Thursday, March 11, 2010

Overview of gate first/gate last technologies

At Semiconductor International: "Gate First, or Gate Last: Technologists Debate High-k"
As high-k rolls out beyond Intel Corp. to both mobile and high-performance applications, the industry now faces a divided landscape. Intel and Taiwan Semiconductor Manufacturing Co. Ltd. (TSMC, Hsinchu, Taiwan) — the largest MPU provider and pure-play foundry, respectively — are backing the replacement metal gate (RMG) or gate-last approach. Their competitors — Advanced Micro Devices Inc. (AMD, Sunnyvale, Calif.), GlobalFoundries Inc. (Sunnyvale, Calif.), IBM Corp. (Armonk, N.Y.), and other members of the Fishkill Alliance — are using the gate-first approach, at least for the 28 nm node. United Microelectronics Corp. (UMC, Hsinchu, Taiwan) said it will use a hybrid approach employing a gate-last method for the more-difficult PMOS transistor.

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