCB), the surface of copper or copper alloy needs to be treated before covering the organic coating layer to improve the bonding of the organic coating layer and the copper surface. These organic coating layers include but are not limited to various dry films such as dry films resistant to acid etching, dry films resistant to electroplating in alkaline etching processes, and selective dry films in immersion gold processes. Depending on the purpose of use, the organic coating re...

Claims

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Application Information

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IPC IPC(8): C23F1/18
Inventor 莫少山黄志东时焕英林旭荣林海鸿潘伟明罗旭林吉平张学东
Owner SHANTOU ULTRASONIC PRINTED BOARD NO 2 FACTORY
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