better mouse bites

I'm using mouse bites to mount one PC board on another PC board.

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First pass on this little board, I centered the contact pads on the board edge and routed them in half.

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I found those to be a bit hard to solder and desolder. So on rev B, I moved the pad centers off the board by 10 mils. That's quite a bit better.

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I might try another 10 mils next time, and maybe make the drill (currently 60 mils) a little bigger, to get a shallower bite.

I've seen boards with basically just a stripe of copper on the edge.

Reply to
John Larkin
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Watch out for Lyme disease - so be sure to disinfect the mouse bits prior to use...

John ;-#)#

Reply to
John Robertson

All our mice go through a solvent wash.

Reply to
John Larkin

That does indeed solve the problem...

John ;-#)

Reply to
John Robertson

  • First impression is the PCB material is crappy: i have never seen laminations like that before, and so many...
Reply to
Robert Baer

We did something similar when a memory chip went obsolete... trouble was that after reflow soldering, there were 'dry joints' on some of the 'pads' to the main pcb. Hand soldering was not an option as we had to do thousands... In the end, bad joints had to be touched up. Could be we missed some and they would have ended up as early field failures......

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Reply to
TTman

It's a perfectly fine 4-layer board from Cirexx. It's fabbed as a panel array, and we break apart the little tiles after assembly. I think we'll arrange to test and glob-top them before break-apart too.

Gotta make a test fixture with pogos.

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John Larkin         Highland Technology, Inc 

lunatic fringe electronics
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Reply to
jlarkin

We'll hand solder these baby boards to the main boards. I don't want to re-reflow them. This is high price stuff, and there are only 10 connections, so it's no big deal.

The real motivation here is to not have to rework a blown GaN fet; just replace the baby board. The BGA fets are fragile, so need to be glob-topped, so are impossible to rework.

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John Larkin         Highland Technology, Inc 

lunatic fringe electronics
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Reply to
jlarkin

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