The irreversible development of modern electronics has been increasingly pushing PCBs towards such demands as miniaturization, light weight, high speed, better functionality and reliability, and longer lifetime, which results in the popularity of multylayers pcbs.Combined by a type of semi-solid adhesive which is called "prepreg", two or more single and/or double-sided PCBs are stacked together to generate multilayer PCBs through reliable predefined mutual connection between them. There are three or more conductive layers in one multilayer PCB with two layers outside and one layer synthesized in the insulation board. With the increase of PCB complexities and densities, it's possible for some issues to take place such as noise, stray capacitance and cross talk when layer arrangement gets inefficient design.
Planning optimal multilayer stack-up is one of the most important elements in determining the Electromagnetic Compatibility (EMC) performance of a product. A well-designed layer stack-up can both minimize the radiation and can stop circuit from being interfered by external noise sources. Well-stacked PCB substrates can also reduce signal cross talk and impedance mismatch issues. However, an inferior stack-up may get EMI (Electromagnetic Interference) radiation rising, because reflections and ringing in the system as a result of impedance mismatch can dramatically lower products' performance and reliability. This article then focuses on layer stack up definition, its designing rules and essential considerations.
PCB SERVICES OFFERED
Here's just the products and services available from Feiya Electronics
PCB Type | Single-side pcb , Double side pcb , Multilayer pcb , Aluminum base PCB HDI board pcb , High Tg pcb and so on |
Base Material | XPC ,CEM-1 , CEM-3 , FR-1 , FR4 ,High TG FR4 ,Aluminium , Lead Free Materials (Rohs compliant ),High Frenquency Material and so on |
Layer No . | 1-18 Layers |
Surface Finish | HASL , HASL Lead Free , Immersion Gold ,Gold Plating , Gold Finger , Immersion Silver , Immersion Tin , OSP ,Peelable soldermask and carbon ink |
Silk Screening | In any color such as green ,white ,nlue ,red , black and so on |
Certificate | ISO9001,ISO14001,ISO-TS, UL,ROHS |
Testing | Electrical Testing , Controlled Impedance Testing , Flying Probe Test , X-Ray Inspection AOI Test |
Environment | Clean room environmen , Dust-free workshop |
Transportation | Fedex ,DHL,UPS and so on |
Files | Gerber ,Protel ,Autocad ,Powerpcb , Orcad ,etc |