gEDA-user: good books about footprint and land patterns

[Jelle de Jong <jelledejong@xxxxxxxxxxxxx>]

Hello everybody,

What are good books that explain how to create good save footprints from
datasheet specs. I am searching for best practices, math rules and so forts.

I need to create save footprints for BGA's and other very small
components that probably go into reflow soldering. I would like to know
how to make footprints if only the dimensions of the part is know and no
recommended pad layout is provided there is also an difference between
layout when reflow and wave soldering. I would like to see more science
and less trial and error, because it takes to much time and money.

http://tinyurl.com/pp8xnv
http://tinyurl.com/octvzu

Thanks in advance,

Jelle



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