The reason for blocking holes in etched mesh

The reason for blocking holes in etched mesh

The problems of blind hole and blocked hole mainly occur in the intensive etch mesh parts, because the etch mesh products have relatively small aperture and dense arrangement.And now the product requirements are higher and higher, the corresponding need for the etch mesh density is also higher and higher.Therefore, it is difficult to check the etching film even if there is partial exposure and poor development after exposure development. Only when checking the product effect after etching processing can it be found that there are blocked holes or blind holes in this part.Generally speaking, it will be scattered, which is difficult to avoid, after all, a dense etching mesh, there may be thousands of holes in the general case, the dense etching mesh hole blocking rate is less than 5%, many customers are acceptable.However, if the hole is blocked in a large area, it is the cause of the production process, and the acceptance rate of such products is unacceptable.

There are two main problems of blind hole and blocked hole. Here is a brief introduction:

1. Dust or impurities on the product materials lead to inaccurate etching patterns and affect the etching effect of the mesh micropores, mainly because the purification level of the dust-free workshop is not up to standard, or there are certain impurities in the photographic ink that affect the development effect and cause hole blockage.Nantong zhuolida has a dust-free workshop with a high purification level. All employees in the dust-free workshop have been trained in the dust-free room to reduce the surface uncleanness caused by human factors.

2. The so-called warped film caused by warped film is just a saying in the etching industry, that is, in the etching process, the area that does not need to be etched enters the chemical potion and causes the surface micro-corrosion phenomenon, generally presenting a layer of white surface, a little rough.The cause of this phenomenon is generally the metal surface in addition to the oil is not clean led to photosensitive ink coating or photosensitive film adhesion decreased.