•“Artwork” is used to define the size and shape of solder
connects for components
like capacitors, diodes, RF chips, etc.
•The dimensions of solder pads (where you actually
connect your circuit) are
specified on data sheets. They are also
available in the libra “library” for
many standard elements.
•The size of pads add length to your lines, so you will
need to include them in your
simulation for most accurate results. This means you need to figure out their size
before you simulate the
circuit, so you will do some back-and-forth between layout and simulation.