Method and device for eliminating pool effect

Abstract

The invention discloses a method and device for eliminating the pool effect. When the etching process is carried out on a circuit board, usually, a circuit board without water holes is directly etched, because the chemical liquid sprayed from the upper part in an etching machine has poor flowability, the etching uniformity is insufficient, and short circuit and abnormality are generated by etching. The solution of the invention is as follows: A: designing a hole drilling formula of a pool effect hole; B: drilling corresponding holes on the circuit board according to the hole drilling formula;and C: etching the circuit board after hole drilling to obtain a required circuit. By the method of the invention, when the circuit board is etched, exchange of the chemical liquid is accelerated, sothe etching chemical liquid on the circuit surface is fresh, thereby improving the etching effect, elevating the processing capacity and eliminating the water pool effect.

Description

technical field [0001] The invention relates to the field of high-density interconnect (HDI) production, in particular to a method and device for eliminating pool effect. Background technique [0002] As the circuit board wiring becomes more and more dense (such as 3 / 3mil, 2 / 2mil lines), the requirements for line etching are gradually increasing. At present, the etching line in the industry is mainly horizontal etching. The principle is to spray liquid medicine up and down to achieve line etching. The liquid medicine sprayed from above will form a pool effect on the surface of the circuit board due to poor fluidity. Due to the poor fluidity of the potion, the fresh potion cannot be replenished immediately, which will block the etching effect of the subsequent potion, resulting in insufficient etching uniformity, abnormal circuit short circuit and other quality problems. Under the limitation of the etching capacity of the old etching machine, a new process is needed to impro...

AI Technical Summary

Problems solved by technology

At present, the etching line in the industry is mainly horizontal etching. The principle is to spray liquid medicine up and down to achieve line etching. The liquid medicine sprayed from above will form a pool effect on the surface of the circuit board due to poor fluidity. Due to the poor fluidity of the potion, the fresh potion cannot be replenished immediately, which will block the etching effect of the subsequent potion, resulting in insufficient etching uniformity, abnormal circuit short circuit and other quality problems

Under the limitation of the etching capacity of the old etching machine, a new process is needed to improve this situation. In order to increase the flow effect of the potion and replenish the fresh potion immediately, there is no good solution so far.

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