Abstract:
Disclosed is a method of implanting impurity ions wherein such ions are implanted into the surface of a semiconductor partially exposed by a hole in two layers, one being made of silicon oxide and the other being made of a metal such as aluminum.
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 method of transporting substances in plasma streams to and depositing them on a target in which the vapors of two or more selected materials are turned into separate ionized plasmas in separate plasma generating chambers, the plasmas are effused from their respective chambers due to the difference in plasma density between the inside and outside of the chamber to form separate plasma streams and the plasma streams are joined to form a single stream which is conducted to the surface of a substrate by means of axial magnetic fields which also serve to converge the plasma streams. In another embodiment, a single stream is branched by a magnetic field to form plural streams which are conducted to different substrates or different points on the same substrate.
Abstract:
A method of forming a shallow P-N junction under precise control of its position. An impurity doped layer of the first conductivity type is formed, so that the impurity concentration may become a maximum at substantially the surface of a semiconductor substrate or at an inner part of the semiconductor substrate. Ions of impurities of a second conductivity type, opposite to the first conductivity type, are implanted, so that the impurity concentration may become a maximum greatest at the maximum depletion layer thickness in the semiconductor substrate. The P-N junction finally formed is located within the maximum depletion layer thickness.
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.