Hi,
I'm routing a PCB.
I'm trying to figure out if I can reduce the number of nails required by the fixture that my PCB manufacturer will have to build in order to test the bare boards.
FACTS
---------- The non recurring cost of PCB bare-board test fixtures depends on:
1) The size of the pads to test (the smaller the more expansive) 2) The number of the pads to testMy boards are 80% SMD and 20% TH
Question 1
---------------- I've been told that PCB makers put one nail every terminal node of a net. Is that true?
Question 2
---------------- Let's say we got a net which connects 5 SMT pads:
Routing option 1 The net is routed in a way that we have 5 end points
O------------------------------------- O | | | | | O O O
Routing option 2 The net is routed in a way that we have 2 end points
O----O--------O--------O------------- O
Routing option 1 requires 5 nails, is that true?
Routing option 2 requires 2 nails, is that true?
Routing option 2 is less expensive than option 1 because requires less nails, is that true?
thanks in advance for any hints, Enrico