Abstract:
A semiconductor device is described. That semiconductor device comprises a high-k gate dielectric layer that is formed over a channel that is positioned within a substrate, and a metal gate electrode that is formed on the high-k gate dielectric layer. The high-k gate dielectric layer has off-state leakage characteristics that are superior to those of a silicon dioxide based gate dielectric, and on-state mobility characteristics that are superior to those of a high-k gate dielectric that comprises an isotropic material.
Abstract:
Complementary metal oxide semiconductor integrated circuits may be formed with NMOS and PMOS transistors having different gate dielectrics. The different gate dielectrics may be formed, for example, by a replacement process. The gate dielectrics may differ in material, thickness, or formation techniques, as a few examples.
Abstract:
A floating-body dynamic random access memory device may include a semiconductor body having a top surface and laterally opposite sidewalls formed on a substrate. A gate dielectric layer may be formed on the top surface of the semiconductor body and on the laterally opposite sidewalls of the semiconductor body. A gate electrode may be 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. The gate electrode may only partially deplete a region of the semiconductor body, and the partially depleted region may be used as a storage node for logic states.
Abstract:
A method for making a semiconductor device is described. That method comprises forming a high-k gate dielectric layer on a substrate, and forming a sacrificial layer on the high-k gate dielectric layer. After etching the sacrificial layer, first and second spacers are formed on opposite sides of the sacrificial layer. After removing the sacrificial layer to generate a trench that is positioned between the first and second spacers, a metal layer is formed on the high-k gate dielectric layer.
Abstract:
A method for making a semiconductor device is described. That method comprises forming an oxide layer on a substrate, and forming a high-k dielectric layer on the oxide layer. The oxide layer and the high-k dielectric layer are then annealed at a sufficient temperature for a sufficient time to generate a gate dielectric with a graded dielectric constant.
Abstract:
Complementary metal oxide semiconductor metal gate transistors may be formed by depositing a metal layer in trenches formerly inhabited by patterned gate structures. The patterned gate structures may have been formed of polysilicon in one embodiment. The trenches may be filled with metal by surface activating using a catalytic metal, followed by electroless deposition of a seed layer followed by superconformal filling bottom up.
Abstract:
A method for making a semiconductor device is described. That method comprises forming an oxide layer on a substrate, and forming a high-k dielectric layer on the oxide layer. The oxide layer and the high-k dielectric layer are then annealed at a sufficient temperature for a sufficient time to generate a gate dielectric with a graded dielectric constant.
Abstract:
Higher mobility transistors may be achieved by removing a dummy metal gate electrode as part of a replacement metal gate process and doping the exposed channel region after source and drains have already been formed. As a result, a retrograde doping profile may be achieved in some embodiments in the channel region which is not adversely affected by subsequent high temperature processing. For example, after already forming the source and drains and thereafter doping the channel, temperature regimes greater than 900° C. may be avoided.
Abstract:
A method for making a semiconductor device is described. That method comprises applying an atomic layer chemical vapor deposition process to form a high-k gate dielectric layer directly on a hydrophobic surface of a substrate. The atomic layer chemical vapor deposition process initiates growth of the high-k gate dielectric layer in less than about twenty growth cycles.
Abstract:
A method for making a semiconductor device is described. That method comprises forming a high-k gate dielectric layer on a substrate, forming a barrier layer on the high-k gate dielectric layer, and forming a fully silicided gate electrode on the barrier layer.