Abstract:
The present invention, in one embodiment, provides a method of forming a semiconductor device that includes providing a substrate including a first conductivity type region and a second conductivity type region; forming a gate stack including a gate dielectric atop the first conductivity type region and the second conductivity type region of the substrate and a first metal gate conductor overlying the high-k gate dielectric; removing a portion of the first metal gate conductor that is present in the first conductivity type region to expose the gate dielectric present in the first conductivity type region; applying a nitrogen based plasma to the substrate, wherein the nitrogen based plasma nitrides the gate dielectric that is present in the first conductivity type region and nitrides the first metal gate conductor that is present in the second conductivity type region; and forming a second metal gate conductor overlying at least the gate dielectric that is present in the first conductivity type region.
Abstract:
PROBLEM TO BE SOLVED: To provide a gate structure for improvement in device performance in a metal oxide film semiconductor field-effect transistor. SOLUTION: A method of forming a semiconductor device is provided that includes forming a Ge-containing layer atop p-type device regions of the substrate. Thereafter, a first dielectric layer is formed in a second portion of a substrate, and a second dielectric layer is formed overlying the first dielectric layer in the second portion of the substrate and overlying a first portion of the substrate. Gate structures may then be formed atop the p-type device regions and n-type device regions of the substrate, and the gate structures to the n-type device regions include a rare-earth metal. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
The present invention relates to semiconductor-on-insulator (SOI) substrates having device regions (2, 4, 6), each comprises a base semiconductor substrate layer (12) and a semiconductor device layer (16) and a buried insulator layer (14) between. The semiconductor device layer (16) supported by vertical insulating pillars (22), each having a ledge extending between the base semiconductor substrate layer (12) and the semiconductor device layer (16). The SOI substrates of the present invention can be readily formed from a precursor substrate structure with a "floating" semiconductor device layer that is spaced apart from the base semiconductor substrate layer by an air gap (15) and is supported by the vertical insulating pillars (22). The air gap (15) is preferably formed by selective removal of a sacrificial layer (13) located between the base semiconductor substrate layer (12) and the semiconductor device layer (16).
Abstract:
Eine Struktur beinhaltet ein Substrat; einen Transistor, der über dem Substrat angeordnet ist, wobei der Transistor eine Finne aufweist, die aus Silicium besteht, das mit Kohlenstoff implantiert ist; und eine Schicht eines Gate-Dielektrikums und eine Schicht eines Gate-Metalls, die über einem Abschnitt der Finne liegen, der einen Kanal des Transistors definiert. In der Struktur wird eine Kohlenstoffkonzentration innerhalb der Finne so gewählt, dass eine gewünschte Schwellenspannung des Transistors erreicht wird. Darüber hinaus werden Verfahren zum Fertigen eines FinFET-Transistors offenbart. Zudem wird ein planarer Transistor mit einer mit Kohlenstoff implantierten Wanne offenbart, wobei die Kohlenstoffkonzentration innerhalb der Wanne so gewählt wird, dass eine gewünschte Schwellenspannung des Transistors erreicht wird.
Abstract:
Multiple types of gate stacks are formed on a doped semiconductor well. A high dielectric constant (high-k) gate dielectric is formed on the doped semiconductor well. A metal gate layer is formed in one device area, while the high-k gate dielectric is exposed in other device areas. Threshold voltage adjustment oxide layers having different thicknesses are formed in the other device areas. A conductive gate material layer is then formed over the threshold voltage adjustment oxide layers. One type of field effect transistors includes a gate dielectric including a high-k gate dielectric portion. Other types of field effect transistors include a gate dielectric including a high-k gate dielectric portion and a first threshold voltage adjustment oxide portions having different thicknesses. Field effect transistors having different threshold voltages are provided by employing different gate dielectric stacks and doped semiconductor wells having the same dopant concentration.