Combines the high speed of Bipolar transistors with the low power of CMOS.

Understanding the physical structure of a transistor is critical before attempting physical layout or design.

The book is famous for its "stick diagram" approach—a minimalist method to sketch layouts using colored lines (green for poly, red for metal, yellow for diffusion). If you search for the PDF, you are likely a student trying to:

[Gate (Polysilicon)] -------------------- ======= Oxide Layer ======= [Source (n+)] [Drain (n+)] --------------------------------- P-Type Substrate Layer