2.7mm wooden melamine coated fiberboard backup sheet for PCB

  • Composition

    PCB sheet material composition  

          Yueshan have created a melamine. wooden sheet for PCB drilling that responds to the increasing. demand of today’s rigid drill room needs. that want a robust drill back up board. wooden melamine coated board uses the best quality. raw materials fibreboard sheets to make sure performance and consistency.

    wooden sheet pcb backup board

         A printed circuit board (PCB) is the board base for physically supporting and wiring the  surface-mounted and socketed components in most electronics. 

         In applications where fine conductive traces are needed, such as computers, PCBs are made by a photolithographic process, in a larger scale version of the way conductive paths in processors are made. 
          Electronic components are typically placed by machine onto a finished PCB that has solder dabs in place. The PCB bakes in an industrial oven to melt the solder, which joins the connections. Most PCBs are made from fiberglass or glass-reinforced plastics with copper traces.
          PCBs can be single-layer for simple electronic devices. Printed circuit boards for complex hardware, such as computer graphics cards and motherboards, may have up to twelve layers. PCBs are most often green but they can come in any color.
    Other methods of PCB manufacturing include silk-screening and CNC-milling.

           A printed circuit board (PCB) mechanically supports. and electrically connects electrical or electronic components using conductive tracks. pads and other features etched from one or more sheet layers of copper laminated onto. and/or between sheet layers of PCB sheet
          Find here PCB Sheet, Printed Circuit Board Sheet manufacturers, suppliers & exporters in India. Get contact details & address of pcb backupboard companies manufacturing in Yueshan

          wooden melamine coated fiberboard backup sheet  specification

      Use: PCB/FPC drilling hole

      Thickness: 2.5, 2.7mm±0.15mm

      Density: 980±30Kg/m3

      Surface Hardness: (80±5N/mm2 (Shores D) )


      fibreboard sheets size:

      37〞×49〞 41〞×49〞 43〞×49 〞

      939x1244 mm, 1090x1244 mm

      custom cut panel and sheet sizes obtainable. And can provide position hole drill service

      Quality control:The high-quality of wooden back up board. assured by the tightest manufacture tolerances. together with permanent product control corresponding to ISO 9001.

    storage: wooden melamine coated fiberboard backup sheet.  should stay sealed in its initial packing until use. It must stored beneath the same heat and humidity circumstances. that surround the operating area. Rapid change of the conditions may cause moisture fall out leading to next warp.

    Best storage at: 65° - 75°F (18° - 24°C)

           HOLE QUALITY: prepared timber. produce a high density fiber board (HDF) with a minimal natural resin level. that will not contaminate the hole,ideal repalace for phenolic board.

    altium pcb sheet size

          For a high-level look at how the Altium Draftsman Drawing System . provides an interactive approach to the creation of production documentation for your PCBs
          ltium comes by default with a 6-inch by 4-inch rectangular board outline when you create a new PCB object. Often times you can use that board outline and change it according to your needs as we will do here.



  • Description

    pcb sheet

          Yueshan top PCB laminate providers to bring you a wide range of material options. your choice of laminate material will depend on your design and application. Please note that the PCB material listed below may replaced by equal. or similar materials, according to available stocks on hand. Please inquire case by case when working with critical tolerances.

    pcb sheet price

          PCB Board - 6x4" (inches) General purpose board primarily used for etching your own boards. These are single sided only. ... All tough the prices are at a slight higher side than other websites. The packing was good and delivered on time. 

    drilling melamine process

          Drilling for adjustable shelves can be a problem in melamine. A sharp brad-point bit will make a clean hole, but the melamine is hard on the cutting edges and a typical bit will dull. Production shops use special carbide-tipped bits that are expensive and hard to find.
          For the weekend builder, the best way to drill holes in melamine is to use a router. A simple jig and a plunge router with a 5/8-in. guide bushing is the way to go. Use a 1/4-in. carbide down-spiral bit for flawless holes.
          Routers are great for cutting dadoes in melamine, because it assures a chip-free cut. Unfortunately, melamine is about 1/128-in. over 3/4-in. As a result, if you try to use a 3/4-in. router bit to cut a dado, it’ll undersized—not a pretty picture come assembly time. You can get around this by making a 1/2-in. dado and creating a 1/2-in. tongue on the ends of the shelf with a rabbeting bit.
         Typical wood glue won’t bond at all to melamine’s slick surface. That leaves you with a weakened glue joint where melamine meets particleboard. , you can buy specialized glue. that will bond melamine to a porous surface like particleboard. This is especially critical on more delicate joints, for instance. those used to construct a drawer.
          The easiest way to cover exposed screw heads is with Fast Cap self-stick caps. These discs come in typical melamine colors and they’re a cinch to apply peel and stick.
          Melamine needs to edged for a finished look. You can use iron-on edging, but self-stick edging is faster, easier and strong. peel, stick and give it a pass with a wood block or roller to push the adhesive into the particleboard. Maximum strength obtained in a week. One swipe with a double-sided edge trimmer cuts the tape flush.
          A flush-fit screw cap looks a whole lot better than the surface-applied caps. Plus, they are less prone to getting knocked off. The FlushMount carbide drill bit cuts a shallow 9/16-in.-dia. countersink for the self-stick cap. An adjustable brad-point bit protruding through the center. of the carbide bit drills the pilot hole. Both bits can adjusted for depth of cut. drill, screw and cover. The caps are almost invisible. The same system can used on wood-veneered sheet stock.
          Small nicks and gouges are easy to fix using SeamFil. It works like wood filler but it’s designed for plastic. work a little into the wound and scrape it flush using a putty knife. After the filler dries, use a utility razor to remove any excess. It makes a quick, easy repair that’s only noticeable at close range.



  • Product Advantage

    wooden sheets for pcb drill advantage

    DRILL wear: The Melamine coated board surface layers have undergone adjustments to. extract the abrasive components found in almost every other melamine board. The low-resin degree of the core also increases drill wear resistance created. by the remodified surface layer.

    BURR PREVENTION: A hard, smooth surface. with a satisfied thickness tolerance is an ideal exit platform. for some drill applications.

    HOLE VERIFICATION: White surface area assists distinguish holes drilled melamine board completely.

          Today’s multilayer PCBs feature both through holes and via holes. Through holes have diameters of 5mils or larger. and they are the deepest holes; hence they have high aspect ratios. and are most conveniently mechanically drilled. Via holes are either blind vias or buried vias. Blind vias exposed to one side of the board and stop at the next underlying copper layer. Buried vias start out as blind vias. and are thereafter embedded in the multilayer PCB. connecting the two copper layers intermittent. in the multilayer PCB structure.

          This accomplished by stacking multilayers together. The challenge for any via is to drill through the first copper layer. then drill through the underlying composite material. for example (FR4) without damaging the next copper layer. NSI Laser has developed a dual-head UV/CO2 system to address this exact challenge. The UV laser drills though the first copper layer, but only into the FR4. The CO2 laser is the most suitable for the FR4, and many other composite materials used in PCBs. The most unique feature with the CO2 laser light is that it stops at the second copper layer. The two lasers can operate simultaneously on different parts of the panel PCB panel. reducing the drilling process time.
         Creating via holes by conventional mechanical drilling technology . can only done by careful control of the height. The less the hole diameter, the more difficult mechanical drilling becomes. Another challenge is the aspect ratio (hole diameter to hole depth). Mechanical drilling is suitable for for deep holes with aspect ratios much larger than 1:1. But, when the hole diameter goes below 4mils (100microns), mechanical drilling becomes impossible.
         By comparison, with laser drilling the smaller the hole diameter, the deeper the hole. This is valuable as today’s high density PCBs need smaller and smaller via holes. Thus, laser drilling has gaining in popularity. And this trend is growing. as even higher density PCBs become necessary to accommodate. even more electronic circuitry over a small area. Laser drilling offers a long pathway of opportunities with many more parameters. which can impact the drilling. Not until hole diameters and PCB layer thicknesses approach the micron level. will today’s laser drilling reach. its physical limits.

    pcb sheet material

         PCB Material Composition PCB generally consists of four layers. which are heat laminated together into a single layer. The material used in PCB from top to bottom includes. Silkscreen, Soldermask, Copper and Substrate.
         The last of those layers, substrate. made of fiberglass and is also known as FR4, with the FR letters standing for "fire retardant." This substrate layer provides a solid foundation for PCBs. though the thickness can vary according to the uses of a given board.
          A cheaper range of boards also exist on the market that don't use the same remove PCB materials. but instead consist of phenolics or epoxies. Due to the thermal sensitivity of these boards, they tend to lose their lamination . These cheaper boards are often easy to identify by the smell they give off when soldered.
         PCB second layer is copper. which laminated onto the substrate with a mixture of heat and adhesive. The copper layer is thin, and on some boards there are two such layers - one above and one below the substrate. PCBs with only one layer of copper tend to used for cheaper electronics devices.
          The massively-used copper clad laminate (CCL) can classified into different categories. according to different classification standards including reinforcing material. used resin adhesive, flammability, CCL performance. The brief classification of CCL shown in the following table.
          Above the green soldermask is the silkscreen layer, which adds letters. and numerical indicators that make a PCB readable to tech programmers. This, in turn, makes it easier for electronics assemblers to place each PCB in the proper place. and in the right direction on each component. The silkscreen layer is usually white, though colors. such as red, yellow, gray and black are also sometimes used.

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