What effect can PCBA have after passing through furnace for many times

In the process of PCBA processing, some PCBA boards that need to be pasted on both sides need to be reflow welded twice. If there are inserted components and wave soldering, then PCBA needs to be welded three times over the furnace.

PCBA

PCBA has a great influence on PCB and the components on the board.

1. Influence on PCB

PCBA has been baked in high temperature for many times, which is easy to cause the warping of PCB, especially for some thinner and larger PCB, the carrier can be used to prevent warping. In addition, OSP process PCB into the high-temperature baking for many times, will lead to serious PCB solder pad oxidation, resulting in tin poor.

2. Influence on components

The most direct effect of PCBA passing through furnace for many times is that it is easy to damage components. Because the temperature of lead-free welding is higher, the welding temperature is above 250℃, which is harmful to components. In addition, it is easy to cause components to drop.

In the PCBA processing process, try to reduce the over-furnace fixture. If the over-furnace is needed for several times, the carrier can be added to reduce the damage to PCBA.