In the design of the circuit board, with the rapid increase of frequency, there will be many interferences different from the design of the low frequency PCB. As the frequency increases and the contradiction between the miniaturization and cost reduction of PCB boards becomes more and more prominent, these interferences
Ceramic circuit boards are actually made of electronic ceramic materials and can be made into various shapes.Among them, the ceramic circuit board has the characteristics of high temperature resistance and high electrical insulation performance, and has the advantages of low dielectric constant, low dielectric loss, high thermal conductivity, good chemical
PCB materials types included HB sheet and V0 sheet
HB sheet has low flame retardancy and is mostly used for single-layer PCB. VO sheet has high flame retardancy. It is mostly used in double-sides and multi-layer boards. This type of PCB sheet meets V-1 fire rating requirements and becomes FR-4 sheet.
In the early PCB manufacture, HASL is the most widely used surface treatment, which has excellent welding performance and low cost.With the high precision PCBs developing, it is difficult to below the surface to smooth of HASL, which brings difficulties to SMT mounting. In addition, the service life of HASL
Via, through hole, blind hole, buried hole, partial depth hole, countersink hole, back drilling and press-fit hole, is it very dizzy? I will take you to know all kinds of holes in PCB.
PCB via
PCB via is an important part of PCB. It is the electrical connection guide hole between different
We begin choose PCB manufacturer after a PCB be finished layout. What jobs do we need to do before we choose the factory?
1. Outputs gerber file and drilling file
Some engineer designed the PCB files and sent them to the PCB board factory directly. The PCB board factory has to transform
In printed circuit board manufacturing, printed circuit boards made with Multiwire board and Additive Process technology do not have to be etched. The printed circuit boards made by subtraction process need etching process to form conductive graphics. Under the protection of the graphic mask, the etching removes the copper that
Nowdays the assembly density of components on PCB is getting higher and higher follow the miniaturization, thinning and high speed of electronic products. And the transmission speed of the electric signal is getting faster and faster, it is difficult to meet the higher assembly requirements only increasing the wiring density
1.Heat dissipation
Conventional PCB substrates are generally hot undesirable conductors, The interlayer insulating material has a very slow heat emission. The internal heating of various electronic devices and power equipment can not be eliminated in time, result high speed components failure. But the metal core PCB has good heat dissipation. The
Flexible PCB is a kind of soft printed board material which appeared in 1970s. The base material is made of polyimide or polyester film. Flexible PCB is good reliable and excellent flexible,and its output is close to the output of rigid pcb.FPC widely used in portable communication equipment, computers, printers
