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RF PCB Printed Board
RF PCB Printed Board
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  • What is Rogers PCB?
    What is Rogers PCB?
    • December 15, 2022

    What is Rogers PCB?  Rogers PCB is a type of high-frequency board that raw material is produced by Rogers company. Epoxy resin distinguishes it from traditional PCB boards (FR4). It uses a ceramic base as the high-frequency material and lacks a glass fiber in the middle. The thermal stability and dielectric constant of Rogers are superior. It can be utilized to address the shortcomings of PTFE substrates since copper foil and its dielectric constant thermal expansion coefficient have very similar properties. It is excellent for commercial microwave, radio frequency, and high-speed electronic design applications. Due to its low water absorption, it is perfect for high-humidity applications, giving clients in the high-frequency board sector access to the best raw materials and resources that fundamentally improve the quality of the finished product. Once they are aware of FR4's subpar performance at microwave frequencies, many PCB designers see Rogers as a need for high-frequency PCB materials. PCBs using the Rogers laminates are called Rogers PCB. A company called Rogers creates laminate materials that are utilized to create PCBs. PCBs are often constructed using the FR4 material, which is a glass fiber and epoxy resin hybrid. The FR4 laminates that Rogers supplies have stronger high-frequency characteristics. The primary materials they offer have high-frequency characteristics similar to Teflon. Rogers offers a wide variety of materials used for high-frequency PCBs with a relative permittivity ranging from 2.3 to 10.2 and low dielectric losses: Fluoroplastics RT/duroid series (RT500, RT600); Reinforced fluoroplastics RO3000 and RO4000 series; Hydrocarbon ceramics TMM; Reinforced laminates ULTRALAM 2000. All materials have a standard range of thicknesses and can have one- or two-sided metallization from electrodeposited or rolled foil (copper, brass, aluminum) of a given thickness. Rogers materials can be combined with FR4 to create printed circuit boards because they both have high properties (loss tangent, dielectric constant, etc.). The following beneficial qualities are offered by Rogers PCBs: Throughout the performance, they have the least amount of electrical signal loss. They also have the lowest dielectric losses. They offer efficient thermal function management. They have a wide variety of dielectric constant values. They offer the minimal outgassing capability, which is crucial for applications in space. Additionally, they feature effective impedance control. The ceramic hydrocarbon lamination of the Rogers PCBs is combined with an insulating dielectric layer. For electrical connections and changes, this layer functions as a poor conductor. In this case, good insulating materials include the oxides of metals and other substances like mica and porcelain. The special qualities of the insulating substance are enhanced by this use. This insulating layer significantly lowers the loss of signals on PCBs. Additionally, it aids in preservin...

  • Rogers 4350B PCB vs Megtron 6 PCB
    Rogers 4350B PCB vs Megtron 6 PCB
    • December 09, 2022

    Rogers 4350B  PCB vs Megtron 6 PCB PCBs are evolving with the continually increasing demands of the electronics and telecom market. We are sitting on the eve of widespread deployment of 5G wireless technology across the globe. This will mean that the underlying electronic devices (primarily cell phones and other network-dependent electronics) will need to cope with the high-frequency demands of the 5G technology. When it comes to high-frequency circuits, the most commonly used PCB material, FR-4, doesn’t seem to cut it. FR-4, while being widely used, tends to be a very loss-generating material in high-frequency circuits. For such circuits, specialized materials (laminates) are chosen. There is a wide variety of them available in the market, from season manufacturers like Isola, Itera, Taconic, Rogers, and Panasonic. Among them, two of the most commonly used materials are Rogers R04350B and Panasonic Megtron 6. Let’s see the difference between the two. Similarities between Rogers 4350B and Panasonic Megtron 6 Finding the low-loss material that will provide the best balance of performance and board cost for a given application is morecomplicated than simply comparing laminate datasheets and prices. Datasheets do not reveal which materials involve relativelymore or unusual processing steps during PCB fabrication, which can raise manufacturing cost. Consider Rogers 4350B and Panasonic Megtron 6, which have similar low Df and Dk values, have been used extensively in RF applications, and areincreasingly being used for high-speed digital products.Both are based on hydrocarbon resins; the Rogers resin has a ceramicfi ller. Neither laminate is available clad with quarter-ounce copper. The thinnest foil available for the Rogers material is half-ounce,and for Megtron 6, one-third-ounce.Both materials are available with low-profi le foils to prevent signal refl ections at highfrequencies. Both Rogers 4350B and Megtron 6 are specifically designed high-speed laminates. Both fall into the extremely low-loss category of laminates (if considered based on the loss). In terms of highest efficiency and least incurring losses, Rogers 4350B and Megtron 6 are second only to specifically designed extremely low loss, microwave laminates like Taconic RF-35TC. Both the materials are very similar when it comes to many electrical and transmission characteristics. Take the signal loss, for example. Megtron 6 tends to be the superior material for frequencies below 5, but over that, Rogers 4350B has a slight edge (just a shade better than Megtron 6). If we dive a bit deeper into the laminate material’s electrical performance properties, two other terms that you might have heard are Permittivity (Dk) and Loss tangent (Df). Megtron 6 has a Dk of 3.7 and Df of 0.002 at 2 GHz (3.3 and 0.004 at 10 GHz). Whereas Rogers 4350 has a Dk of 3.43 and Df of 0.0037 at 10 GHz. So in higher frequencies, Rogers 4350B has a bit of an edge in these commonly compared electrical characteristic...

  • High-Quality PCB Material That Meets Your Needs
    High-Quality PCB Material That Meets Your Needs
    • December 02, 2022

    High-Quality PCB Material That Meets Your Needs PBC specs and costs for printed circuit board prototyping and production vary depending on the PCB materials used. There are 1 or 2 layer boards that just need one pre-preg "core" and multiple layer boards that are constructed using two or more core types. Depending on the intended purpose and the needed thickness, pre-preg, a material comprised of thin layers of fiberglass "pre-impregnated" with a bonding agent or metal core in a sheet shape, comes in a variety of sizes. Your board's thickness can range from a few mils for flex boards to a quarter inch for hefty burn-in boards. Core materials resemble slim double-sided boards with dielectric materials such as fiberglass along with a copper foil placed on each side; these usually come in predefined thicknesses. PCB Prototype using FR4 A glass fiber epoxy laminate is the most popular family of substrates for printed circuit boards, or FR4. The most common material is FR4, but higher numbers (such FR4-06 and FR4-08) have lower dielectric constants and greater temperature coefficients. As you advance through the family, the temperature rises, with FR4 having a beginning Tg of 140 degrees Celsius and FR4-06 having a Tg of 170 degrees. PCB Prototype using Metal Core Metal Core is well-liked in printed circuit boards for light-emitting diodes because it is excellent at removing heat. A single layer MCPBC consists of a copper circuit layer, IC components, a solder mask, an aluminum and non-conduction layer, and a copper circuit layer. To assure the safety of the LEDs, the metal core works as an incredible heat sink. PCB Prototype Using Polyimide for Flexibility Polyimide is more durable than FR4 and can withstand higher temperatures, which makes it perfect for use in electrical insulation applications that adhere to class H standards. The polyimide is made up of a silicone adhesive structure and a thermoresistant polyimide layer. Edge connectors, gold edge fingers used in wave soldering, and reflow soldering methods used in PCB assembly are all safeguarded by it. The hue of polyimide is another intriguing characteristic. The majority of boards are produced in green, but polyimide is easily distinguished by its brown hue. PCB Prototype Using Teflon for High Frequency Base: PTFE/Woven glass Because Teflon is softer than FR4, PCB materials need special drilling. The idea that certain materials are exotic is no longer associated with them. A material that is readily available and has a track record of performance, PTFE/woven glass base materials enable both the rapid expansion of application operations and the fulfillment of high-frequency demands. PCB Prototype Using Arlon for Longer Life at Higher Temperatures For the PCB fabrication of high performance and frequency-dependent printed circuit manufacturing, use Arlon materials. Applications with large lifespan temperatures and lead-free soldering are two examples of common applications that are susceptible t...

  • Base Material of PCB
    Base Material of PCB
    • November 25, 2022

    BASE MATERIALS OF PCB The insulation, material makeup, and fire-retardant properties of the base materials are frequently used to classify substrates. Bakelite, fiberglass, and various plastics are common PCB base materials. Manufacturers of PCB substrates typically combine insulating prepreg materials made of glass-fiber non-woven material and epoxy resin laminated to copper foil to create copper foil substrates. The common types of PCB substrates are as follows : FR-4: Fiberglass + Epoxy Resin. This is the most common type of PCB substrate. As Tg is only about 130°C, the High Tg FR-4 is recommended for products requiring processing or operating at high temperatures. High Tg FR-4: Fiberglass + Epoxy Resin. This is the second common type of PCB substrates after the FR-4 PCB substrates with a glass transition temperature (Tg) over 150°C is called High Tg substrates. CEM-1: Fiberglass Fabric + Epoxy Resin coated on cotton. CEM-3: Fiberglass Fabric + Epoxy Resin coated on fiberglass non-woven fabrics. Ceramic PCB: Powder Ceramics + Fiberglass Teflon PCB: Teflon + Fiberglass Surface treatment of PCB: Due to the PCB's copper surface's propensity for oxidization in the presence of oxygen, exposed regions that aren't covered by the solder mask are given a surface coating to prevent oxidation. Surface finishes of diverse materials, costs, and protection capabilities are produced to fulfill the requirements of various ways of post-processing. These are the typical PCB surface finishes: Surface treatments include immersion silver, gold plating, HAL, LF-HASL, ENIG, and bare copper. To examine a comparison of several PCB surface finishes.

  • What is the base material of a metal core PCB?
    What is the base material of a metal core PCB?
    • November 17, 2022

    What is the base material of a metal core PCB? Metal-core PCB commonly use aluminum-based, iron-based (including silicon steel), copper-based, and CIC as the base substrate. 1.Aluminum-based substrate The most commonly used aluminum-based substrates for manufacturing metal-core PCBs are LF, L4M, and LY12, which require a tensile strength of 294N / mm. The elongation is 5%, and the thicknesses generally used are four specifications of 1mm, 1.6mm, 2mm, and 3.2mm. Generally, the thickness of the aluminum layer commonly used in the aluminum-based PCB used for communication power is 140um, and copper foil is attached above and below. 2. Copper-based substrate The commonly used copper-based substrates have a tensile strength of 245 to 313.6 N / mm2, an elongation of 12%, and generally five thicknesses of 1 mm, 1.6 mm, 2 mm, 2.36 mm, and 3.2 mm. 3.Iron-based substrate Generally used in production are cold-rolled rolled steel plates, which are low-carbon steels with thicknesses of 1mm and 2.3mm, or phosphorus-containing iron-based thicknesses of 0.5mm, 0.8mm, and 1.0mm. 4. Features of metal core PCB Heat dissipation Conventional PCB substrates are generally poor thermal conductors, and the heat dissipation from the interlayer insulation material is very slow. The internal heat of various electronic equipment and power equipment cannot be eliminated in time, resulting in high-speed component failure. The metal core PCB has good heat dissipation. The metal core has large thermal capacity and high thermal conductivity, which can quickly dissipate the heat inside the board. If the metal core is connected to the case and the external heat sink, the heat dissipation effect is better. Because electronic equipment and communication systems use metal-core PCBs, the fans in the equipment can be eliminated, the size of the equipment is greatly reduced, and the efficiency is improved, which is especially suitable for electronic equipment with closed chassis. Thermal expansion Thermal expansion and contraction are the common characteristics of materials, and the thermal expansion coefficients of different materials are different. PCB is a composite material composed of resin, reinforcing material, and copper foil. Its thermal expansion coefficient is anisotropic. In the XY axis direction, the thermal expansion coefficient CTE of PCB is 13 × 10-6 ~ 18 × 10-6 / ℃. The thickness direction (Z-axis direction) is 80 × 10-6 to 90 × 10-6 / ° C, the CTE of copper is 16.8 × 10-6 / ° C, and the CTE of the sheet-shaped ceramic body is 6 × 10-6 / ° C. From these data, it can be seen that the CTE of the metalized hole wall of the PCB and the connected insulating substrate in the z-axis is very different. If the heat generated cannot be eliminated in time, thermal expansion and contraction will easily cause the metalized hole wall plating to crack or disconnect. When soldering a ceramic chip carrier device on a PCB, due to the difference between the device and the PCB material CTE,...

  • What is the difference between PCB and metal core PCB?
    What is the difference between PCB and metal core PCB?
    • November 11, 2022

    What is the difference between PCB and metal core PCB? One important difference to understand between metal core PCB and standard PCB is how the materials work together to create the necessary result. In metal core PCB, there is a single layer of copper with is bonded to a layer of conductive dielectric material, which is further bonded to a thick metal layer (typically Aluminum 5052, Aluminum 6061, or Copper C1100). The dielectric used is approximately 6-7 times as thermally conductive as FR4. The dielectric is to be kept as thin as possible. This reduces the distance from the heat source to the metal plate which is more conductive than the dielectric. As you know, the metal plate on the bottom side is the thickest element in the structure. It is available in several different thicknesses, however, there are three most common thickness, such as 1.0mm, 1.5mm, and 3.2mm as they are the easiest to purchase. The metal also gives the PCB rigidity and does not require any surface finish or solder mask. FR-4 PCB Vs. Metal core PCB comparison Plated through holes: in general, plated through holes are used in FR-4 PCB. It can be through hole components if required. In metal core PCB, plated through holes are not available for 1-layer PCB. All components are surface-mounted. Conductivity: FR-4 PCB has low thermal conductivity, in general about 0.3W, however, MCPCB has a higher thermal conductivity between 1.0W and 4.0W, most commonly about 2.0W. Thickness: FR-4 PCB has a wide range of thickness, also uses many material combinations and layers. Metal core PCB has a limited thickness variation. Thermal relief: as usual, Thermal relief in FR4 PCB involves vias for heat transfer. And it has a longer drilling processing cycle. Metal core PCBs don’t require via as their own thermal dissipation. Consequently, they do not require drilling, deposition and plating processes. Solder mask: FR-4 PCB solder mask is dark colors such as green, red, black and so on, which usually applied on top and bottom. For LED boards, metal core PCB solder mask are almost exclusively white and they are only applied to the top. Machining process: FR-4 PCB uses standard processing such as drilling, routing, v-scoring, countersink, counterbore and so on. whereas in metal core PCBs, there is a distinctive difference in the v-scoring process i.e. diamond-coated saw blades are used for the added strain from cutting into metal.

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