trace wrinkles

jd onymouse at garlic.com
Tue Jul 10 08:06:42 CDT 2007


Peter C. Wallace wrote:

[snip]

> 
> 300 C is way above the melting point of even RoHS compliant solder, if
> you temperature cycled a standard PCB to that temperature, "wrinkles"
> would be the least of your troubles...
> 
>

feh. You're right. That's the ambient temp just for that cabinet. With the clamp
sinking the heat etc., the temp was actually closer to 200, maybe 250 on a good
day. Only got above 300 when the exhaust fans stopped working, then the boards
would brown real nice and the traces would fall off.

==
jd
Major Premise: Sixty men can do a piece of work sixty times as quickly
        as one man.

Minor Premise: One man can dig a posthole in sixty seconds.

Conclusion: Sixty men can dig a posthole in one second.
                -- Ambrose Bierce, "The Devil's Dictionary"



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