source:News release time:2023-06-13 Hits: Popular:PCB Assembly company
The silver board is called a spray tin board. Spraying a layer of tin on the outer layer of the copper circuit can also aid in welding. But it cannot provide long-term contact reliability like gold. There is no impact on already welded components, but reliability is not sufficient for pads that have been exposed to air for a long time, such as grounding pads, spring pin sockets, etc. Long term use can easily oxidize and rust, leading to poor contact. Basically, circuit boards used for small digital products, without exception, are tin coated because they are cheap.
Its advantages and disadvantages are summarized as follows:
Advantages: Low price and excellent welding performance.
Disadvantage: Not suitable for welding pins with fine gaps and components that are too small, as the surface flatness of the solder plate is poor. Solder beads are easily generated in PCB processing, which can cause short circuits in fine pitch components. When used in the double-sided SMT process, as the second side has already undergone a high-temperature reflow soldering, it is easy to cause tin spray to melt again, resulting in tin beads or spherical tin points like water droplets that drop due to gravity, resulting in a more uneven surface and affecting welding problems.
Previously, we mentioned the cheapest light red circuit board, which is a copper substrate for thermoelectric separation of miner's lamps.
Read recommendations:
Welcome information, we will answer for you quickly
No. 1 Jingtian Road, Xinsheng community, Longgang District, Shenzhen, Guangdong, China
+86 13715096176
Whatsapp/WeChat : +86 13715096176
Kevin.kuang@xzgcircuits.com
Return
