Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Thu, 18 Jun 1998 09:18:07 +1000 |
Content-Type: | text/plain |
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Eden ,
if you have camelot you can have a dual needle with preset foot relating
you the exact separating height ;
the placement force does not apply as far as I know .
Picture basically two needles with a touch foot beside in calibrated
offset .
As you take off sideways , after dual dispense , you can not string into
each pad .
Contact Shaafi : [log in to unmask]
he knows better than most , and can provide you with an actual custom
solution . He would recommend you volume dispensed as well .
They have a special kit for measuring the volume as well .
See you
Paul Klasek
http://www.resmed.com
> ----------
> From: by Dr. Eden Chen
> XianSong[SMTP:[log in to unmask]]
> Sent: Monday, 15 June 1998 13:35
> To: [log in to unmask]
> Subject: [TN] Conductive Epoxy for Solder termination
>
> Dear Sir,
>
> Some silver-filled conductive epoxies in the market claim to be
> solder
> replacement, but successful use of these material require a very
> good
> understanding of the epoxies properties, the process and CTE
> mismatch.
>
> The epoxy can be deposited to the pad by stencil printing or
> dispensing,
>
> Dispensing process has the tailing problem which can cause short
> for
> 0402 chip resistor/capacitor. It is very difficult to form the
> fillet
> for epoxy, because the epoxy may have a gap between the side of
> chip
> resistor/capacitor and dot peak of epoxy. How much should the
> placement force be applied and how big should the dot size for
> 0402
> resistor/capacitor?
>
> I like to discuss the above-mentioned issue in the TECHNET
>
> Eden
>
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