PCBA process of the common problems and solutions

by:Rocket PCB     2020-08-03
SMT processing is the core technology, in the process of SMT SMT processing speed often limits the capacity of production line. A SMT processing production line to at least have a SMT components of high-speed placement machine and a regular size special size for SMT components of multi-function SMT machine. In the process of SMT placement processing will always encounter all sorts of problems. Rocket PCB factory below small make up to you to introduce the reason of these common problems and solutions. 1. PCBA processing poor wetting phenomenon: during the welding process, the base plate welding area and does not produce between solder after infiltrating metal reaction, cause less welding or leak welding. Cause analysis: ( 1) Wave soldering, the substrate surface gas, are prone to poor wetting. ( 2) When solder residual metal more than 0. Level of 005%, the flux activity is reduced, and poor wetting phenomenon happens. ( 3) Welding area surface contamination, surface with flux welding area, or SMT components generated on the surface of the metal compounds. Will cause poor wetting. Such as the surface of the silver sulfide, tin oxides at the surface of the all make poor wetting. PCBA processing/SMT solution: ( 1) Strictly implement the corresponding welding process; ( 2) PCB circuit boards and components surface should be clean; ( 3) Choosing the right solder, and set a reasonable welding temperature and time. 2. Made a phenomenon: to above components not contact pads at the end of the inclined state or had been exposed to solder ZhiLiZhuang. Cause analysis: ( 1) And the wettability of solder paste; ( 2) Electronic components itself prone to made a shape; ( 3) Reflow soldering temperature rise too fast, uneven heating direction; ( 4) Choose the wrong solder paste, no preheating before welding and welding area size selection error. Setting up reasonable solder printing thickness; Establishing reasonable reflow soldering area temperature rise; Storage and access the electronic components as required; Reduce molten solder from the end of components of surface tension; PCB circuit boards need to preheat, to ensure that the uniform when the welding heat.
Additionally, Rocket PCB Solution Ltd. has a few new features planned to roll out in the app to provide more convenience, comfort and options to our clients.
If pcb making service isn't meeting your needs, or you just want to see what else is out there, check out these content monitoring alternatives Rocket PCB .
pcb manufacturing services pcb making service offer a wide range of pcb manufacturing services and gave the user the choice of pcb manufacturing services, pcb manufacturing services and pcb manufacturing services.
Rocket PCB provides a number of pcb manufacturing services designed to handle pcb manufacturing services.
Rocket PCB Solution Ltd.’s model also predicts (i) a positive effect of management on firm performance; (ii) a positive relationship between product market competition and average management quality (part of which stems from the larger covariance between management with firm size as competition strengthens); and (iii) a rise (fall) in the level (dispersion) of management with firm age.
Custom message
Chat Online
Chat Online
Leave Your Message inputting...
Thank you for your attention. Please kindly describe your question first, or please send your inquiry to our email sales@rocket-pcb.com, and we will reply to you ASAP. Welcome, what can I help you?
Sign in with: