Metal Etching Process

Metal etching is the removal of materials using chemical or physical impact. Metal etching technology can be divided into two types of wet etching and dry etching. The following is the gold investment spot network editor to provide you with the relevant "metal etching principle is what?" Knowledge description:

Generally refers to the metal etching, also known as photochemical metal etching, refers to the exposure plate, after the development of the metal etching area will be the protective film removed in the metal etching contact with chemical solution to achieve the role of corrosion corrosion, Metal Etching the formation of convex or hollow forming effect.

It can be used in the production of brass, zinc and other printed embossed version, but also widely used to reduce the weight (Weight Reduction) instrument panel, nameplate and traditional processing is difficult to process the processing of thin parts, such as continuous improvement and process equipment Development, Metal Etching can also be used for aviation, machinery, chemical industry in the electronic sheet parts precision metal etching products processing, especially in the semiconductor process, Metal Etching metal etching is indispensable technology.

Metal etching is a new way of chemical cutting, this special chemical cutting method for the development of modern human science and technology has made outstanding contributions. The main areas of metal etching are: 1. The cutting-edge aerospace industry, chemical cutting has become the manufacture of aircraft, Metal Etching outer space vehicles, missiles and other large-scale overall structure of the standard processing methods; 2. Modern electronics industry, especially a variety of integrated chips Of the production, chemical cutting is other processing methods can not be replaced; 3. Ordinary civilian areas, more and more electronic chassis, dashboard, nameplate and so on a large number of chemical corrosion processing methods used to make their products to improve the decoration And grade, Metal Etching enhance the competitiveness of products in the market.

Metal etching refers to the metal in accordance with the design and process requirements carried out by a controlled etching behavior. Metal Etching Often this controlled chemical process can meet the design requirements of a particular occasion, and these requirements can not be achieved by traditional machining methods.

Chemical etching is very targeted, is specifically refers to the controlled etching, the metal through the chemical method to control a processing method. Chemical etching according to the surface effect after etching and processing requirements can be divided into chemical milling and chemical texture etching. 1. Chemical milling: chemical milling and mechanical milling has the same meaning, but the use of different processing methods only. Metal Etching Chemical milling requires a machined surface, as high as possible surface smoothness, as low as possible surface roughness, and as high as possible etch accuracy. 2. Chemical Texture Etching: Chemical Texture Etching refers to the surface after chemical etching, showing a roughness of the surface effect, Metal Etching and the size of this roughness can be through the process of chemical indicators and physical indicators of control in a certain range Adjustable.

Metal chemical etching in the "two control a match"

Chemical etching is a controlled chemical etch behavior, mainly through the "two control a match" to do in the chemical etching process of metal controllable etching. The so-called "two control", one refers to the chemical etching agent composition control, including: chemical etchant composition and the ratio between the concentration ratio; the second is the etching process processing methods and process control, including : Temperature, time, Metal Etching contact with the workpiece (such as the use of immersion etching or jet etching) and the workpiece in the solution in the direction of placement. The former also become a chemical indicator control, which can also be called physical indicators control. "A match" refers to the metal material and the etching solution, only for a metal etching solution to the kind of metal etching the best surface effect.

In the chemical milling of the "two control a match" requirements are: 1. Under the premise of ensuring the design requirements, the metal material as fast as possible etching speed; 2. In a variety of etching requirements to ensure that as low as possible Of the surface roughness. In order to meet these two requirements at the same time, Metal Etching we must choose some etching performance of the strong etching agent, using a higher concentration, and in the etching solution can be added to reduce the surface roughness of the added material.

Some metal materials, such as the choice of etchant, can achieve a high etch rate, but will increase the surface roughness after etching. Therefore, when selecting the type and concentration of the etchant, the surface roughness It is meaningful to make a chemical basis. Metal Etching The chemical milling can choose a higher temperature in the etching conditions, or use a jet method to increase the power of the chemical reaction, thereby increasing the etching rate. Different etchants for different metals, at higher temperatures etched surface roughness is not the same, in the selection of these process parameters to be noted. The same kind of metal material in different etching solution composition, after etching also have different roughness. For example, the surface roughness of aluminum and alloys after alkaline etching is much lower than that of halide ions. In the same alkaline etching, the addition of nitrate also increases the surface roughness. The surface roughness after etching is high under the condition that the iron ion concentration is low or no phosphoric acid solution and both halide ions are present.