How to Judge the Quality of the Blind & Buried Vias in PCB
Blind & buried PCB is a high density, high precision printed circuit board. Its special structure and complex technology are widely used in high-end electronic products. If you buy poor quality products, there will be various problems need to be dealt with. So in order to avoid this situation, how should we judge the quality of blind & buried vias in PCB? 1. Check the diameter, depth and wall thickness of blind vias These aspects of qualified blind & buried vias all meet the standard requirements, while unqualified one s may have quality problems in these aspects . Such as the hole diameter is too large, the hole depth is not enough, the hole wall is too thin and so on. 2. Check the piercing quality of blind vias Qualified blind & buried vias should have no burr, no broken edges, and no crack when piercing, while unqualified ones may have these quality problems. These probl...