PCB circuit board in the production process there are a lot of bad problems occur, which tin beads caused by short-circuit failure and other problems, always let a person can not prevent.
Manufacturers of the most common three bell drilling design is divided into three main points “hole type” “hole properties” “hole between the moment”; let's learn together!
The design of the splicing of multilayer PCBs is not only related to the quality of the board, but also has a direct impact on the cost of production of multilayer PCBs.
Aluminum PCB is a metal-based copper-clad laminate with excellent heat dissipation performance. Its structure usually includes three layers: a layer of copper foil as the circuit layer, an insulating layer and a metal aluminum base layer.
The main features of HDI circuit boards are multi-layer circuits, thin sheets, small apertures, dense wiring and fine circuits. They are widely used in mobile phones, computers,and other fields.
We all know that the circuit board in the reflow furnace is prone to board bending and board warping, that how to prevent PCB boards over the reflow furnace board bending and board warping?