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Spray Tin Board Manufacturer & Assembly – One-stop service

Tin-sprayed HASL/lead-free HASL (Hot air solder leveling) is a step and process in the production of PCB boards. Such as spray tin board. Most commonly used in the industry. The process involves immersing the circuit board in a tin/lead alloy bath. Then using a “gas knife” to remove excess solder and blowing hot air across the circuit board surface.

Específicamente, la placa PCB se sumerge en el baño de soldadura fundida, de modo que todas las superficies de cobre expuestas queden cubiertas por soldadura. Luego, el exceso de soldadura en la placa PCB se elimina con un cortador de aire caliente. Porque la superficie de la PCB después de rociar estaño es similar a la de la pasta de soldadura. Entonces la fuerza y ​​confiabilidad de la soldadura son mejores.

Sin embargo, debido a sus características de procesamiento, la rugosidad de la superficie del tratamiento estañado no es buena, especialmente para componentes electrónicos pequeños como BGA, debido a la pequeña área de soldadura, si la planitud no es buena, puede causar un cortocircuito problemas, por lo que debe nivelarse. Mejor proceso para solucionar el problema de la hojalata.

Generally, the gold process is selected (note that it is not a gold plating process), and the principle and method of the chemical displacement reaction are used for reworking to increase the thickness of the nickel layer of 0.03~0.05um or 6um to improve the surface flatness.

tin-spray-double-sided-solderable-pcb

The main functions of the PCB spray tin board are as follows:

1. Prevention and oxidation of bare copper surface; copper is easily oxidized in the air, causing the PCB pad to be non-conducting or reducing the soldering performance. By tinning on the copper surface, the effective copper surface can be isolated from the gas to maintain the PCB. Continuity and solderability.

2. Maintain solderability; other surface treatment methods include hot melt, organic protective film OSP, chemical tin, chemical silver, chemical nickel gold, electroplated nickel gold, etc.

But the best cost-effective tin-plated PCB process Characteristics. The tin-plated plate consists of copper and tin two-layer metal which can adapt to the poor environment and the soldering performance is better in high temperature and corrosive environment. This kind of board is widely used in industrial control equipment communication products and military equipment products.

The advantages of tin-plated PCB: In the usual PCB surface treatment, the tin-spraying process is called the best solderability, because there is tin on the pad when soldering tin, with a gold-plated plate or rosin and OSP The process is quite easy. For hand soldering, it is very easy to apply in.

PCB board green oil Spray Tin Board

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