Preferences File Source

The new features have been given to us by Honeywell, Intel, Google, Amazon, Microsoft, Freedom CAD and many other customers and presented to the IPC 1-13 Land Pattern committee. 

These are solid, proven Preferences that are being used by over 100,000 companies in 103 different countries. There have been millions of library parts created worldwide and 100's of thousands of PC boards fabricated and assembled with very high quality results. 

The main key to the V2019 Preferences is that they are more in line with IPC-J-STD-001 Assembly acceptance rules and secondarily the unknown release date of IPC-7351C. 

I've been on the 1-13 Land Pattern committee since 1999 and I am the major contributor to that standard. I've attended every meeting for the past 20 years except recently the sub-committee is reviewing material that I provided. 

I know that the pad shapes are defined in the preferences. I'm just seeing that the IPC7351B default preferences use rounded rectangles, but the IPC7351C default preferences use regular rectangles. Is there a rationale for this change?

I think you've reversed what I'm saying. There are two files, IPC-7351B_DefaultPreferences.dat and IPC-7351C_DefaultPreferences.dat

IPC-7351C_DefaultPreferences.dat (newer) uses rectangles for most pads

IPC-7351B_DefaultPreferences.dat (older) uses rounded rectangles for most pads

This is the exact opposite of what I would expect given what you're saying.

Best regards,

John