213Re: Own aduc7020 pcb design
- Nov 20, 2008--- In ADuC_ARM@yahoogroups.com, "martin_schoenegg" > We use to make
longer pads so we are able to use a solder iron to
> heat the pad beside the IC. Our group made several layouts (evensimple
> single sided) without mayor problems. All hand soldered with a
> solder iron, no hot air or such specials. A few hints:side.
> Please do not connect or solder the metal surface on the bottom
> The mass of tin in the hole will easyly overheat your IC.Hi,
> Don't make wires nor vias under the chip. The metal surface is
> internally connected to GND and may give a short cirquit.
> Colophonium in alcohol is your friend for such handmade things. Use
> enough of such solution or an other flux to prevent shorts
> Good luck
thanks for all tips!
Using plain solder iron (and some wick) also. The vias and wires
under the chip are GND so a short should not cause any problem.
Rechecked and remeasured everything, the only thing I can come up
with is that I've heated the ADuCs too much/long. The hole was never
filled with tin. I'm using 280 celcius on the iron - what temp are
you guys using?
I'm thinking of redoing the PCB using a bigger board with less
constraints. Just to see if I can get the processor to kick in.
Thanks / Peter
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