kicad-developers team mailing list archive
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Re: Polygon work
Fri, 23 Jan 2009 21:50:18 +0100
Thunderbird 18.104.22.168 (Windows/20081209)
Dick Hollenbeck a écrit :
I am thinking (but i can be wrong) the main advantage of thermal reliefs
is to allow unsoldering defective components.
Mainly on multilayers (4 and more layers), without thermal reliefs,
unsoldering thought pins is very difficult
On my boards most all components are SMT with a handful of through hole
components. I asked my board manufacturer if they thought I needed
thermal reliefs and they said no. I guess thermal reliefs are only for
hand soldered components? If so, aren't hand soldered components
typically fairly large pads with fairly large pad to pad distances?
A wave machine or an SMT reflow process does not need thermal reliefs
according to my board manufacturer. Does this information help,
contradict, or confuse?
(and unfortunately also with thermal reliefs, but it is ab bit more easy)
Of course soldering (by hand) these components is, by the way, more
easy, so thermal reliefs are good but not mandatory.
SMD components do not have this problem.
So i am not surprising by your board manufacturer opinion.
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