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comparison pirelli/pcb @ 54:8e4dac492552

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another Pirelli PCB tracing session, focusing on the display subsystem
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 28 Jul 2013 21:38:07 +0000
parents b0f7481efc8b
children
comparison
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53:00dedefbdfd1 54:8e4dac492552
6 6
7 Via structure: there don't seem to be too many all-the-way-through vias, if 7 Via structure: there don't seem to be too many all-the-way-through vias, if
8 any at all, other than maybe the grounding ones around the edges of the board. 8 any at all, other than maybe the grounding ones around the edges of the board.
9 Instead most/all internal vias are blind, spanning from L2 through L7. 9 Instead most/all internal vias are blind, spanning from L2 through L7.
10 At both surfaces there are micro-vias (with many/most of them one can't even 10 At both surfaces there are micro-vias (with many/most of them one can't even
11 see the hope in steve-m's pictures, only a copper circle which one has to 11 see the hole in steve-m's pictures, only a copper circle which one has to
12 infer is an "annulus" for a micro-via), and these micro-vias only go one layer 12 infer is an "annulus" for a micro-via), and these micro-vias only go one layer
13 deep: from L1 to L2, and from L8 to L7. 13 deep: from L1 to L2, and from L8 to L7.