Graham, John, Thanks for the comments.
I finally found the layer stackup document for the BBB (revB4). Strangely enough I could not find it in a readable format from: http://elinux.org/Beagleboard:BeagleBoneBlack#Hardware_Files I found it at the below page for an older BBB version: https://github.com/SweedJesus/Beaglebone-Black-Stuff/tree/master/Docs/Beaglebone%20Black/BBB_PCB/BeagleBone_Black_RevB4_MFG >From the beaglebone_black_RevB4_NOLOGO_FAB.pdf enclosed file looking at the different info I can see: - TOP and BOTTOM layers are: 1/2 oz + 150 microinches of plating (ie 0.150 mils) - INNER layers are: 1 oz which seems different from what is defined from the BBB Altium PCB stackup (beaglebone_black_RevB4.pcbDoc): - TOP and BOTTOM layers are: 2.4 mils - Inner layers are: 1.2 mils Using the below convert 1/2 oz should be 0.88 mils and 1 oz 1.37 mils: http://www.referencedesigner.com/cal/cal_02.php Am I missing something in the oz to mils conversion? Even if the Layer stack-up table from the .pdf file says that all dimension are in INCHES it looks like that the that it is oz and mils instead. In both document the total board height is 62 mils. AnBer On Wednesday, February 8, 2012 9:00:30 AM UTC+1, manatarms wrote: > > Dear All > > Does someone have the stackup of the BeagleBone PCB? I couldn't find > it on the hardware design page and it would help many people who want > to do their own design. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
BeagleBone_Black_RevB4_FAB.pdf
Description: Adobe PDF document
