The high-frequency circuit board includes a core board provided with a hollow groove and a copper clad laminate adhered to the upper and lower surfaces of the core board by flow glue.
Because the "double-sided reflow process" requires two reflows, there will be some process restrictions.
The lives of modern people are increasingly inseparable from electronic products, and copper foil is its base. The 6-micron thick copper foil breaks through the existing technology, and its future will penetrate into all aspects of life.
Through a series of inspections, tests and aging tests and other technical means, the PCB can be guaranteed to work reliably for a long time (usually 20 years).
Some PCBA processed products may encounter white spots. White spots usually occur during welding or post-welding cleaning, and are mainly manifested as white spots or white residues on or around the surface of PCB, pin and solder joint.
