Abstract:
A method for producing a transistor structure utilizing ion implantation, comprising the steps of implanting ions of baseforming impurity into a predetermined portion of a surface of a semiconductor body serving as a collector and heated to a temperature above 600* C. but below the melting point of the semiconductor to form a base region, and thereafter implanting ions of emitter-forming impurity into a predetermined portion of the surface of said base region heated to a temperature in the range of 400* to 600* C. to form an emitter region.
Abstract:
A first insulating film of silicon dioxide is provided on the surface of a semiconductor device, and a second silicon dioxide layer containing uniformly a small amount of phosphorus is deposited from the vapor phase on said first insulating film, thereby realizing stable passivation of the electrical characteristics of said semiconductor device. The waterproof property and accurate etching of said films are also accomplished.
Abstract:
A semiconductor body acting as a collector is directed at a predetermined surface area by an inert ion beam from such a direction as not to produce a channeling effect in the body, whereby obtaining an amorphous surface region thereat, then directed at a larger surface area including said predetermined surface area by an active impurity ion beam of the conductivity type opposite to said body from a direction producing the channeling effect in the body, thereby obtaining a base region in the semiconductor body with a PN junction therebetween which has a partial projection in its bottom part, and further directed at said predetermined surface area by an active impurity ion beam of the same conductivity type as that of the body from the channeling-effect-providing direction, thereby obtaining an emitter region, and finally heat-treating, so that a transistor without defects due to the emitter dip effect is obtained.
Abstract:
Disclosed is a method of forming a PN junction comprising the steps of implanting impurity ions into an insulating layer formed on the surface of a semiconductor substrate and then diffusing the implanted impurity ions into the surface layer of the semiconductor substrate thereunder.