Suzan , Jim , Edward and Rick
Thank you for reply.
We are using the standard Buhler equipment and accuracy problems , as you
probably know , are tremendous: normally we are missing the center and the
angle , so even when we are not missing the whole via , the picture of via
is disturbed.I have to measure diameters to assure,that the via is cut in
the center before thickness measurements are taken.
If the microsection is taken from the panel itself , our rate of success is
1 of 4 .
I understand , that there is no "magic equipment " or shortcut, just
routine, slow and exact work
Providing usage of positioning pins , how many pieces per mould are
recommended and how many moulds per head ?
Edward
Edward Szpruch
Eltek , Manager of Process Engineering
P.O.Box 159 ; 49101 Petah Tikva Israel
Tel ++972 3 9395050 , Fax ++972 3 9309581
e-mail [log in to unmask]
> -----Original Message-----
> From: Maguire, James F [SMTP:[log in to unmask]]
> Sent: ד דצמבר 08 1999 23:34
> To: [log in to unmask]
> Subject: Re: [TN] microsectioning equipment for microvias
>
> We've used the tooling from Buehler Nelson-Zimmer system with success,
> bigest issue is vias (typically 75micrometer and smaller) where the actual
> location of the via in the pad can't be readily determined visually (which
> is necessary to align tooling). Were we can locate them the system works
> well. If we can't see the vias (or more properly a "dent" in the pad) we
> section at a slight angle to the via to via centerline and figure,
> covering a range of potential via positions and usually get 2-4 "good"
> cuts.
>
> We have also (in "one up" cases where setting up the tooling isn't
> justified) done the "grind till ya find it" technique which is tedious.
>
> Jim
>
> > ----------
> > From: [log in to unmask][SMTP:[log in to unmask]]
> > Reply To: TechNet E-Mail Forum.;[log in to unmask]
> > Sent: Wednesday, December 08, 1999 12:31 PM
> > To: [log in to unmask]
> > Subject: Re: [TN] microsectioning equipment for microvias
> >
> > We also use traditional methods - tedious - but can be done
> > Would not process 30 sections in one mount and 9 mounts in a head
> > like routine through hole production.
> >
> > Susan Mansilla
> > Technical Director
> > Robisan Lab
> >
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