GAA
Gate-all-around transistor architecture, in which silicon nanosheets are stacked horizontally so that the gate fully surrounds the channel on all sides. It significantly suppresses short-channel effects and is the dominant architecture following FinFET.
Timeline (last 90 days)
Stacking multiple channel layers in GAA can increase drive current, but thermal management and parasitic capacitance issues still need optimization.
Gate-all-around (GAA) forms the channel into extremely thin ribbons (nanosheets), with the gate completely wrapping around these ribbon channels and controlling them simultaneously from the top, bottom and both sides.
Short-channel effects must be solved by enhancing the gate's electrostatic control over the channel at the device structure level, which is the fundamental motivation for the emergence of FinFET and GAA.
GAA manufacturing involves complex steps such as atomic layer deposition, selective etching and three-dimensional integration, significantly increasing manufacturing difficulty.
GAA manufacturing requires selective etching in alternating layers of silicon germanium and silicon to release suspended silicon ribbons.
From planar to FinFET to GAA, the logic of transistor evolution has always been to bring the gate closer to the channel and wrap it more comprehensively, achieving less leakage through better control.
In GAA manufacturing, wafers must undergo thermal processes at about 1,000 degrees Celsius while avoiding damage to the actual gate materials.
The concept of gate-all-around (GAA) was already validated in the lab as early as 1988.
Samsung first brought GAA transistors into mass production in 2022.
TSMC's 2nm node (N2) is among the first commercial processes to adopt gate-all-around (GAA) transistor architecture, replacing the previous FinFET architecture.
4 more timeline events
All Facts (15)
芯片制程进入亚纳米时代（2nm及以下节点），晶体管结构已从FinFET演进到GAA（Gate-All-Around）纳米片架构
90%UnverifiedFrom planar to FinFET to GAA, the logic of transistor evolution has always been to bring the gate closer to the channel and wrap it more comprehensively, achieving less leakage through better control.
50%UnverifiedShort-channel effects must be solved by enhancing the gate's electrostatic control over the channel at the device structure level, which is the fundamental motivation for the emergence of FinFET and GAA.
50%UnverifiedGate-all-around (GAA) forms the channel into extremely thin ribbons (nanosheets), with the gate completely wrapping around these ribbon channels and controlling them simultaneously from the top, bottom and both sides.
50%UnverifiedGAA manufacturing requires selective etching in alternating layers of silicon germanium and silicon to release suspended silicon ribbons.
50%UnverifiedGAA manufacturing involves complex steps such as atomic layer deposition, selective etching and three-dimensional integration, significantly increasing manufacturing difficulty.
50%UnverifiedStacking multiple channel layers in GAA can increase drive current, but thermal management and parasitic capacitance issues still need optimization.
50%UnverifiedSamsung first brought GAA transistors into mass production in 2022.
50%UnverifiedIn GAA manufacturing, wafers must undergo thermal processes at about 1,000 degrees Celsius while avoiding damage to the actual gate materials.
50%UnverifiedThe concept of gate-all-around (GAA) was already validated in the lab as early as 1988.
50%UnverifiedTSMC's 2nm node (N2) is among the first commercial processes to adopt gate-all-around (GAA) transistor architecture, replacing the previous FinFET architecture.
50%UnverifiedSamsung was the first to mass-produce GAA process technology starting from the 3nm node.
50%UnverifiedNanosheet technology is a specific implementation of GAA that increases current drive capability by horizontally stacking multiple layers of thin silicon sheets.
50%UnverifiedAt the minuscule scale of the angstrom level, the traditional FinFET architecture is difficult to sustain, and the industry has broadly adopted GAA transistors to control leakage and improve performance.
50%UnverifiedIn GAA (Gate-All-Around) transistors, the gate fully surrounds the nanosheet or nanowire, achieving four-sided encapsulation, whereas in FinFET the gate wraps around the fin-shaped silicon structure on three sides.
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