Yes!  Well, depends.

If you are putting ICs on boards for wave soldering then solder thieves are essential.  And don't forget orientation!  See figure 3-9 of IPC-SM-782A for an example.

There are also some who claim that a longer, thinner pad works better for caps / resistors in wave soldering, but I'm not sure I agree with that.  One of my customers used to use a modified pattern for resistors and capacitors, but recently changed to generic pads (same for wave and for reflow).  We have not noticed any significant difference in process yield.  But we didn't do any formal data collection on it so I am not making any big claims either way.

You may want to do an archive search for more info on using thieves / robbers.

Have a good weekend.

regards

Graham Collins
Process Engineer, Litton Systems Canada, Atlantic Facility
(902) 873-2000 ext 6215

>>> [log in to unmask] 08/10/01 09:48AM >>>
Hi,
Is there a difference in SMT pad/land size at the design stage if the PCB is
to be reflowed or wave soldered?
Cathy Killen
Training Instructor
[log in to unmask] <mailto:[log in to unmask]>
An Oasis of Training Excellence
*       028 38314305

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