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Mutilayer Printed Circuit Boards manufacturing

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Mutilayer Printed Circuit Boards manufacturing

Product Specification

Model No:	Multilayerpcb001

Country	CN

Product Detail

Multilayer PCB 
  
Multilayer PCB is a circuit board that has more than two layers. 
Unlike a Double-Sided PCB which only has two conductive layers of material, all multilayer PCBs must have at least three layers of conductive material which are buried in the center of the material. 
 <img src="http://i.bosscdn.com/product/49/2f/60/02d4d10b63e1bb8e998c6ea3d6.png@watermark=2&color=I0ZGRkZGRg%3D%3D&type=ZHJvaWRzYW5zZmFsbGJhY2s%3D&size=17&p=9&t=80&text=cGNiYXNzZW1ibHljaGluYS5ib3NzZ29vLmNvbQ%3D%3D" title="automotiveoemmanufacturing" alt="automotiveoemmanufacturing" /> 
How Are Multilayer PCBs Made? 
Alternating layers of prepeg and core materials are laminated together under high temperature and pressure to produce Multilayer PCBs. This process ensures that air isn't trapped between layers, conductors are completely encapsulated by resin, and the adhesive that holds the layers together are properly melted and cured. The range of material combinations is extensive from basic epoxy glass to exotic ceramic or Teflon materials.  
 
The figure above  illustrates the stackup of a 4-Layer/ multilayer PCB.  Prepeg and core are essentially the same material, but prepeg is not fully cured, making it more malleable than the core.The alternating layers are then placed into a lamination press. Extremely high temperatures and pressures are applied to the stackup, causing the prepeg to "melt" and join the layers together. After cooling off, the end result is a very hard and solid multilayer board.  
  
Benefits of Multilayer PCBs (compared to single or double-sided PCBs) 
• Higher assembly density  
• Smaller size (considerable savings on space) 
• Increased flexibility 
• Easier incorporation controlled impedance features. 
• EMI shielding through careful placement of power and ground layers. 
• Reduces the need for interconnection wiring harnesses (reduces overall weight) 
  
Applications of Multilayer PCBs 
While the weight and space benefits of multilayer PCBs are especially valuable forAerospace PCBs, multilayer PCBs are also beneficial to applications where "cross-talk" levels are critical. These are a few other the applications using multilayer printed circuit boards: 
• Computers 
• File servers 
• Data storage 
• Signal transmission 
• Cell phone transmission 
• Cell phone repeaters 
• GPS technology 
• Industrial controls 
• Satellite systems 
• Hand held devices 
• Test equipment 
• X-ray equipment 
• Heart monitors 
• Cat scan technology 
• Atomic accelerators 
• Central fire alarm systems 
• Fiber optic receptors 
• Nuclear detection systems 
• Space probe equipment 
• Weather analysis 
 
 
 pcbassemblycn.com

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