On Thu, 2 Dec 2010 05:48:48 +1300, "RussellMc" said:
> Phil says:
>=20
> > I've got a batch of boards which are having pad-lift issues when parts
> > are removed and replaced. These are boards from Gold Phoenix; the board=
s
> > from Eurocircuits are fine (and seem to have a FAR better quality solde=
r
> > mask -- not as nice looking, but MUCH more resistant to heat -- and the=
y
> > don't tend to delaminate like the GP boards).
>=20
> This is an area where others will have more day to day expertise so if
> any
> real experts pop their heads up listen to them instead. That said ...:
>=20
> My comment is re the nature of the PCB, not re repairing it.
>=20
> Unless something very unusual was specified the PCB material should have
> been specified as FR4, and a reputable manufacturer should have used FR4
> regardless if there was no spec

I know he said "delaminate" but what I understood was not that the board
material itself was having problems, it was the copper pulling away from
the board. Both the Eurocircuits and Golf Phoenix boards could be fine
quality FR4 but the copper layer on the Gold Phoenix not attached as
well. I remember the 2-day boards from AP Circuits having copper like
that, it did not like any rework, and even before soldering you could
peel it off quite easily.

Friendly regards,

Bob

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