# break pad under chip into a grid to control the resist and paste masks
for viarow in range (-2, 3):
for viacol in range (-2, 3):
if (viarow in (-2, 0, 2)) and (viacol in (-2, 0, 2)):
# copper sub-square with resist over vias
# break pad under chip into a grid to control the resist and paste masks
for viarow in range (-2, 3):
for viacol in range (-2, 3):
if (viarow in (-2, 0, 2)) and (viacol in (-2, 0, 2)):
# copper sub-square with resist over vias