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Impedance Control 8 Layer PCB Design High Tg FR4 4OZ / 140μm Heavy Copper

    Buy cheap Impedance Control 8 Layer PCB Design High Tg FR4 4OZ / 140μm Heavy Copper from wholesalers
     
    Buy cheap Impedance Control 8 Layer PCB Design High Tg FR4 4OZ / 140μm Heavy Copper from wholesalers
    • Buy cheap Impedance Control 8 Layer PCB Design High Tg FR4 4OZ / 140μm Heavy Copper from wholesalers
    • Buy cheap Impedance Control 8 Layer PCB Design High Tg FR4 4OZ / 140μm Heavy Copper from wholesalers

    Impedance Control 8 Layer PCB Design High Tg FR4 4OZ / 140μm Heavy Copper

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    Brand Name : Global Success Circuits Co.,Ltd
    Model Number : GSC-WE13D
    Certification : UL ISO 14001 TS16949 ISO 9001
    Price : US$ 0.35 - 5 / Piece
    Payment Terms : T/T, D/P, D/A, L/C, Western Union
    Supply Ability : 100,000㎡/Month
    Delivery Time : 5 - 15 days
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    Impedance Control 8 Layer PCB Design High Tg FR4 4OZ / 140μm Heavy Copper

    Impedance Control 8 Layer PCB Design High Tg FR4 4OZ / 140μm Heavy Copper


    Controlled Impedance


    What is Impedance?

    Impedance is the combination of the capacitance and inductance of a circuit when operated at high frequency. Though also measured in Ohms, it is somewhat different than resistance which is a DC characteristic. Impedance is an AC characteristic, meaning that it is related to frequency, resistance is not.


    What is Controlled Impedance?

    Unless you have carefully designed the trace and its environment, impedance is typically "uncontrolled", meaning that impedance will vary in value from point to point along the trace.

    At high frequencies, PCB traces do not behave like simple connections, controlled impedance helps us ensure that signals are not degraded as they route around a PCB.

    Essentially, controlled impedance is the matching of substrate material properties with trace dimensions and locations to ensure the impedance of a trace's signal is within a certain percentage of a specific value. Controlled impedance boards provide repeatable high frequency performance.


    When to Use Controlled Impedance

    When a signal must have a particular impedance in order to function properly, controlled impedance should be used. In high frequency applications matching the impedance of PCB traces is important in maintaining data integrity and signal clarity. If the impedance of the PCB trace connecting two components does not match the components' characteristic impedance, there may be increased switching times within the device or the circuit. There may also be random errors.


    What Determines Controlled Impedance?

    The characteristic impedance of a PCB trace is typically determined by its inductive and capacitive reactance, resistance, and conductance. These factors are a function of the physical dimensions of the trace, the dielectric constant of the PCB substrate material, and dielectric thickness. Typically PCB trace impedance can range from 25 to 125 ohms. The impedance value generated from the PCB structure will be determined by the following factors:

    – width and thickness of the copper signal trace (top and bottom)

    – thickness of the core or prepreg material on either side of the copper trace

    – dielectric constant of the core and prepreg material

    – distance from other copper features


    Applications of Controlled Impedance

    Controlled Impedance should be considered for PCBs used in fast digital applications such as:

    – Telecommunications

    – Computing 100MHz and above

    – High Quality Analog Video

    – Signal Processing

    – RF Communication


    Example of Controlled Impedance

    The most popular example of controlled impedance is the cable that connects the antenna to your TV. That cable may be a coaxial cable consisting of a round, inner conductor, separated from the outer cylindrical conductor commonly called the shield by an insulator. The dimensions of the conductors and insulator, and the electrical characteristics of the insulator are carefully controlled in order to determine the shape, strength and interaction of their electrical fields which will determine the electrical impedance of the cable.


    We can produce single ended impedance control PCB and differential impedance control PCB, We can set the impedance according to customer requirements and the best tolerance we can do is ±5%.


    Production Capacity


    ItemsMassPrototypes
    Layers1-16 Layers1-36 Layers
    Max. Panel Size600*770mm( 23.62"*30.31")600*770mm(23.62"*30.31") 500*1200mm(19.69"*47.24")
    Max.Board Thickness8.5mm8.5mm
    Min. Board Thickness2L:0.3mm2L:0.2mm
    4L:0.4mm4L:0.4mm
    6L:0.8mm6L:0.6mm
    Min Inner Layer Clearance0.1mm(4mil)0.1mm(4mil)
    Min Line width0.1mm(4/4 mil)0.075mm(3/3 mil)
    Min Line space0.1mm(4/4 mil)0.075mm(3/3 mil)
    Min.Hole Size0.2mm(8mil)0.15mm(6mil)
    Min plated hole thickness20um(0.8mil)20um(0.8mil)
    Min Blind/Buried hole size0.2mm(8mil)0.2mm(1-8layers)(8mil)
    PTH Dia. Tolerance±0.076mm(±3mil)±0.076mm(±3mil)
    Non PTH Dia. Tolerance±0.05mm(±2mil)±0.05mm(±2mil)
    Hole Position Deviation±0.05mm(±2mil)±0.05mm(±2mil)
    Heavy Coppe4OZ/140μm6OZ/175μm
    Min S/M Pitch0.1mm (4mil)0.1mm (4mil)
    Soldermask colourGreen,black,Blue,White,Yellow,RedGreen,black,Blue,White,Yellow,Red
    Silkscreen colourWhite,Yellow,Red,BlackWhite,Yellow,Red,Black
    OutlineRouting,V-Groove, Beveling punchRouting,V-Groove, Beveling punch
    Outline Tolerance±0.15mm ±6mil±0.15mm (±6mil)
    Peelable maskTop,bottom,double sidedTop,bottom,double sided
    Controlled Impedance+/- 10%+/- 7%
    Insulation Resistance1×1012Ω(Normal)1×1012Ω(Normal)
    Through Hole Resistance<300Ω(Normal)<300Ω(Normal)
    Thermal Shock3×10sec@288℃3×10sec@288℃
    Warp and Twist≤0.7%≤0.7%
    Electric Strength>1.3KV/mm>1.4KV/mm
    Peel Strength1.4N/mm1.4N/mm
    Solder Mask Abrasion>6H>6H
    Flammability94V-094V-0
    Test Voltage50-330V50-330V


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