摘要:
An integrated circuit and a method of making a transistor thereof are provided. The method includes the steps of forming a first stack on the substrate and a second stack on substrate in spaced-apart relation to the first stack, where the first stack has a first layer and first and second spacers adjacent to the first layer and the second stack has a second layer and third and fourth spacers adjacent to the second layer. A gate dielectric layer is formed on the substrate between the first and second stacks and a first conductor layer is formed on the gate dielectric layer. A first source/drain region is formed beneath the first conductor layer and a second source/drain region is formed beneath the second conductor layer. The first and second layers are removed and a first contact is formed on the first source/drain region and a second contact is formed on the second source/drain region. The method integrates gate and source/drain region formation and provides for gate electrodes with work functions tailored for n-channel and p-channel devices.
摘要:
A transistor and a method of making the same are provided. The transistor includes a substrate that has an upper surface and a gate dielectric layer positioned on the substrate that has a first quantity of nitrogen therein. A gate electrode is positioned on the gate dielectric layer. First and second source/drain regions are positioned in the substrate and laterally separated to define a channel region beneath the gate dielectric layer. The gate dielectric layer may be composed of a high K material with a thin equivalent thickness of oxide, such as TiO.sub.2, Ta.sub.2 O.sub.5, CrO.sub.2 or SrO.sub.2. The nitrogen suppresses later oxide formation which may otherwise increase the equivalent thickness of oxide of the gate dielectric layer. Nitrogen may also be incorporated into the substrate and the gate electrode.
摘要:
A process for forming a semiconductor device using a conductive etch stop. The process includes the steps of fabricating a wafer structure up to a first level oxide deposition. A conductive etch stop is deposited over the first level oxide deposition, and selected portions of the conductive etch stop are removed. An inter-level oxide layer is deposited on the conductive etch stop, and selected portions of the inter-level oxide deposition are etched up to the conductive etch stop. The conductive etch stop may be either removed from the semiconductor or left as a conductor.
摘要:
A semiconductor wafer comprising a single crystalline lattice suitable for use in the manufacture of integrated circuits, namely computer chips and dies, wherein a diameter of the wafer is greater than approximately 150 millimeters and wherein the wafer includes a first hole extending through the wafer. The hole is adapted to facilitate handling of the wafer without directly contacting a surface of the wafer. The wafer preferably includes a primary flat and the first hole includes a flat side having a predetermined and known orientation with respect to the primary flat of the wafer. In one embodiment, the wafer further includes a guide hole formed near the first hole such that the center-points of the first hole and the guide hole are oriented with a predetermined and known orientation with respect to the primary flat of the wafer.
摘要:
An integrated circuit fabrication process is provided for forming a transistor having an ultra short channel length. First and second masks are formed upon a conductive gate layer, wherein the second mask has a second lateral dimension less than a first lateral dimension of the first mask. The second mask is used to pattern a gate conductor from the conductive gate layer such that the gate conductor has an ultra narrow lateral dimension. Lightly doped drain impurity areas are formed self-aligned to sidewall surfaces of the gate conductor. Spacers are formed laterally adjacent the sidewall surfaces of the gate conductor, and source and drain impurity areas are formed self-aligned to sidewall surfaces of the spacers.
摘要:
Fluorine bearing spacers on the sidewalls of gate electrodes of a semiconductor device are provided to suppress hot carrier injection in the semiconductor device. In accordance with one embodiment of the invention, a semiconductor device is formed by forming at least one gate electrode on a surface of a substrate and forming fluorine bearing spacers on the sidewalls of the gate electrode. The fluorine bearing spacers may, for example, be formed of an NF.sub.3 -doped glass material.
摘要:
The present invention relates to a process of forming a semiconductor device including forming a gallium and nitrogen bearing layer and forming at least one gate electrode over the gallium and nitrogen bearing barrier layer. The invention also includes a semiconductor device formed according to this process. In another embodiment, the invention includes a semiconductor device including a substrate, a gallium and nitrogen containing barrier layer disposed over the substrate, and at least one gate electrode disposed over the gallium and nitrogen bearing barrier layer.
摘要:
A semiconductor device fabrication process in which an oxynitride layer and a polysilicon layer are formed in the same reaction chamber is provided. In accordance with one embodiment of the invention, a semiconductor device is formed by forming, in a reaction chamber, an oxynitride layer on a surface of a substrate and forming, in the same reaction chamber, a polysilicon layer over the oxynitride layer. The oxynitride layer may be used to form a gate oxide and the polysilicon layer used to form a gate electrode.
摘要:
An integrated circuit fabrication process is provided for forming silicon dioxide in the vacancies of a gate dielectric comprising metal oxide. The gate dielectric has a relatively high dielectric constant to promote high capacitive coupling between two conductive layers separated by the gate dielectric. The gate dielectric may be used in, e.g., a MOS transistor device or an EEPROM memory cell. The silicon dioxide is formed within the gate dielectric by first incorporating silicon atoms within the gate dielectric using gas cluster ion beam implantation. Gas cluster ion beam implantation affords shallow implantation of the silicon atoms. The gate dielectric is then annealed in a diffusion furnace while being exposed to a steam- or oxygen-bearing ambient. As a result of being heated, Si atoms react with O atoms to form SiO.sub.2 which fills oxygen vacancies in the gate dielectric. Absent the oxygen vacancies, the gate dielectric is less likely to allow current to leak between the two conductive layers. The SiO.sub.2 serves to terminate dangling bonds within the gate dielectric so that hot carriers and foreign species are substantially inhibited from being trapped within the gate dielectric.
摘要:
An in situ process is provided for isolating semiconductor devices according to a LOCOS process. The invention contemplates performing field oxide growth, nitride layer removal, sacrificial oxide growth and removal, and gate oxide growth all within a single chamber without removing the wafers from the chamber during processing. The invention is believed to result in increased yields and process throughput by reducing the exposure of the wafers to outer-chamber contaminants, thermal stress, and transportation damage, as well as reducing inter-chamber transportation time. The invention also contemplates an in situ processing chamber adapted for performing field oxide growth, nitride layer removal, sacrificial oxide growth and removal, and gate oxide growth as part of a LOCOS isolation process. The in situ processing chamber is adapted for thermal oxidation and etching processes to implement the LOCOS isolation structure. A conventional oxidation furnace may be adapted to provide the in situ processing chamber by adapting the oxidation furnace to accept etchant gasses. Other conventional chambers or a specialized chamber may also be adapted according to the present invention for the in situ LOCOS process.