The bottom-up design methodology is based on (mainly) manual
construction of circuit building blocks at the transistor and
mask-layout level, all of which are subsequently merged
together to form the complete design hierarchy. Due to its
flexibility at lower level design issues such as transistor
size optimization and parasitics minimization, the bottom-up
methodology is better suited for the design of very dense,
high-performance digital modules as well as analog and
mixed-signal integrated circuits.
![[VLSI Design
Flow]](toc.gif)
Back to the main design flow diagram