What are the quality guarantees of mask fixture?

What are the quality guarantees of mask fixture?The quality assurance of etching mask plate fixture mainly comes from the control of etching process. The control of etching mask plate fixture process is divided into chemical parameter control and physical parameter control.   

1. Chemical parameter control

Chemical parameter control is very important to maintain the etching solution lasting and uniform etching speed. Chemical parameter control mainly includes the control of solution concentration and the proportional control of components in the solution.For the control of these two aspects, the concentration of the former is easy to control and the consumption of components in the solution can be determined by means of analysis.For the latter, it is more difficult to control, mainly because the content of added substances in the etching liquid is low, and it may be some organic materials that are difficult to analyze, or it may be difficult to separate from the main materials in the etching liquid.

Chemical control parameters based on the analysis of solution composition rather than experience, estimates that for small factory, of course, does not rule out the operator of the etch process can be observed intensity, by etching mask jig status and solution color adjusted again according to the experience, and meet the control to a certain extent.This method has certain practicability for etching liquid with single composition, but for products with complex composition and high uniformity requirement for etching mask plate fixture, this method has great limitations and is difficult to ensure the need for mass production.In order to ensure the stability of product quality, it is required that the analytical results can be used as the basis for adjusting the etching solution.

The analysis period of chemical etching solution is mainly affected by the following factors: 1.2. Initial concentration of the solution;3. Load per unit volume;4. Etching amount (in days).It is easy to understand the influencing factors of these aspects. In the case of small solution volume, low initial concentration of solution and large load per unit volume, the change rate of etching liquid composition is fast, and its analysis period is short, otherwise it is long.Generally speaking, if the etching solution volume is not large, in the case of mass production should be maintained every shift analysis.

2. Physical parameter control

The control of physical parameters can be divided into general parameter control and other parameter control determined by etching mode.General parameter control is mainly used to control the time and temperature in the etching process.Other parameters determined by the etching method include the control of the agitation of the solution immersed in the etching and the control of the injection pressure for the spray etching.In the controllable range of chemical parameters, the control of physical parameters is very important to keep the etching speed constant and the etching uniformity.The control of physical parameters is much easier and more intuitive than that of chemical parameters.At the same time, some devices have automatic controls for temperature, time and injection pressure, and only need to input these parameters in advance.

Any etching mask fixture must have two indicators to control, namely depth and surface smoothness.Although the change of the physical and chemical factors will affect the etching depth and surface smoothness, but in certain cases, etching liquid composition and concentration of the depth of influence is mainly physical factors, on the premise of constant temperature, pressure, and ensure the etching depth index factor is the etching time, in the actual production is also on the depth of etching under effective control by the time.For the surface smoothness, although the change in temperature will have certain influence, but is mainly influenced by the etching liquid chemical components, added in the chemical material effect on the surface smoothness is greater than the effect of etching the main agent, at the same time adjustment is more difficult, but it can be determined by the experiment a unit area of consumption experience to control.

Zhuolida has an imported etching processing line and a vacuum diffusion welding workshop, which can manufacture various kinds of grinding cruises, mask clamps, linear fine tuning plates, automatic dispensing plates, automatic sealing plates and other special equipment for the crystal industry.Mask fixture consultation hotline: 0513-81601668.