【 JJY 】 What are the precautions for LED solder paste reflow soldering?

inLEDDuring the production process of the product, we will encounter some welding problems to a greater or lesser extent. If the welding is not done well, it will affect the entire processLEDThe quality of the product So, how can one weld betterLEDWhat about the product? Today, JJYSolder paste manufacturerTell everyone about it.LEDPrecautions during the solder paste reflow soldering process:

1.LEDControl of temperature and time in lamp solder paste reflow soldering

1,LEDAfter the reflow soldering temperature curve is adjusted, it is essential to conduct various quality confirmations after passing through the first boardOKOnly then can mass production be carried out. This is the work of the first piece confirmation in factory quality management.

2,LEDBefore performing reflow soldering work, it is essential to checkLEDCheck the factory specification sheet of the lamp beads to see their various technical parameters.

a.To watchLEDThe temperature resistance of the lamp bead packaging material;

b.To watchLEDWhat material is the welding base material, such as the common onePCB(Fiberboard, etc.), aluminum substrate, ceramic plate, etc.

c.It depends on the soldering agent, whether it is high-temperature solder paste, low-temperature solder paste or resin, etc.

d.To be based onLEDIt depends on the actual quality of the reflow soldering equipmentLEDThe control of parameters such as the number of temperature zones, electrode flow rate, fan, and temperature Settings for each zone in reflow soldering.

3,LEDReflow solderingLEDReference for the general adjustment parameters of the lamp beads;

Minimum temperature150-170Just a few degrees will do. The highest temperature is best240-245Degree (adjustable up to.260Degree, if245If the degree can dissolve, there is no need to adjust it260"Degree"220The time above degrees cannot be exceeded60Seconds. If the temperature is raised,260The duration of the degree cannot exceed10Seconds. If so7For the temperature zone, you can refer to the following Settings:160,170,175,180,190,210,245,220. IfLEDThe lamp beads are silicone lenses and can be usedBi58Sn42Solder paste, maximum temperature225Celsius; If soPCThe lens cannot be reflow soldered at all.

Ii.LEDPrecautions for solder paste reflow soldering conditions:

1Reflow soldering is only allowed to be done once.

2After reflow soldering is completed, do not squeeze the heat dissipation plate.

3If there is solder paste with a relatively low melting point, the temperature can be appropriately reduced.

4Before using the reflow soldering furnace, first measure with a temperature measuring instrument whether the temperatures in each temperature zone of the reflow soldering machine are consistent and uniform.

5,SMDThe recommended temperature curve for lead-free reflow soldering, regardless of how it is set, what is the maximum temperature260℃Cannot exceed10Second220℃Cannot exceed60Otherwise, it may cause at high temperaturesLEDProduct function failure;

6Different typesSMDThe peak temperature Settings of the products should vary, generally within the same categorySizeThe larger it is, the greater the stress release will be, and the high-temperature resistance capacity will relatively weaken.

Iii.SMDPatchLEDUse a soldering iron

1When performing manual soldering, the temperature of the soldering iron must be less than300℃The time cannot be exceeded3Second;

2Manual welding can only be done once.

Iv. Handling and preventive Measures

Compared with epoxy resin which is more brittle and hard, silicone packaging is softer and more elastic. Due to its characteristics, it greatly reduces thermal stress and is vulnerable to mechanical external force damage. Therefore, it needs to be handled correctly in manual processing.

1Pick up from the side of the material by using appropriate tools;

2Do not directly press the surface of the colloid with your hands or sharp metals, as it may damage the internal circuit.

3Do not stack the module materials together, as it may damage the internal circuit.

4Cannot be used inPH＜7An acidic environment.

JJY Solder Paste Manufacturer mainly engages in lead-free solder paste.SMTSurface mount solder pasteledThe research and development, production and supply of solder paste. For more knowledge about electronic soldering, you can follow and contact us. Welcome to interact with us.