摘要:
Example embodiments provide triple-gate semiconductor devices isolated by reverse shallow trench isolation (STI) structures and methods for their manufacture. In an example process, stacked layers including a form layer over a dielectric layer can be formed over a semiconductor substrate. One or more trenches can be formed by etching through the stacked layers. The one or more trenches can be filled by an active area material to form one or more active areas, which can be isolated by remaining portions of the dielectric layer. Bodies of the active area material can be exposed by removing the form layer. One or more triple-gate devices can then be formed on the exposed active area material. The example triple-gate semiconductor devices can control the dimensions for the active areas and provide less isolation spacing between the active areas, which optimizes manufacturing efficiency and device integration quality.
摘要:
Semiconductor devices and fabrication methods are provided, in which metal transistor gates are provided for MOS transistors. Metal boride is formed above a gate dielectric to create PMOS gate structures and metal nitride is formed over a gate dielectric to provide NMOS gate structures. The metal portions of the gate structures are formed from an initial starting material that is either a metal boride or a metal nitride, after which the starting material is provided with boron or nitrogen in one of the PMOS and NMOS regions through implantation, diffusion, or other techniques, either before or after formation of the conductive upper material, and before or after gate patterning. The change in the boron or nitrogen content of the starting material provides adjustment of the material work function, thereby tuning the threshold voltage of the resulting PMOS or NMOS transistors.
摘要:
The present invention provides method of forming a gate dielectric that includes forming a metal source layer (210) comprising a metal and at least one nonmetallic element over a substrate (110). The metal source layer (210) is formed having a composition rich in the metal. A dielectric layer (310) comprising the metal is formed over the metal source layer (210).
摘要:
One or more aspects of the present invention relate to forming a transistor while passivating electrically active defects associated with a top portion of a layer of high-k dielectric material. The layer of high-k dielectric material is utilized to establish a high-k gate dielectric in the transistor. A gate electrode layer is formed over the layer of high-k dielectric material, and is patterned to form a gate structure that includes a gate electrode and the high-k gate dielectric. The electrically active defects are passivated utilizing materials containing dopants that are attracted to and neutralize the defects. The passivated defects thus do not interfere with other transistor doping processes (e.g., forming source and drain regions) and do not adversely affect resulting semiconductor device performance, reliability and yield.
摘要:
Methods and systems are disclosed that facilitate semiconductor fabrication by fabricating transistor devices having gate dielectrics with selectable thicknesses in different regions of semiconductor devices. The thicknesses correspond to operating voltages of the corresponding transistor devices. Furthermore, the present invention also provides systems and methods that can fabricate the gate dielectrics with high-k dielectric material, which allows a thicker gate dielectric than conventional silicon dioxide.
摘要:
Semiconductor devices and fabrication methods are provided, in which metal transistor replacement gates are provided for CMOS transistors. The process provides dual or differentiated work function capability (e.g., for PMOS and NMOS transistors) in CMOS processes.
摘要:
The present invention provides, in one embodiment, a method (100) of forming dual work function metal gate electrodes in a semiconductor device. The method includes forming a gate dielectric (105) over a substrate (110) and depositing a mold layer (115) having a first opening (120) therein over the gate dielectric (105). The method further includes creating a first metal gate electrode (125) by depositing a first metal in the first opening (120). Other embodiments include an active device (200) produced by the above-described method and method of manufacturing an integrated circuit (300) using the above-described method.
摘要:
Dual gate dielectric layers are formed on a semiconductor substrate for MOS transistor fabrication. A first dielectric layer (30) is formed on a semiconductor substrate (10). A first plasma nitridation process is performed on said first dielectric layer. The first dielectric layer (30) is removed in regions of the substrate and a second dielectric layer (50) is formed in these regions. A second plasma nitridation process is performed on the first dielectric layer and the second dielectric layer. MOS transistors (160, 170) are then fabricated using the dielectric layers (30, 50).
摘要:
The present invention facilitates semiconductor fabrication by maintaining shape and density of an etch stop layer (206) during trench fill operations. The shape and density of the etch stop layer (206) is maintained by forming a protective alloy liner layer (310) on the etch stop layer (206) prior to trench fill operations. The protective alloy liner (310) is comprised of an alloy that is resistant to materials employed in the trench fill operations. As a result, clipping and/or damage to the etch stop layer (206) is mitigated thereby facilitating a subsequent planarization process that employs the etch stop layer (206). Additionally, selection of thickness and composition (1706) of the formed protective alloy (310) yields a stress amount and type (1704) that is applied to channel regions of unformed transistor devices, ultimately providing for an improvement in channel mobility.
摘要:
Dual gate dielectric layers are formed on a semiconductor substrate for MOS transistor fabrication. A first dielectric layer (30) is formed on a semiconductor substrate (10). A first plasma nitridation process is performed on said first dielectric layer. The first dielectric layer (30) is removed in regions of the substrate and a second dielectric layer (50) is formed in these regions. A second plasma nitridation process is performed on the first dielectric layer and the second dielectric layer. MOS transistors (160, 170) are then fabricated using the dielectric layers (30, 50).