It is inevitable to produce side corrosion in the process of nickel foil etching network. Therefore, how to reduce side erosion to a small value of * has become the primary goal of various manufacturers, and the methods are mainly as follows:

A. select A highly efficient etching solution. * enables continuous use and regeneration of etching solution. Always be * active.

B. Develop or control the temperature of the etching solution suitable for your product.

C. Select the ideal etching method. If spray type is better. Other methods are poor, static etch side etch *. When using spray etching, the difference between upper spray and lower spray is larger, so the lower spray should be selected. This is because. If you choose top spray. The nozzle is down. Etch should be sprayed to the surface, etch solution residence time is long. Etch vertically and laterally. When the etch solution is sprayed to the surface, it falls immediately and the solution exchange rate is fast. There's always a new solution sprayed on the surface. Reduced the chance of side erosion and less side erosion.

D. Strict control of etching time. The method is to make the first piece first, select the etching time of *, take out the water immediately to flush once the ideal depth is reached (if there is a local etching that cannot be removed). Take out and clean and do local treatment). Later products are etched according to this time.

E. Appropriate addition of polymer film - forming substances as protective agents. The substance must be soluble in water and have a certain affinity for metal. The etching may adhere to the side wall of the metal.

Nickel foil etching net reactive atmosphere refers to the chemical solution or reactive gas used for etching. Wet methods of chemical solutions are used, there are methods of impregnating the material only in a stationary solution and methods of circulating the solution to make it flow, the latter method is effective when bubbles are formed at the point where the beam hits the material surface. In the reactive gas dry method, materials are placed in the etch chamber and the beam is illuminated from the outside through a quartz glass window. During shape processing, the material must be moved relative to the position of the beam. These include methods for fixing the beam, moving the material along the xY axis, and fixing the material, scanning the beam with a reflector. In the processing of fine shape, the method of fixing the beam and moving the material is more advantageous because the spot of the beam is small.

(1) in case of sudden power failure in production, open the cylinder and take out the plate immediately. Avoid excessive etching, such as blocking the plate of conveyor belt, immediately close the spray and open the cylinder and take out the plate.

(2) attention should be paid to the safety of nickel foil etching network. Especially the smell of ammonia, a lot of inhalation of harmful to the human body. Wear a gas mask or mask when manually adding the potion to prevent accidents. (3) prevent excessive volatilization of ammonia during the etching process of nickel foil etching network: during the etching process, ammonia and ammonium chloride should be continuously supplemented with the dissolution of copper. And the volatility of nitrogen is very large, usually in the plate should not be open too much, so as not to evaporate too fast. Potion consumption increases and do not make the board must remember to exhaust valve closed, so as not to waste ammonia. (4) nickel foil etching network to preserve sufficient amount of mother liquid: there is enough liquid liquid to change a cylinder of liquid liquid, the extraction of the liquid liquid is also very important, should be extracted in the liquid liquid content ratio * state, once the liquid liquid is abnormal and difficult to adjust the reserve mother liquid will play a key role. (5) the process of nickel foil etching network is very important, the environmental conditions of etching process are relatively bad, especially ammonia gas is very irritating, and to regulate the etching process, it must be "integrated" with the etching machine, etching parameters are not easy to maintain stability. Especially when the plate into the etching cylinder, perhaps out is a waste and can not find the reason. This requires the operator to be familiar with the equipment as an old friend knows its "character" and "disposition". From this point of view, etching operation should not be often replacement.

When etching nickel foil etching network, we will find that some parts of the material are not etched quickly, and we need to analyze such a situation

The causes of uncleaned etching are:

1. Corrosion speed is too fast

2, the corrosion potion is too thin, the concentration is not enough

Countermeasures: the corrosion rate can be reduced appropriately

Reasons for thread size are:

1. Etching temperature is too high

2. Development speed is too slow

Countermeasures:

1. Reduce etching temperature

2. The development speed is too slow

Based on the above points, problems can be analyzed and solved. Nickel foil etched mesh