A good switch, after the experience of reflow soldering after the press is not moving, very poor. Many customers are also responding to this problem, so what is causing it? The patch switch is closely attached to the PCB, and the PIN will be solder paste. If the hole of the steel mesh is a little larger, the solder paste is easy to flow into the inside of the switch. If there is a foreign body in the inside of the switch, it will certainly affect its travel, the most common is to press it. Another situation is that the switch sealing performance is not good, flux flow into the inside of the switch, so the problem comes. Therefore, it is suggested that our customers should pay attention to this problem in the production process. In particular, I would like to remind you that the side button touch switch on the market is the most often encountered this situation, sometimes it is difficult to explain to customers, there are some experienced factories will be very good to eliminate this problem.

 

: light touch switch does not eat tin, false welding phenomenon, foot rust problem?

 

Many customers in the production process, found that the switch PIN foot does not eat tin, often false welding phenomenon. Switch material has feet of iron and copper PIN the feet, through the high speed punch stamping after plating to assemble into the switch, the switch is PE bag packing, as we all know this is not the best way of packing, the best way of packing is vacuum packaging, the foot switch is easy to contact with air, air contact for a long time, switch feet will oxidation, more serious foot will rust, This is the case in iron feet, it is recommended that you use copper feet silver feet. Once the foot oxidation will appear do not eat tin and false welding phenomenon. There is another possible problem. If the PCB's foot position is too large, it is easy to have the problem of false welding switch. It is suggested that both suppliers and customers should pay attention to this problem.