China Wholesale Prototype Pcb Assembly Manufacturers - 6 Layer ENIG Impedance Control PCB 10222 – Huihe
China Wholesale Prototype Pcb Assembly Manufacturers - 6 Layer ENIG Impedance Control PCB 10222 – 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 plate 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
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PTH line
LDI
CCD Exposure Machine
Application
Communications
Security electronics
Railtransit
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We rely upon strategic thinking, constant modernisation in all segments, technological advances and of course upon our employees that directly participate in our success for China Wholesale Prototype Pcb Assembly Manufacturers - 6 Layer ENIG Impedance Control PCB 10222 – Huihe , The product will supply to all over the world, such as: Munich, Germany, Honduras, Our product quality is one of the major concerns and has been produced to meet the customer's standards. "Customer services and relationship" is another important area which we understand good communication and relationships with our customers is the most significant power to run it as a long term business.
By Andrea from Miami - 2017.06.22 12:49
We always believe that the details decides the company's product quality, in this respect, the company conform our requirements and the goods are meet our expectations.
By Fanny from Stuttgart - 2018.09.23 17:37