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OS tracks all necessary information about each process running in the system in PCB. Process Control Block is a data structure representing a process in the OS.
Process control Block PCB is specially defined in the core of the OS for each process.
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#PCB Design
I am prototyping a PCB, using Chip Quik’s “SMDSWLF.031, a Sn96.5/ Ag3.0/ Cu0.5 solder with 2.2% no-clean flux. I find that the black spots appears frequently in larger pads on my board. I wonder if it is because I left the soldering iron more time heating the solder and that burnt the flux. What is that black residue? Is that a sign of a bad joint or maybe bad soldering technique?
Many assembly factories are asking for SMT jobs, while I think through hole would be a better option for a high voltage application. Before the high voltage project is started, we need to make a call on SMT or Through hole parts. Is there a study on this?
We are glad to find you have ISO and BSCI certification. Could you please tell what is the warranty of your PCBA product? I mean, on average.
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