摘要:
An insulated-gate field-effect transistor adapted to be used in an active-matrix liquid-crystal display. The channel length, or the distance between the source region and the drain region, is made larger than the length of the gate electrode taken in the longitudinal direction of the channel. Offset regions are formed in the channel region on the sides of the source and drain regions. No or very weak electric field is applied to these offset regions from the gate electrode.
摘要:
A thin-film semiconductor device or integrated circuit comprising an insulating substrate, TFTs (thin-film transistors) formed on the substrate, and multilayer conductive interconnections. The circuit has a first metallization layer becoming gate electrodes and gate interconnections. The surface of the first metallization layer is oxidized by anodic oxidation to form an insulating coating on the surface of the first metallization layer. A second metallization layer becoming source and drain electrodes or conductive interconnections is then formed on the insulating coating directly or via an interlayer insulator. An improvement in the production yield and improved reliability are accomplished.
摘要:
A process for fabricating a semiconductor by crystallizing a silicon film in a substantially amorphous state by annealing it at a temperature not higher than the crystallization temperature of amorphous silicon, and it comprises forming selectively, on the surface or under an amorphous silicon film, a coating, particles, clusters, and the like containing nickel, iron, cobalt, platinum or palladium either as a pure metal or a compound thereof such as a silicide, a salt, and the like, shaped into island-like portions, linear portions, stripes, or dots; and then annealing the resulting structure at a temperature lower than the crystallization temperature of an amorphous silicon by 20 to 150° C.
摘要:
A semiconductor device having an improved contact hole through an interlayer insulator. A first insulating film comprising silicon nitride is deposited. A second insulating film comprising silicon oxide is deposited on the first insulating film. The deposition condition of the second insulating film is varied during the deposition so that the etching rate of the second insulating film increases from a lower portion toward an upper portion. Thereby, a contact hole which is formed by etching through the first and second insulating films has a tapered configuration to improve a reliability of a connection made therein.
摘要:
Semiconductor devices such as thin-film transistors formed by annealing a substantially amorphous silicon film at a temperature either lower than normal crystallization temperature of amorphous silicon or lower than the glass transition point of the substrate so as to crystallize the silicon film. Islands, stripes, lines, or dots of nickel, iron, cobalt, or platinum, silicide, acetate, or nitrate of nickel, iron, cobalt, or platinum, film containing various salts, particles, or clusters containing at least one of nickel, iron, cobalt, and platinum are used as starting materials for crystallization. These materials are formed on or under the amorphous silicon film.
摘要:
An improved method for manufacturing an insulated gate field effect transistor is described. The method comprises the steps of forming a semiconductor film on an insulating substrate, forming a gate insulating film on said semiconductor film, forming a gate electrode on said gate insulating film with said gate insulating film inbetween, anoding said gate electrode in order to coat an external surface of said gate electrode with an oxide film thereof and applying a negative or positive voltage to said gate electrode with respect to said semiconductor film. Lattice defects and interfacial states caused by the application of a positive voltage during the anoding are effectively eliminated by the negative voltage application.
摘要:
Method of fabricating semiconductor devices such as thin-film transistors by annealing a substantially amorphous silicon film at a temperature either lower than normal crystallization temperature of amorphous silicon or lower than the glass transition point of the substrate so as to crystallize the silicon film. Islands, stripes, lines, or dots of nickel, iron cobalt, or platinum, silicide, acetate, or nitrate of nickel, iron, cobalt, or platinum, film containing various salts, particles, or clusters containing at least one of nickel, iron, cobalt, and platinum are used as starting materials for crystallization. These materials are formed on or under the amorphous silicon film.
摘要:
A process for fabricating a semiconductor by crystallizing a silicon film in a substantially amorphous state by annealing it at a temperature not higher than the crystallization temperature of amorphous silicon, and it comprises forming selectively, on the surface or under an amorphous silicon film, a coating, particles, clusters, and the like containing nickel, iron, cobalt, platinum or palladium either as a pure metal or a compound thereof such as a silicide, a salt, and the like, shaped into island-like portions, linear portions, stripes, or dots; and then annealing the resulting structure at a temperature lower than the crystallization temperature of an amorphous silicon by 20.degree. to 150.degree. C.
摘要:
A process for fabricating an electronic circuit by oxidizing the surroundings of a metallic interconnection such as of aluminum, tantalum, and titanium, wherein anodic oxidation is effected at a temperature not higher than room temperature, preferably, at 10.degree. C. or lower, and more preferably, at 0.degree. C. or lower. The surface oxidation rate of a metallic interconnection can be maintained constant to provide a surface free of irregularities.
摘要:
Method of fabricating semiconductor devices such as thin-film transistors by annealing a substantially amorphous silicon film at a temperature either lower than normal crystallization temperature of amorphous silicon or lower than the glass transition point of the substrate so as to crystallize the silicon film. Islands, stripes, lines, or dots of nickel, iron, cobalt, or platinum, silicide, acetate, or nitrate of nickel, iron, cobalt, or platinum, film containing various salts, particles, or clusters containing at least one of nickel, iron, cobalt, and platinum are used as starting materials for crystallization. These materials are formed on or under the amorphous silicon film.