| Printed Circuits Industry Standards |
http://www.ipc.org/ |
| Free Gerber viewer and Cad/Cam program |
http://www.graphicode.com |
| Free Gerber viewer and Cad/Cam program |
http://www.pentalogix.com/viewmate.php |
| Calculators for trace widths&thickness, Impedance and much more |
http://www.ifigure.com |
| Equipment and Calculations Program for Controlled Impedance |
http://www.polarinstrument.com |
| “Autocad viewer” for files format: DXF, DWG, DNF, CSF |
http://www.edrawingsviewer.com |
| Impedance calculator |
http://emclab.mst.edu/pcbtlc2/index.html |
| Impedance calculator |
http://www.chemandy.com |
| Impedance calculator |
http://www.mantaro.com |
| More calculators |
http://www.ultracad.com |
| More calculators |
http://wcalc.sourceforge.net |
| Gerber Viewer |
http://www.mccad.com/FREE_GerberViewer.html |
| Gerber Viewer |
http://gerbv.gpleda.org/ |
| Gerber Viewer |
http://www.gerber-viewer.com/ |
| Gerber Viewer |
http://www.viewplot.com/ |
| Gerber Viewer |
http://circuitpeople.com/ |
| Gerber Viewer |
http://www.easylogix.de/products_detail.php?prog_id=1 |
| Industry News |
http://evertiq.com/ |
| More about Dielectric constant (Dk) |
http://www.taconic-add.com/pdf |
| More about Dissipation Factor (Df) |
http://en.wikipedia.org/wiki/Dissipation_factor |
| More about Coefficient of Thermal Expansion (CTE) |
http://www.pcbdesign007.com/pages/zone.cgi?a=71427 |
| What is a GERBER File? |
http://circuitpeople.com/Blog/WhatIsAGerberFile.aspx |
| ll about CIRCUITS |
http://www.allaboutcircuits.com/tools/ |