Abstract:
A novel transistor structure and its method of fabrication. According to the present invention, the transistor includes an intrinsic silicon body having a first surface. A gate dielectric is formed on the first surface of the intrinsic silicon body. A gate electrode is formed on the gate dielectric wherein the gate electrode comprises a mid-gap work function film on the gate dielectric. A pair of source/drain regions are formed on opposite sides of the intrinsic silicon body.
Abstract:
A method for making a semiconductor device is described. That method comprises forming a polysilicon layer on a dielectric layer, which is formed on a substrate. The polysilicon layer is etched to generate a patterned polysilicon layer with an upper surface that is wider than its lower surface. The method may be applied, when using a replacement gate process to make transistors that have metal gate electrodes.
Abstract:
The present invention is a semiconductor device comprising a semiconductor body having a top surface and laterally opposite sidewalls formed on a substrate. A gate dielectric layer is formed on the top surface of the semiconductor body and on the laterally opposite sidewalls of the semiconductor body. A gate electrode is formed on the gate dielectric on the top surface of the semiconductor body and adjacent to the gate dielectric on the laterally opposite sidewalls of the semiconductor body.
Abstract:
The present invention is a semiconductor device comprising a semiconductor body having a top surface and laterally opposite sidewalls formed on a substrate. A gate dielectric layer is formed on the top surface of the semiconductor body and on the laterally opposite sidewalls of the semiconductor body. A gate electrode is formed on the gate dielectric on the top surface of the semiconductor body and adjacent to the gate dielectric on the laterally opposite sidewalls of the semiconductor body.
Abstract:
A method for making a semiconductor device is described. That method comprises forming a metal oxide layer on a substrate, converting at least part of the metal oxide layer to a metal layer; and oxidizing the metal layer to generate a metal oxide high-k gate dielectric layer.
Abstract:
A semiconductor device and a method for forming it are described. The semiconductor device comprises a metal NMOS gate electrode that is formed on a first part of a substrate, and a silicide PMOS gate electrode that is formed on a second part of the substrate.
Abstract:
A method for making a semiconductor device is described. That method comprises forming a hard mask and an etch stop layer on a patterned sacrificial gate electrode layer. After first and second spacers are formed on opposite sides of that patterned sacrificial layer, the patterned sacrificial layer is removed to generate a trench that is positioned between the first and second spacers. At least part of the trench is filled with a metal layer.
Abstract:
A method for making a semiconductor device is described. That method comprises forming a dielectric layer on a substrate, and forming a first metal layer on a first part of the dielectric layer, leaving a second part of the dielectric layer exposed. After a second metal layer is formed on both the first metal layer and the second part of the dielectric layer, a masking layer is formed on the second metal layer.
Abstract:
A method for making a semiconductor device is described. That method comprises forming a metal oxide layer on a substrate, converting at least part of the metal oxide layer to a metal layer; and oxidizing the metal layer to generate a metal oxide high-k gate dielectric layer.
Abstract:
A method of forming a dielectric layer suitable for use as the gate dielectric layer in a MOSFET includes nitridizing a thin silicon oxide film in a low power, direct plasma formed from nitrogen. A gas having a lower ionization energy than nitrogen, such as for example, helium, may be used in combination with nitrogen to produce a lower power plasma resulting in a steeper concentration curve for nitrogen in the silicon oxide film.