Wow!...What an awesome idea.  Not as fun as 3D paste inspection, but very
effective for shops that can't afford a Cadillac.

Thanks

Ryan Grant
Advanced Technology Engineer
MCMS
(208) 898-1145
[log in to unmask]


> -----Original Message-----
> From: Stephen Brown [SMTP:[log in to unmask]]
> Sent: Wednesday, April 18, 2001 9:51 AM
> To:   [log in to unmask]
> Subject:      Re: [TN] Paste Thickness
>
> There are different systems available on the market from the high end full
> 3D paste volume
> measuring systems such as GSI Lumonics, down to the oblique laser systems
> available from
> people like the Cyberoptics LSM systems.
> To save money I found the best method was to attach a DTI (Dial Test
> Indicator)on to the
> stationary part of a microscope which probed the focussing part. You then
> focus on the PCB
> surface, zero the DTI, then focus on the upper surface of the solder
> paste. Read the DTI and
> you have the paste height measurement. This method offered good
> repeatability when we
> performed an R & R study on it.
>
> I hope this is of use to you.
>
> Steve Brown.
>
>
> Rick Howieson wrote:
>
> > Can someone direct me to a unit for measuring paste thickness?
> > thanks,
> > Rick Howieson
> > http://www.deltagroupinc.com
> >
> >
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