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PCB Design Perfection Starts in the CAD Library – Part 11
0.5 mm Pitch BGA Routing Solution There is a reasonable solution for via fanout and a routing solution for the 0.5 mm pitch BGA but we need to think outside the box. The board thickness is an...
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PCB Design Perfection Starts in the CAD Library – Part 12
The 3-Tier PCB library concept was originally created by IEC (International Electromechanical Commission) in 1999 and introduced to IPC in 2000. The concept had to be created as a solution for high...
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PCB Design Perfection Starts in the CAD Library – Part 13
Mounting holes are on every PCB design, but there is very little documentation about this subject matter. A Google or Wikipedia search on “Mounting Holes” renders no solutions to the PCB designer....
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Do you use Imperial or Metric units for PCB design?
If the French would have won the French & Indian War against the British (the 7 Year War from 1754 to 1763) Imperial Units or the English measurement system would not exist in society today. Even...
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Inch to Metric Conversion Tables for PCB design
Here are some tips about Metric Speak that all PCB designers need to know. “Metric” is not a unit of measure. Metric is a term that describes a measurement system. You use either millimeters or microns...
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PCB Design Perfection Starts in the CAD Library – Part 15 QFN
The Quad Flat No-lead (QFN) component family, as seen in Figure 1, is one of the newest electronic packages to be introduced into PCB design. The QFN has pins on 4 edges of the bottom surface of the...
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PCB Design Perfection Starts in the CAD Library – Part 16
Drafting elements in a CAD library part are not “Standardized” for specific values or sizes but there are recommendations that are coming out in the IPC-2610 series that include schematics, PCB...
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PCB Design Perfection Starts in the CAD Library – Part 17
IPC introduced a new padstack naming convention in the IPC-7351B standard publication and it is used exclusively in the Mentor Graphics LP calculator. This article explains the breakdown of the new...
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PCB Design Perfection Starts in the CAD Library – Part 18
Periphery Solder Joint Goals When it comes to solder joint goals, we are familiar with the terms Toe, Heel and Side solder joint fillets, but IPC introduced the Periphery solder joint in the latest...
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PCB Design Perfection Starts in the CAD Library – Part 19
PCB Breakaway Panels As PCB part placements get denser, it’s necessary to add breakaway panels that add additional board material (edge rails) to accommodate the assembly process. Two parallel edges...
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