full-custom

   Design of integrated circuits at the transistor or polygon
   level.  This is in contrast to the use of libraries of
   components.  Full-custom design requires considerable skill
   and experience and is usually only feasible for simple
   circuits, especially ones with much repetition, such as memory
   device, where a small saving in the size and power consumption
   of a component will yield a large overall saving.

   (1994-12-01)