100% Original China Prototyping Board - 6 Layer FR4 ENIG Impedance Control PCB – Huihe
100% Original China Prototyping Board - 6 Layer FR4 ENIG Impedance Control PCB – Huihe Detail:
Factors Determining Controlled Impedance
The characteristic impedance of a PCB is usually determined by its inductance and capacitance, resistance and conductance. These factors are functions of the physical size of the circuit, the dielectric constant and dielectric thickness of the PCB substrate material. In general, the line impedance of a PCB ranges from 25 to 125Ω. The PCB structure that determines the impedance value consists of the following factors:
Width and thickness of top and bottom copper signal lines
Width of top and bottom copper wires. The inner layer process range of the assembly and circuit is 0.5oz 3/3mil to 6oz 15/12mil copper signal line, and the outer line distance varies from 1/3oz 3/3mil to 6oz 15/12mil.
Core plate or semi-cured sheet thickness on both sides of copper wire
The semi-cured sheet is used as a bonding layer to hold all core boards together in a PCB. When designing the impedance control PCB, the thickness of the semi-cured sheet on both sides of the core board should be the same.
Dielectric constant of core PCB and semi-cured sheet
If the dielectric constant of the core plate and the semi-cured sheet are different, the impedance will also change. Therefore, the dielectric constant of the two should be the same.
Equipment Display
Automatic Plating Line
PTH Line
LDI
CCD Exposure Machine
Product detail pictures:
Related Product Guide:
We believe in: Innovation is our soul and spirit. High-quality is our life. Consumer need to have is our God for 100% Original China Prototyping Board - 6 Layer FR4 ENIG Impedance Control PCB – Huihe , The product will supply to all over the world, such as: Gabon, Egypt, The Swiss, Being guided by customer demands, aiming at improving the efficiency and quality of customer service, we constantly improve products and provide more comprehensive services. We sincerely welcome friends to negotiate business and start cooperation with us. We hope to join hands with friends in different industries to create a brilliant future.
By Betsy from Indonesia - 2017.05.02 18:28
This manufacturers not only respected our choice and requirements, but also gave us a lot of good suggestions, ultimately, we successfully completed the procurement tasks.
By Amber from Sao Paulo - 2018.09.19 18:37