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April 1999

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Subject:
From:
Justin Braime <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 19 Apr 1999 08:31:37 +1200
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Hi Bill,
If the pads are laid out properly you can wave-solder SMD parts quite
successfully without chip wave. If you can't wave-solder the parts 'side-on'
to the wave due to design constraints, try wave-soldering the board at
different angles to the wave. A generous immersion depth helps too - easier
if you have a custom made board carrier. By the way, you might want to try
soldering at 465 degF instead of 500, you'll have less of a risk of
component damage and less dross too!!!

Regards,

Justin Braime
Process Engineer - Compuspec Industries
15a Vestey Drive, Mt Wellington
Auckland, New Zealand
[log in to unmask]
Ph: +64-9-574 1982
Fax: +64-9-574 1970

-----Original Message-----
From: Kasprzak, Bill (esd) US <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Sunday, April 18, 1999 12:29 AM
Subject: [TN] : Wave soldering CWR06 parts


>Tech-Netters:
>
>Anyone out there wave soldering CWR06 tantalum caps? Our design group has
>populated some of the larger case sizes on the back side of some boards. I
>didn't like this for a couple of reasons.
>
>#1 - The large case size will produce problems with "shadowing" since I do
>not have a chip wave.
>#2 - I didn't think that tantalum caps would survive the 500 degree F
plunge
>into the wave.
>
>Any comments on wavesoldering these parts?
>
>Any and all responses are welcome.
>
>Thanks,
>Bill Kasprzak
>Moog Inc.
>
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