Bicmos uses all of the same steps as cmos.some additional masks are inserted at opportune points in the process of cmos.Bicmos process is suitable for analog and digital design.
The bicmos ia better tha pure cmos for rf design because :
1). bic has high gm than cmos
2). bicmos has less noise
3). the modeling of bicmos has good physical meaning than cmos and more easy to predict the device heavior.
But bicmos has the limitation to shorten the cahannel to uncrease the ft.
the ft of 035um bcmos is ~30ghz.