Hi Alejandro

is there any trace of adhesive (epoxy) left on the board? What kind of epoxy
you have in your process? Is there one specific part number? I had
experience with specific parts having some type
of film, and cause adhesion problems.


Luis A Gallegos
Automation Senior Technician
SANMINA-SCI
Pleasant Prairie  WI
262 947-7700
e-mail: [log in to unmask]


> -----Original Message-----
> From: Becerra Alejandro [SMTP:[log in to unmask]]
> Sent: Wednesday, March 13, 2002 7:02 PM
> To:   [log in to unmask]
> Subject:      Re: [TN] Glue Dot Size (missing parts)
>
>
> We are having issues with 0603 components attached with glue (Glue printed
> with Pump printing)
> that are being fallen in the wave soldering equipment.
> The average dot size that we are having in these components is 0.025" and
> the average torque value is 1 N-cm.
> What could be possible causes for this issue?
>
> Regards,
>
> Alejandro Becerra
> Thomson multimedia Inc
>
>
>
>
> -----Original Message-----
> From: Krug, Dick [ <mailto:[log in to unmask]>]
> Sent: Wednesday, March 13, 2002 9:54 AM
> To: [log in to unmask]
> Subject: Re: [TN] Glue Dot Size
>
>
> We dispense glue using a positive displacement pump.
> Dot diameter for 0603's is nominally 20 mils.
> Dot diameter for 0805's is nominally 28 mils.
> Dick Krug
> Sypris Electronics
>
> -----Original Message-----
> From: Vinit Verma [ <mailto:[log in to unmask]>]
> Sent: Wednesday, March 13, 2002 7:19 AM
> To: [log in to unmask]
> Subject: [TN] Glue Dot Size
>
>
> Hi All,
>
> Has anyone ever worked with the Pump Printing Stencil for printing glue on
>
> pre-inserted PCBs?? This stencil is developed by DEK but I'm not too sure
> of
> how it works? Any experiences?
>
> Also would be too kind if somebody could tell me the glue size requirement
>
> for 0603 and 0805 components?
>
> Thanks in advance
>
> Regards
> Vinit Verma
>
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