EEVblog Electronics Community Forum

Electronics => PCB/EDA/CAD => Eagle => Topic started by: gauravmp on May 24, 2016, 10:57:43 pm

Title: Trace widths/Via drill and dia
Post by: gauravmp on May 24, 2016, 10:57:43 pm

Hi,

I've worked on a number of pcbs before but I've always had ample space to play around with so I always kept good numbers on the trace widths and via drills and dias. However, now I'm confronted with designing a board for an FPGA and I was wondering if anyone knew of some golden rules or some guild lines to follow in deciding on a particular trace width or Via drills and dias.

Any help would be appreciated.

Thanks.
 

Title: Re: Trace widths/Via drill and dia
Post by: vzoole on May 25, 2016, 07:47:46 am

I always use the smallest standard parameters (if not necessary to use advanced technology). Standards mean the PCB manufacturer offer it without extra cost.

For example:
I order my PCBs from Eurocircuits and they offer Class 6 PCB without extra cost:
Eurocircuits classification table (http://www.eurocircuits.com/clientmedia/ecImage/pages/pcb-classification-pattern-class-and-drill-class/ec-classification-english-3-2013-v3-final.pdf)

So I normally use this parameters:
Minimum track width: 0.15mm
Minimum clearance: 0.15mm
Minimum PTH via size: hole-0.25mm, diameter-0.6mm
Minimum NPTH drill: 0.35mm

In your case we need mor information about your design. Mainly the package of FPGA.