(Except Chinese public holidays)
Before discussing the importance of LPI solder masks, let's start with the PCB basics. A PCB (Printed Circuit Board) is like the backbone of any electronic device. It's like a canvas or board with interconnected electronic parts to do a specific job. Creating PCBs requires careful attention to detail. This is where the LPI solder mask is usually used.
● In screen printing, manufacturers place a stencil with openings for the solder mask over the PCB, and the solder mask material is forced through the stencil onto the PCB surface using a squeegee.
● Another way that the manufacturer uses is air spray or spray coating with a spray nozzle. And the only loophole in this method is LPI mask wastage with multiple spray guns.
● In the electrostatic spray method, the ink is atomized within a rotating bell, and the LPI solder mask is drawn toward the circuit board due to its negative charge. However, it may cause a less uniform coating.
LPI Solder Mask may not be the star of the show, but it's undoubtedly the unsung hero in the world of PCBs. From the idea to tangible parts, it is very important to ensure electronic device reliability. So, the next time you use a fancy gadget, remember that inside it is a carefully designed circuit board with a protective covering to keep its complicated parts safe.
Looking for a PCB or PCBA quote? Contact us now.
Prevwhat is a solder bridge | how to avoid it in pcb design
Nextpcb via: a deep dive into pcb via types, properties, and design