Why does insufficient solder paste occur in SMT processing?

In fact,SMTIn processingSolder pastePrinting has a significant impact on the entire electronic processing procedure. If the solder paste is poorly printed, it is very easy to causeSMTProblems occur in surface mount processing products and need to be repaired. Insufficient solder paste is a relatively common issue among solder paste printing defects. Below, JJY Solder Paste Factory will briefly introduce the main reasons for insufficient solder paste to you:

1During the surface mount technology (SMT) processing, the solder paste was not replenished and added in a timely manner during the operation of the printing machine.

2The quality of the solder paste used in the processing plant is abnormal,For example, there are foreign substances such as hard lumps mixed in.

3The solder paste has expired,Be reused.

4The quality issue of the circuit board is that there are inconspicuous coverings on the solder pads, such as solder mask printed on the solder pads(Green oil).

5The fixing and clamping of the circuit board inside the printing press is loose.

6The thickness of the steel mesh is uneven.

7There are contaminants on the steel mesh or circuit board.

8,SMTDuring the processing, the solder paste scraper was damaged and the steel mesh was damaged.

9The equipment parameters such as the pressure, Angle, speed and demolding speed of the scraper are not set appropriately.

10The solder paste was damaged after printing due to human factors such as improper operation.

The above is all aboutSMTSome relevant introductions on why there may be insufficient solder paste during processing. If you need to know more about the products, please feel free to consult JJY Solder Paste Factory and leave a message online to interact with us.