Ceramic PCB: Simply speaking, it is a circuit board with ceramic base material;
Furthermore, in the condition of high temperature, the copper is gonna linkage to the surface of Al2O3 or AlN ceramic base board(Single-sided or Double-sided).
Yes! It’s definitely practical. NFC: Near Field Communication, by now, which is a vital part of mobile payment system. In other words, NFC antenna has became one of indispensable component in the fabrication of mobile PCBA.
As a matter of fact, the current tends to flow from high voltage to low voltage; The only difference is that the current turns higher when the resistance is lower. I guess, this is the phenomenon you observe in the circuit.
No worry, it’s not a big deal! Actually, if you find the same specification(equivalent), you can totally try to replace DIP resistor/ transistor/ capacitor with SMT/SMD ones.
Not really. Cold solder: Little solder around the solder point that is only easy to cause bad contact instead.
Possible reason: Poor solder paste or processing technology;
It depends. According to the metal base material, both copper and aluminum are used in PCB but with various application;
However, if we discuss this question from PCB Plating perspective, then we’ll get another totally different answer:
At present, USA is the most semiconductors manufacturer around the world;
While in China, Taiwan should be the No.1 in terms of manufacturing semiconductors.
If I understand what you mean correctly: “What is the direction of the current in the outside of the power supply when a switch is closed?”
Normally, in the outside of the power supply, the current flows from the positive electrode to the negative el