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March 2002

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Subject:
From:
Luis Gallegos <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 15 Mar 2002 08:01:22 -0600
Content-Type:
text/plain
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text/plain (127 lines)
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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