Loan -
At one of my clients, we are assembling 3.2" x 6.0", 48-up (1.0" x 0.3"
boards), .031" thick. The ideal web thickness we use is .008" with upper and
lower V-groove alignment within .005". Components are very close to the
edge, and we use a single-reflow process. If we go above .010" web
thickness, we get either cracked components or cracked solder joints when we
break away the boards, and the boards are harder to separate. To date, well
over one million of this product has been produced.
Ed Valentine
Electronics Manufacturing Solutions
8612 Mourning Dove Road, Raleigh, NC 27615
Phone: (919) 270-5145, Fax: (919) 847-9971
Email: [log in to unmask]
Website: http://www.ems-consulting.com
----- Original Message -----
From: "Tempea, Ioan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, September 06, 2001 5:15 PM
Subject: [TN] V scoring of a 0.031" thick panel
> Hi Technet,
>
> I'm back with one more experience teaser.
>
> Is it possible to score a FR4 panel, 0.031" thick? The scoring guide on
the
> site of Accusystems only covers the regular, 0.062".
>
> If yes, any limitations?
>
> What is the reccomended web thickness, I am looking at a panel about
4"x9",
> double reflow, with the depanelizing right after the reflow.
>
> Thanks,
> Ioan
>
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