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Date: | Wed, 10 May 1995 17:15:13 -0500 |
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Gloria:
As a rule, we do not allow any meniscus to enter the hole. We purchase the
components pre-crimped which keepss it from getting in. If they are not
available pre-crimped or if our usage does not justify the minimum purchase
to get them pre-crimped, we crimp them by hand.
Is this excessive? What do other companies do?
At 12:46 PM 5/10/95 cst, [log in to unmask] wrote:
>
> We have a discussion going on with the IPC 610 B figure 4-23
> and 4-24 which are on page 57. It seems we cannot come up with
> a majority rule on the insertion and soldering techniques of
> the coated capacitor.
>
> The statement which we are concerned with: Exhibits all around
> good wetting on secondary side and lead coating meniscus is not
> visible within connection on solder side. We cannot understand why
> solder side is also called secondary side in the same sentence.
> (Per the view 4-2 these mean the same.)
>
> Our situation is, we have some meniscus into the solder on the top
> side or primary side with little or no wetting. We cannot ensure that
> the vertical fill of solder is 75% per table 4-1 Class 2.
> Also, there does not appear to be a minimum amount of lead space
> between the solder connection and the meniscus in 610 B.
> This application has been changed from 610 A TO 610 B.
>
> Thanks for any clarification we can get on this...
>
>
>
-Pat-
-------------
Patrick McGuine
[log in to unmask]
(608) 276-6334
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