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January 1998

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Subject:
From:
Ken Patel <[log in to unmask]>
Reply To:
TechNet Mail Forum.
Date:
Wed, 14 Jan 1998 17:10:54 -0800
Content-Type:
text/plain
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text/plain (61 lines)
For this big size component, only thing I can think about is a ALIGNMENT.
Make sure you stay on the line and watch few boards and fix some one and let
others go without fixing. Few more...

Also if possible make sure to orient the boards such that both terminations
enter at the same time in any zone meaning perpendicular to reflow direction.

Also make sure that oven is stabilized.

Also if not sure, make sure some one do the maintenance of the oven - may
heating element is dead, etc which might contribute to uneven heating.

If you want to play with the stencil then reduce the width of aperture
opening by 20%.

re,
ken patel

At 11:12 AM 1/14/98 EST, you wrote:
>     We have been experiencing problems with tombstoning of 1210 caps.  I
>     have not been able to find any information about parts this large
>     tombstoning.  Is there any way to fix this problem while we are
>     waiting for a design change to the pad layout?
>
>     Any help on this subject will be greatly appreciated.
>
>     Sean Gearin
>     [log in to unmask]
>
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______________________________________________________
Ken Patel                       Phone:  (408) 490-6804
575 Cottonwood Dr.              Fax:    (408) 490-6859
Milpitas, CA 95035              Beeper: (888) 769-1808

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