摘要:
A capacitor having a high dielectric constant and method of making the same is disclosed. The capacitor comprises a bottom electrode comprising a conductive oxide deposited upon a substrate by chemical vapor deposition. A dielectric layer having a high dielectric constant is deposited upon the conductive oxide. Lastly, a counter electrode is formed upon the dielectric layer.
摘要:
A method and apparatus for monitoring and controlling reactant vapors prior to chemical vapor deposition (CVD). The reactant vapors are monitored at full concentration without sampling as they are transported to a CVD reactor. Contaminants detected cause a process controller to switch the transport path to direct reactant vapors to a system pump.
摘要:
A process and apparatus for Al.sub.2 O.sub.3 CVD on silicon wafers using aluminum tri-isopropoxide in a high-volume production environment is presented. The conditions required to use ATI in a production environment and provide maximum utilization of ATI are first of all delivery of ATI via direct evaporation. The ATI source bottle is pumped out (bypassing substrates) until propene and isopropanol signals are reduced to 1% of process pressure before start of aluminum oxide deposition. Either IR spectroscopy or mass spectrometry can be used to provide a control signal to the microprocessor controller. Heating the supplied tetramer to 120.degree. C. for two hours assures complete conversion to trimer. The ATI is stored at 90.degree. C. to minimize decomposition during idle periods and allow recovery of trimer upon return to 120.degree. C. for two hours. During periods of demand, the ATI is held at 120.degree. C. to minimize decomposition.
摘要:
Anhydrous ammonium fluoride is used as a safe source of hydrogen fluoride for etching native or other silicon dioxide layers from silicon substrates. Heating the anhydrous ammonium fluoride above its sublimation temperature results in the generation of hydrogen fluoride gas which etches the silicon dioxide. Controlled amounts of water vapor are used during the etch reaction to ensure complete etching of the thin oxide layers down to within hundredths of a monolayer and to achieve precise etch rate control.
摘要:
An injector with a convex wall surface facing the susceptor directs vapor toward a wafer held by a susceptor producing a generally laminar flow across the surface of the wafer that in combination with the convex wall surface prevents formation of recirculation cells in the region between the wafer and the injector.
摘要:
An apparatus for processing a layer on a workpiece includes a source of reactant fluid, a reaction chamber having a support for the workpiece and a fluid delivery apparatus for feeding an input fluid into the reaction chamber with the input fluid being utilized to process the material. An infrared sensor is adapted to cooperate with the fluid delivery apparatus for sensing the concentration of a component of the input fluid. The infrared sensor includes an infrared light source positioned to direct a beam of infrared light at an infrared light detector through the input fluid. The infrared light detector produces an electrical output signal indicative of the amount of light received by the detector and therefore not absorbed by the input fluid.
摘要:
An apparatus for processing a layer on a workpiece includes a source of reactant fluid, a reaction chamber having a support for the workpiece and a fluid delivery apparatus for feeding an input fluid into the reaction chamber with the input fluid being utilized to process the material. An infrared sensor is adapted to cooperate with the fluid delivery apparatus for sensing the concentration of a component of the input fluid. The infrared sensor includes an infrared light source positioned to direct a beam of infrared light at an infrared light detector through the input fluid. The infrared light detector produces an electrical output signal indicative of the amount of light received by the detector and therefore not absorbed by the input fluid.
摘要:
The stresses commonly induced in the dielectrics of integrated circuits manufactured using metal patterning methods, such as reactive ion etching (RIE) and damascene techniques, can be reduced by rounding the lower corners associated with the features which are formed as part of the integrated circuit (e.g., the interconnects) before applying the outer (i.e., passivation) layer. In connection with the formation of metal lines patterned by a metal RIE process, such corner rounding can be achieved using a two-step metal etching process including a first step which produces a vertical sidewall and a second step which tapers lower portions of the vertical sidewall or which produces a tapered spacer along the lower portions of the vertical sidewall. This results in a rounded bottom corner which improves the step coverage of the overlying dielectric, in turn eliminating the potential for cracks. For metal lines patterned by damascene, such corner rounding can be achieved using a two-step trench etching process including a first step which produces a vertical sidewall, and a second step which produces a tapered sidewall along lower portions of the vertical sidewall.
摘要:
A method of forming a semiconductor structure may include forming a semiconductor substrate having an array region and a support region, forming a semiconductor substrate and a gate stack over the support region of the substrate and applying a critical mask over the support region and the array region. The critical mask may have a first opening at an area corresponding to the array region and a second opening at an area corresponding to the support region. Contact holes may be formed in a glass layer at areas corresponding to the first and second opening. After removing the critical mask, a first blockout mask may be applied over the array region and a first conductive type dopant may be added to exposed polysilicon corresponding to openings of the blockout mask or gate contacts may be formed.
摘要:
The stresses commonly induced in the dielectrics of integrated circuits manufactured using metal patterning methods, such as reactive ion etching (RIE) and damascene techniques, can be reduced by rounding the lower corners associated with the features which are formed as part of the integrated circuit (e.g., the interconnects) before applying the outer (i.e., passivation) layer. In connection with the formation of metal lines patterned by a metal RIE process, such corner rounding can be achieved using a two-step metal etching process including a first step which produces a vertical sidewall and a second step which tapers lower portions of the vertical sidewall or which produces a tapered spacer along the lower portions of the vertical sidewall. This results in a rounded bottom corner which improves the step coverage of the overlying dielectric, in turn eliminating the potential for cracks. For metal lines patterned by damascene, such corner rounding can be achieved using a two-step trench etching process including a first step which produces a vertical sidewall, and a second step which produces a tapered sidewall along lower portions of the vertical sidewall.