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China Wholesale Main Printed Circuit Board Manufacturers - 4 Layer ENIG Impedance Control PCB 9115 – Huihe
About the impedance control In the case of transmission of high frequency signals, the controlled impedance helps to ensure that the signal does not decay significantly during transmission. In essence, controlled impedance refers to the matching of the material properties of the substrate to the characteristics of the line/dielectric layer to ensure that the impedance value of the line signal is within the tolerance of the reference value. Controlled impedance PCBs provide reliable and c... -
China Wholesale Automatic Stabilizer Circuit Board Factories - 4 Layer OSP Impedance Control PCB 8742 – Huihe
Characteristic impedance control of PCB The characteristic impedance of the conductor on thePCB is an important index of circuit design, especially in the PCB design of high frequency circuit, we must consider whether the characteristic impedance of the conductor is consistent with the characteristic impedance required by the device or signal. PCB impedance matching In the PCB, if there is a signal transmission, it is expected to be from the sending end of the power supply, in the c... -
China Wholesale Symphony Cooler Circuit Board Quotes - 2 layer High TG ENIG PCB 11590 – Huihe
About High Tg material Tg is the mechanical property that specifies the glass transition temperature, the maximum temperature at which the glass remains rigid.Normal PCB FR4-TG is 130-140 degrees, medium TG is greater than 150-160 degrees, high TG is greater than 170 degrees. Compared with standard FR4, high FR4-TG has better mechanical and chemical heat resistance and moisture resistance.The higher the Tg value, the better the heat resistance of the material, so, especially in the lead-... -
China Wholesale Embedded Pcb Pricelist - 6 Layer ENIG via-in-pad PCB 16942 – Huihe
How to understand half plug hole and full plug hole The whole plug hole is the whole through hole is blocked by green oil. Generally, TOP and BOT fill the hole with green oil on both sides, and the fullness is more than 80%. The half plug hole refers to the plug from one side, opaque, half plug hole, fullness is not good control, general factory can only do about 30-50%, according to the factory’s own ability, mainly used in, one side of the window, one side of the window area, such as s... -
China Wholesale Transparent Pcb Factories - 4 Layer FR4+Rogers PCB 29166 – Huihe
About High-frequency mixed-voltage PCB High-frequency mixed-voltage circuit boards are pressed using different laminated materials to optimize electrical performance and improve system reliability. The biggest challenge in manufacturing this type of high frequency PCB is to match the thermal expansion coefficient (CTE) of the different materials to fit the PCB manufacturing and component assembly. Typically, such circuit designs include a combination of FR-4 materials and PTFE laminated ... -
China Wholesale Small Scale Pcb Factories - 8 Layer FPC+FR4 Rigid-Flex PCB 8 – Huihe
Rigid-Flex PCB in consumer electronic products The first use of Rigid-Flex PCB in the field of battery modules, now look at all mobile phone brands around the world, the use of Rigid-Flex PCB battery has been a consensus, and may become a long-term trend. At the same time, in order to accommodate more lenses in smaller and smaller space, mobile phone lens module also began to use the Rigid-Flex PCB, in addition to gradually expanded to display and other mobile phone modules. As for the l... -
China Wholesale Custom Circuit Board Manufacturers - 8 layer ENIG impedance control PCB 14911 – Huihe
Challenges of the multilayer PCB Multilayer PCB designs are more expensive than other types. There are some usability issues. Because of its complexity, the production time is quite long. Professional designer who needs to manufacture multilayer PCB. The main features of multilayer PCB 1. Used with integrated circuit, it is conducive to miniaturization and weight reduction of the whole machine; 2. Short wiring, straight wiring, high wiring density; 3. Because the shielding layer is ... -
China Wholesale Surface Mount Prototype Board Pricelist - 6 Layer ENIG Impedance Control PCB 7201 – Huihe
PCB impedance line design 1.In the process of PCB LAYOUT, consider the basic conditions required to control the impedance are: line width, line distance, line length, impedance line shielding reference layer, according to these requirements will be placed in the appropriate position of the impedance line. 2. The shielding reference layer preferentially selects the line adjacent to the layer where the impedance line is located. The corresponding position of the impedance line is a complete cop... -
China Wholesale Circuit Board Assembly Pricelist - 6 Layer High TG Leadless Golden Finger PCB – Huihe
When need high temperature PCBs? If the working temperature of the product is higher than 130 ℃, a high Tg PCB is required to ensure safety. The main reason for using high Tg PCB is that the PCB needs to comply with RoHS directive, and the temperature required for lead-free solder flow is high, resulting in the substrate of printed circuit board needs to be high Tg material. Application of the High Tg PCB TG PCB is used in electronic industry which can run at higher temperature. By ... -
China Wholesale Double Sided Pcb Board Prototype Quotes - 4 layer Medium TG ENIG PCB 13270 – Huihe
About High Tg PCB High Tg means high heat resistance. With the rapid development of the electronic industry, especially the electronic products represented by computers, the development of high functionalization and high multilayer requires the higher heat resistance of PCB substrate materials as an important guarantee. With the emergence and development of high density installation technology, such as SMT and CMT, PCB is increasingly dependent on the support of high heat resistance of t... -
China Wholesale Red Circuit Board Pricelist - 8 layer ENIG Impedance Control Heavy Copper PCB 16555 – Huihe
Thin core heavy copper PCB copper foil choice The most concerned problem of heavy copper CCL PCB is the pressure resistance problem, especially the thin core heavy copper PCB (thin core is medium thickness ≤ 0.3mm), the pressure resistance problem is particularly prominent, thin core heavy copper PCB will generally choose RTF copper foil for production, RTF copper foil and STD copper foil main difference is the length of the wool Ra is different, RTF copper foil Ra is significantly less ... -
China Wholesale Main Printed Circuit Board Factories - 6 Layer ENIG impedance half hole PCB – Huihe
About Metallized Half Hole PCB The metallized half hole is a half hole at the edge of the plate and is electroplated. Metallized semi-holes are mainly used for the direct connection between plates. They are mainly used to weld together two printed circuit boards with circuit design technology. The whole system takes up much less space than a PCB system using a row pin connector. Design parameters of half hole PCB Min. Hole Diameter Minimum pad Minimum pad spacing The distance betwee...
