Mary,

I have done a composite footprint before and the only thing to be aware of
is that there will have to be two different solderpaste stencils to
accommodate the two different parts when getting assembled.  The assembly
house will have to know beforehand which is being used and have the
appropriate stencil on hand.  This could be a cost adder.  Always check
with your assembly house and fab house any time you wish to design
something out of the ordinary and to avoid any potential gotchas.

Hope this helps.

Regards,

Bill Gebhardt, C.I.D.
Electrical Engineer/PCB Designer
Overland Data, Inc.
San Diego, CA






                    Mary Knouse
                    <maryk@SYMCOMIN        To:     [log in to unmask]
                    C.COM>                 cc:
                    Sent by:               Subject:     [DC] surface mount pads
                    DesignerCouncil
                    <DesignerCounci
                    [log in to unmask]>


                    07/17/2001
                    08:46 AM
                    Please respond
                    to
                    "DesignerCounci
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                    Forum."; Please
                    respond to Mary
                    Knouse






I am designing a surface mount board and we want to be able to place a 1/4
watt(1210) or a 1/2 watt(2010) part on the same pads, so I am placing both
pads on the board (one over the other). I am wondering if there will be any
problems when we place them with the machine.
Any information would be appreciated on this.
Thanks,
Mary Knouse
PCB Designer
SymCom, Inc.

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