Application and processing technology of HDI board
The HDI (High Density Interconnector) board, that is, the high-density interconnection board, is a circuit board having a relatively high line distribution density using the micro-bump buried hole...
Multilayer high-speed board with patch crystal oscillator needs to consider hollowing out neighboring plane layers in pcb design
Some patch crystals on multi-layer high-speed boards are sometimes designed to hollow out adjacent planar layers as shown below: This is a four-layer board with a patch crystal on the bottom. The...
Rigid-flex PCB wet-drilling and etchback three steps
Drilling and etchback are an important procedure before electroless copper plating or direct copper plating on a rigid-flexible printed circuit board after CNC drilling. In order to achieve a...
Japan's September PCB output fell for 13 months
According to the latest statistics released by the Japan Electronics Packaging Circuits Association (JPCA), the output of printed circuit boards (PCBs) in Japan fell by 4.8% from the same month last...
