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April 2002

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From:
"Mark E. Schumacher" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 16 Apr 2002 09:13:53 -0400
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Steve,
What is jump scoring?

Mark



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                    TechNet              Subject:     Re: [TN] Depanelization - Cracked Chip Caps
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                    04/15/02 09:06
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Hey Earl,

I suppose that's fool-proof, but in reality, how many CM's have routers?
When I worked at a memory company, we did...all we did was SIMM's mostly,
but that was our market. At other CM's that I worked at, a router would be
a strange piece of equipment on the floor, and hard to justify.

Tab/route spec's with a "mouse bite" lessens the stress a bit, but again is
not fool-proof...and doesn't leave the smooth edge that people like
(without some extra sanding, or filing), and adds more cost to the fab (by
the linear inch for the route, and the extra holes for the mouse-bite,
compared to a straight-line score. Jump scoring is even better, makes the
individual board separate very easily, and still stay together during
assembly...not many have the machines to do that yet...boo-hoo!)

Is there not a scoring spec, and some design rules that can prevent
problems? I think there are...getting people to follow them is another
story however...

-Steve "exacto-knife" Gregory-


 Specify all the 1/3 or whatever but don't use cookey cutters on my MLB's
 no
 mater the materials or constructions. You get what you ask and it usually
 is
 cracked something. Specify routing after assembly.

 MoonMan

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