Basic Factors in PCB Design
Various key factors have to be kept in mind while designing a PCB for a quality design. An important principle of PCB design, which becomes more critical in mixed signal design in order to avoid noisy signals and abnormal functioning is keeping analogue and digital grounds separated. Since in auto-routing the computer recognizes it as a single ground and routes accordingly, grounds are to be routed manually to avoid it. In addition to this:
For each digital IC, capacitors should be placed between its input power and ground
High frequency tracks should be kept short
Signals with high frequency should have a ground plane below them; they shouldn’t be run over gaps
Analogue circuits and digitals circuits should be kept separated
Analogue ground and digital grounds should be kept separated but connected to a common point
90o bends in tracks should be avoided, instead 45o bends can be used to avoid noise and signal reflections.
Power and ground tracks should be wide so that they have a higher current limit, also they should be placed first
Auto-routing should be avoided when possible
There shouldn’t be any copper fills unconnected on a PCB. They can be grounded to act as a heat sink or removed.
Vias shouldn’t be placed under the components
Through hole components ca be used as vias since the hole is connected to layers underneath
Drill size for holes and vias should be kept minimum
SMT Reflow Oven, Lead free Reflow Oven, Nitrogen SMT Reflow Oven, Reflow Oven Manufacturer, LED Reflow Oven, Dual Rail Reflow Oven, China Reflow Oven, Wave Soldering Machine, Dual Rail Wave Soldering Machine,Nitrogen Wave Soldering Machine, Wave Soldering Machine Manufacturer.
|FLASON provide a full SMT assembly line solutions, including
SMT Reflow Oven Manufacturer,
Wave Soldering Machine,
Pick and Place Machine,
SMT Stencil Printer,
SMT Inspection Machine,
SMT Reflow Oven,
SMT Peripheral Equipment,
SMT Assembly line,
SMT Spare Parts
etc any kind SMT machines you may need, please contact us for more information:
wechat whatsapp:+8613691605420, Skype: flasonsmt, Email: [email protected]
1) This is the first time I use this kind of machine, is it easy to operate?
There is English manual or guide video that show you how to use machine.
If you still have any question, please contact us by e-mail / skype/ phone /trademanager online service.
2) If machine have any problem after I receive it, how can I do ?
Free parts send to you in machine warranty period.
If the part is less than 0.5KG, we pay the postage.
If it exceeds 0.5KG, you need to pay the postage.
3) MOQ ?
1 set machine, mixed order is also welcomed.
4) How can I buy this machine from you? ( Very easy and flexible !)
A. Consult us about this product on line or by e-mail.
B. Negotiate and confirm the final price , shipping , payment methods and other terms.
C. Send you the proforma invoice and confirm your order.
D. Make the payment according to the method put on proforma invoice.
E. We prepare for your order in terms of the proforma invoice after confirming your full payment.
And 100% quality check before shipping.
F.Send your order by air or by sea.
5)Why choose us ?
A. Gold supplier on Alibaba !
B. Trade assurance to US$54,000 !
C. Best price !; Best shipping !; Best service !