We know pcb drill-backup board for pcb drill factory-Yueshan

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Source:未知Author:admin Addtime:2019-11-13 17:06 Click:

drilling pcb board wood backing material

pcb drilling backup board entry board

       White Backup Board(white melamine backup board)is a new type of drilling cushion for small hole. and is applicable for small hole on precise multi-layer circuit board. Especially for the pinhole aperture, multilayer board and flexible board. Particularly designed to replace the Phenolic backup board. its surface hardness is as good as the Phenolic backup board. and accord with environmental protection standard .With its stabilize dimension. it’s difficult to distort and easy to deal with after using.
       As a professional PCB consumable materials supplier and established in 2003. we major in supplyingLaminate products: kraft paper. Drilling products: all kind of backup boards and entry boards. Further information please visit our website
1. Applicable for the drilling procedure of any fine circuit board.
2. Thickness 0.14~0.2mm&cjiamn;0.02mm, ingredient pure aluminum
(1100H18 NationalStandard ),to prevent burr on holes.
3. Fine heat conduction,remove heat generated by hole drilling.
4. Favorable rigidity,prevent vibration when drilling.
5. Favorable elasticity,prevent distortion and assure high precision.

pcb raw material

 pcb material problem

       Drilling  is  a  particularly  complicated  machining  process.  and  it  becomes  much  more complicated when the workpiece printed circuit boards (PCBs). PCB is composite materials with anisotropy. Even a small  defect in PCB may cause great losses. Both the drilling process and PCB structure  design.  have  been  researched  by  many  scholars.  But  the  investigations  into  the  drilling processes  of  PCB  are  not  systematic. 
 tool materials and geometrics, cutting force, cutting temperature.  radial run-out and damages  occurring in drilling  processes.  challenges in analysis and optimization for PCB drilling. Introduction In recent years, the  production  of printed  circuit boards (PCBs).  has  not only  increased  in quantity but also improved in quality. The  high  packaging density of PCB required to be  improved and miniaturized. For instance. the downsizing of televisions. and telephones has made it possible to change. these from stationary to portable devices. Thus,  high-quality micro-machining  is  necessary for PCB. 

     The  basic  materials  forming  a  board  are  an  epoxy  glass  mix.  made  by  impregnating  rolls  of woven  glass  cloth  with  resin. and  sheets  of  copper  foil  which  are  used  to  make  the  electrical connections [1]. A typical board may have many alternate layers of epoxy glass and copper foil. manufactured  by  squeezing in  a  large hydraulic  press.  The board  will  not become  a  circuit until connections  . are  made  between  the  different  copper  layers.  and  when  the  discrete  electrical components are  soldered  or  welded in place. Thus,  through hole drilling is one of the fundamental processes required.  in the  manufacture to produce  an electrical connection  . between the circuits  on the board. 

    Drilling is a particularly complicated machining process. and it becomes much more complicated when the workpiece is PCB. PCB is composite  materials  with  anisotropy. Tool trends to wear and break. The  accuracy  of  hole location,  the presence  of entry.  and exit  burrs,  smear  of  resin  on  the sides  of  holes,  delamination  and  so  on  may affect  quality  of  boards.  Only  a  small  one  of  these defects may cause  great  losses.


pcb material types

      When high performance is not an essential PCB characteristic. a material like lightweight polyester is a good choice. There are at least two reasons to select lightweight polyester under these circumstances. as long as it’s used in conjunction with printed electronics (PE) technology.
       The benefits of PE with lightweight polyester include:
Lower cost. Lightweight polyester creates less waste, requires fewer processing steps. and reduces need for water treatment and filtration.
Versatility. Flexible printed circuits (FPCs) are available. but it’s expensive to achieve the level of “bendability” that makes them so attractive. PE with lightweight polyester retains the flexibility at a much lower price.
But, traditional PCBs are still the first choice for high-performance applications. and the decision about which materials to use in their creation. should based on the kind of board required. For example, will the board:
Handle frequencies between 500MHz and 2GHz
Accommodate high power and, thus, high temperatures
Be complex and “dense?
Manage frequencies at the microwave level and above
        The board’s application determines, to a large extent. which materials to use in substrates and laminates.
       There are three major types of materials used for fabrication of PCBs:
This is the most used material in PCBs. It is a glass reinforced epoxy laminate sheet. The epoxy used is flame retardant and water resistant. It provides good strength to weight ratios. The tensile strength offered by this material is very high.
PTFE (Teflon)
PTFE is a kind of plastic material that does not provide any resistance. thus used for high speed, high frequency applications. PTFE is flexible, making it invaluable in applications with tight tolerances. It is also lightweight, allowing it to used across various industries. It is also flame resistant, exhibits high physical strength, provides temperature stability. and is versatile in application.
The traditional materials of copper, aluminum, iron, etc. are still used in PCBs. These materials allow the use of Surface Mount Technology (SMT). for the integration of components. They also provide mechanical durability. Thus, the product life of metal base PCBs is much longer.
The different materials used for the PCB design and fabrication. all offer a variety of advantages and disadvantages. The material chosen according to the application, the result needed. environmental factors, and any other constraints the PCB will face. You should choose the material of the PCB depending on the results that expected.

circuit board drill

entry board - pcb sheet material

        Entry Board for PCB drilling/ Phenolic Drill Entry Board material . constructed of layers of kraft papers impregnated with modified phenolic resin. It is the most cheap entry board material.
Entry Board is a composite of the Melamine paper and wooden fiber board with high density. It is especially made to replace the Phenolic backing board. 
Entry Board is difficult to distort.  The warping degree is smaller than the same size of Phenolic board.
Entry Board  reduces the abrasion of the drill and lengthens the life of micro drill bits. 
Entry Board  can save the cost and it has more sizes. 
Entry Board doesn’t pollute the environment.
       Drilling burr in PCB production is indispensable process. and it can't avoided for either electro-connection among layers or fixing elements. 
      The formation of pcb drilling burrs affects the PCB quality. and ends up in deburring processes. The burrs created from drilling processes is onerous to get rid of. and also the price of deburring is often large. 
      step-down of burr occurred in drilling method will scale back effort and time to get rid of burr. so the opening drilling and deburr method square measure. thought-about as necessary processes to save lots of energy. 
      Since burr formation associated with method conditions and drill pure mathematics. experiments were dole out to develop a Drilling Burr management Chart. by variable feed, spindle speed. and drill diameter and backup board material. 
       it tested that choose high density and hardness backup board . may be a sensible approaches to attenuate drilling burrs. and to green the PCB drilling method.

backup board for PCB - back up material

      Back Up Board is a paper-base laminate with low phenolic resin content for hard, flat surfaces. This material used in the printed circuit board industry. as a backup for the drilling operation. It is also used in other industries for tooling stock because of. its ease of machining and good dimensional stability.
      circuit board drill entry and backup board ,as a pcb board material . used for the PCB drilling process with high grade. and precise grade,Base material with HDF board ( high density wood fiber )of pine tree,willow tree. eucalyptus tree and poplar tree et. Top laminate with white melamine paper phenolic resin.
       the inner layers of this backup material: high density fibre board . available two density option as 830kg/m3 and 880kg/m3.

backup material feature

TAGS:  xray drill. laser drilling. pcb assembly. pcb fabrication. copper foil. . aspect ratio. inner layer. copper layers. pcb design.copper clad. layer pads. aluminium entry. entry foil. laser drills.  leaded components.   dc motor. electronic components. laser beam. .
its features
1. Circuit board drill backup board Have a certain surface hardness (reach to 80+-2 shore). to ensure that the machine drills bit removal chip  to keep the drill holes wall clear. and reduce the drilling burr, but not too hard and wear the drill bit to protect the pcb driller.
2. drilling printed base material made of wood fibre. which has no resin composition, and this drill bed. does not produce the melting resin ball adhering to the holes wall. when high speed mechanical drilling.
3. this printed circuit exit material has certain heat conduction function. which takes away the  heat generated during board drilling. reduces the high temperature of the drill bit during speed drilling. and prevents annealing of the drill bit.
4. Ideal exit material for high precision pcb manufacturing. Material uniformity, less impurities, no metal impurities. in line with ROHS standards.
5. Thickness tolerance of this product controlled within (+0.15mm) to . avoid frequent change of drilling machine bit height during pcb panels drilling.
6. pcb hole size can within 0.3mm.The performances of drilling holes are. higher than those of non-professional rotary perforated wood fiberboard. medium density PN wood fiberboard. high density PS wood fiberboard and resin wood fiberboard. which are close to phenolic pcb board. drill size. drill diameter can less than 0.3mm
7.pcb board custom service  such as drills registration holes,cut to size also provide for back drill pcb.

pcb sheet material factory - yueshan

       Yueshan is one of Yueshan most experienced custom PCB entry board. and backuo board service supplier. With the idea that our success measured by our clients' success. we focus on the care and attention to detail that each PCB manufacturing step requires. We also offer vacuum packaging, weighing. and delivery to make sure your PCB entry baord and back up board order arrives. and free of damage. Up to now, we have entry baord and back up boardof all sizes from over 80 countries. and we aim to deliver our manufactured entry baord. and back up boardto every corner of this world in the coming years.
      We specialize in providing PCB entry baord and back up board for our PCB customers. 

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