PCB Libraries Forum : BGA Environment on Footprint

BGA Environment on Footprint : Thanks for clarifying.

Mon, 25 Nov 2013 07:34:24 +0000

Author: jameshead
Subject: 1193
Posted: 25 Nov 2013 at 7:34am

Thanks for clarifying.

BGA Environment on Footprint : All Grid Array component...

Mon, 25 Nov 2013 07:30:56 +0000

Author: Tom H
Subject: 1193
Posted: 25 Nov 2013 at 7:30am

AllGrid Array component families only have 1-tier for Pad Size calculations.

Theother elements that change with 3-Tiers are –

· SilkscreenLine Width

· ReferenceDesignator Height

· LocalFiducial Size

· PlacementCourtyard Excess

However,if you want to change the Pad Size reduction percentage you have control ofthat in “Terminal > Settings > Size Adjustment” or you can permanentlychange it in User Preferences.

Gridarrays have a different preference structure. That’sbecause preference settings are dependent on the nominal ball (orterminal size). That is what determines the environment.

Sizesabove 0.50 are considered ‘Most’; else sizes greater than 0.25 are ‘Nominal’and anything smaller is ‘Least’.

Mask,Stencil and Courtyard settings are set directly in the preference table.

Thisenvironment will flow through to any other dependencies like assembly orsilkscreen outline mapping.

BGA Environment on Footprint : I was under the impression that...

Mon, 25 Nov 2013 07:25:15 +0000

Author: jameshead
Subject: 1193
Posted: 25 Nov 2013 at 7:25am

I was under the impression that there is no environment added to the end of the BGA footprints, as indicated on the downloadable PDF from this site, however the Build Footprint in FPX adds a "L" environment at the end.