How to use solder paste?

Solder pasteIt is a kind of welding auxiliary material, which can improve the quality of the welding process and make the welding points more firm and reliable. Well, do you know how to use solder paste?

1Before production, the operator uses a solder paste mixer and a special stainless steel rod to stir the solder paste evenly, and regularly spot-tests the viscosity of the solder paste with a viscosity tester.

2The quality of solder paste printing is inspected during the production process100％Inspection, the main contents are whether the solder paste pattern is complete, whether the thickness is uniform, and whether there is any solder paste sharpening phenomenon.

3After printing, the solder paste on the printed circuit board should be thoroughly cleaned with ultrasonic cleaning equipment and then dried to prevent solder balls from forming after reflow soldering due to residual solder paste on the board when it is used again.

4Strictly use the solder paste within its validity period. The solder paste should be stored in the refrigerator on a daily basis and placed at room temperature before use2~4hOnly after that can the lid be opened for use. The used solder paste should be stored separately. When used again, it is necessary to confirm whether the quality is qualified.

5After the first printed circuit board is printed on the current shift or the equipment is adjusted, the thickness of the printed solder paste should be measured using a solder paste thickness tester. The test points should be selected at the top, bottom, left, right and middle of the test surface of the printed circuit board5Point, record the value. The thickness range of the solder paste should be within the thickness range of the template－10％～＋15％;

6After removing the solder paste, immediately close the inner cover. Press down forcefully to squeeze out all the air between the cover and the solder paste, ensuring that the inner cover is in close contact with the solder paste,Make sure the inner cover is pressed tightly before screwing on the outer large cover.

7After using the mesh plate, first clean the surface with a cloth dampened with alcohol, and then clean the openings of the steel mesh with a toothbrush dampened with alcohol,To thoroughly remove the residual solder paste on the inner wall of the opening of the steel mesh,Then, use non-fiber paper or non-fiber cloth to scrub both sides of the steel mesh simultaneously. After scrubbing and checking for no errors, immediately return it to the corresponding steel mesh position.

The above is some relevant knowledge about how to use solder paste introduced by the solder paste manufacturer. We hope it can help you use solder paste products. If you have any demand for solder products, please feel free to contact us by phone!