Eric,

Wouldn't the temperature which your parts experience also be a function of
the thermal path of the device's leads - eg - thick robust copper leads
(TO-220 like) conducting more heat than thin small leads?

Steve Creswick

-----Original Message-----
From: Eric Christison [mailto:[log in to unmask]]
Sent: Wednesday, September 26, 2001 8:38 AM
To: [log in to unmask]
Subject: [TN] Wave soldering Questions


I've got a question on wave soldering.

We have a temperature sensitive component that we need to connect to a PCB.
We know the component won't survive reflow temperatures but we could
redesign the package so that it is suitable for wave soldering. The
temperature sensitive part of the device is several mm above the PCB.

What sort of temperature profile could one expect say 5mm above the PCB?

Is wave soldering a technique which is still in common use or would finding
a wavesoldering subcontractor or equipment be like looking for someone to
service my Model 'T' Ford?

Are there (or will there be) any issues about wave soldering with lead free
solder?

Regards,




Eric Christison
Mechanical Engineer
STMicrolectronics
33 Pinkhill
Edinburgh
EH12 7BF UK

Tel 44 (0) 131 336 6165
Fax 44 (0) 131 336 6001

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