FreeCalypso > hg > freecalypso-reveng
view pirelli/pcb @ 54:8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Sun, 28 Jul 2013 21:38:07 +0000 |
parents | b0f7481efc8b |
children |
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The Pirelli DP-L10 PCB appears to have 8 layers. Following the good old DEC convention, I shall refer to them as L1 through L8. Not knowing the original designers' intended identification, I have arbitrarily assigned L1 to be the battery/SIM side and L8 to be the display/keypad side. This numbering direction makes it easier to work with steve-m's grind-down pictures. Via structure: there don't seem to be too many all-the-way-through vias, if any at all, other than maybe the grounding ones around the edges of the board. Instead most/all internal vias are blind, spanning from L2 through L7. At both surfaces there are micro-vias (with many/most of them one can't even see the hole in steve-m's pictures, only a copper circle which one has to infer is an "annulus" for a micro-via), and these micro-vias only go one layer deep: from L1 to L2, and from L8 to L7.