The book is organised in four parts@ with generous contributions covering: (i) process/TCAD technology; (ii) device modelling/characterisation and circuit simulation; (iii) reliability and testability; (iv) analog and digital circuit and system design. In modern low-power HF microelectronics@ the interaction needed between these parts to achieve the desired system performances means that frequently there will be an alliance and/or overlap among them. It is fundamental to high-yield successful manufacturing to relate in a quantitative manner the sensitivity of the electrical performance of the final devices and/or circuits to variations in structural parameters@ doping profiles@ layout@ thermal effects and design. Author Gerson A. S. Machado