Jack Hwang

A 65nm logic technology featuring 35nm gate lengths, enhanced channel strain, 8 Cu interconnect layers, low-k ILD and 0.57 /spl mu/m/sup 2/ SRAM cell

A 65nm generation logic technology with 1.2nm physical gate oxide, 35nm gate length, enhanced channel strain, NiSi, 8 layers of Cu interconnect, and low-k ILD for dense high performance logic is presented. Transistor gate length is scaled down to 35nm while not scaling the gate oxide as a means to improve performance and reduce power. Increased NMOS and PMOS drive currents are achieved by enhanced channel strain and junction engineering. 193nm lithography along with APSM mask technology is used on critical layers to provide aggressive design rules and a 6-T SRAM cell size of 0.57/spl mu/m/sup 2/. Process yield, performance and reliability are demonstrated on a 70 Mbit SRAM test vehicle with >0.5 billion transistors.

Modeling of ultrahighly doped shallow junctions for aggressively scaled CMOS

This paper presents an integrated modeling approach to address diffusion and activation challenges in sub-90 nm CMOS technology. Co-implants of F and Ge are shown to reduce diffusion rates and a new model for the interactive effects is presented. Complex codiffusion behavior of As and P is presented and modeling concepts elucidated. Tradeoffs such as sheet resistance for a given junction depth, and how these depend on impurities, as well as soak vs. spike rapid thermal anneals (RTA), can be understood with simulation models.

Physical Modeling of Layout-Dependent Transistor Performance

Design for Manufacturability (DFM) is a phrase that often accompanies discussion of layout optimization for lithography process effects, particularly Optical Proximity Correction (OPC). In an environment where process technology and circuit design are developed together, many other process-layout co-optimization strategies can be investigated. In this paper we discuss physical modeling to enable co-optimization strategies from a device performance point of view by examining layout-induced variation in front-end manufacturing processes used to engineer transistor strain and dopant diffusion/activation.