Abstract:
A method for fabricating a semiconductor device on a silicon substrate, consists of producing a silicon oxide film on the silicon substrate producing a thin silicon nitride film on the silicon oxide film, thermally nitriding the silicon nitride film in an atmosphere of nitrogenous gas, producing a conductive film on the silicon nitride film nitrided in the atmosphere of the nitrogenous gas, producing a gate region from the silicon oxide film, the silicon nitride film, and the conductive film, a channel region being positioned under the gate region in the silicon substrate, producing a source region in the silicon substrate adjacent to one side of the channel region, producing a drain region in the silicon substrate adjacent to another side of the channel region, and producing wiring regions on the source region, the drain region, and the gate region.
Abstract:
A method of manufacturing a semiconductor device, which comprises the steps of providing a semiconductor substrate having a first primary surface which is designated to form the semiconductor device and a second primary surface opposite from the first primary surface, the substrate containing contaminants therein; forming a boron-doped layer on the second primary surface of the substrate; and absorbing the contaminants into the boron-doped layer.
Abstract:
A method and an apparatus for heat treating in a heat treating apparatus having a heating chamber to be introduced with predetermined gas, a heater disposed around the heating chamber, and jigs disposed in the heating chamber for supporting wafers of a plurality of substrates to be treated in parallel with each other, wherein in order to make the temperature distribution of the wafers of the substrates to be treated in the radial direction uniform in the heat treatment, the jigs are formed to determine the sizes and the shape thereof in predetermined ranges having a gradient according to the heat treating method having a predetermined shape determining procedure so that the jigs are formed in ring-shaped trays (i.e. support-ring) for holding at the peripheries the substrates to be treated and the thickness of the tray is constant or such that the outer peripheral side thereof is thicker than the inner peripheral side thereof.
Abstract:
In order to form an insulating film, which constitutes a flat interface with silicon, by CVD, a surface of silicon is oxidized to form a silicon oxide film using a plasma treatment apparatus in which microwaves are introduced into a chamber through a flat antenna having a plurality of holes. A silicon oxide film is formed as an insulating film on the silicon oxide film by CVD. Further, in the plasma treatment apparatus, a treating gas containing a noble gas and oxygen is introduced into the chamber, and, further, microwaves are introduced into the chamber through the flat antenna. Plasma is generated under a pressure in the range of not less than 6.7 Pa and not more than 533 Pa to modify the insulating film with the plasma.
Abstract:
A semiconductor device includes a semiconductor substrate having first and second main surfaces and including a denuded zone, in which an oxygen concentration is lower than that in an inner portion of the semiconductor substrate and which does not include a bulk microdefect, and an intrinsic gettering zone, and element region formed on the first surface of the semiconductor substrate, and an extrinsic gettering layer, made of an amorphous semiconductor material which traps a metal impurity, and formed directly on at least a portion of the intrinsic gettering region or the denuded zone entirely or partially thinned of the second main surface of the semiconductor substrate. A method for manufacturing a semiconductor device includes the steps of forming an element region on a first main surface of a semiconductor substrate having first and second main surfaces and having an intrinsic gettering zone, and forming an extrinsic gettering layer, made of an amorphous semiconductor material which traps a metal impurity, directly on at least a portion of the intrinsic gettering region of the second main surface of the semiconductor substrate.
Abstract:
A semiconductor device includes a semiconductor substrate having first and second main surfaces and including a denuded zone, in which an oxygen concentration is lower than that in an inner portion of the semiconductor substrate and which does not include a bulk microdefect, and an intrinsic gettering zone, an element region formed on the first surface of the semiconductor substrate, and an extrinsic gettering layer, made of an amorphous semiconductor material which traps a metal impurity, and formed directly on at least a portion of the intrinsic gettering region or the denuded zone entirely or partially thinned of the second main surface of the semiconductor substrate. A method for manufacturing a semiconductor device includes the steps of forming an element region on a first main surface of a semiconductor substrate having first and second main surfaces and having an intrinsic gettering zone, and forming an extrinsic gettering layer, made of an amorphous semiconductor material which traps a metal impurity, directly on at least a portion of the intrinsic gettering region of the second main surface of the semiconductor substrate.
Abstract:
A semiconductor device includes a monocrystalline silicon substrate, an insulating film consisting of a monocrystalline silicon oxide formed on the surface of the monocrystalline silicon substrate, and a conductive film formed on the insulating film. The monocrystalline silicon substrate has a (100) plane orientation, the insulating film essentially consists of .beta.-cristobalite having a unit structure in a P4.sub.1 2.sub.1 2 structural expression in such a manner that every other silicon atoms of four silicon atoms aligned about a C-axis are arranged on two adjacent silicon atoms aligned in a 110! direction on an Si (100) plane, and that a plane including the C-axis of the .beta.-cristobalite and the 110! direction is set perpendicular to the (100) plane.
Abstract:
In fabricating a semiconductor device, when impurities are diffused from a silicon oxide layer containing the impurities to a semiconductor layer, a diffusion atmosphere is controlled so as to oxidize or reduce a specified impurity to thereby control the diffusion coefficient of the impurities in the silicon oxide layer. Thus, it is possible to form a diffusion layer having a desired impurity profile under a good control.
Abstract:
A method of forming an MOS capacitor by the steps of cutting a groove in the surface of a silicon substrate by the RIE process, thermally oxidizing the surface of said silicon substrate, depositing a capacitor electrode on said capacitor-insulating layer, being characterized in that when the capacitor-insulating layer is deposited, the surface of the silicon substrate is thermally oxidized in an oxidizing atmosphere containing 15% by vol. of steam.
Abstract:
To form a good quality silicon oxide film provided with both a superior Qbd characteristic and Rd characteristic, a wafer W is loaded into a plasma treatment apparatus where the surface of a silicon layer 501 of the wafer W is treated by plasma oxidation to form on the silicon layer 501 to a film thickness T1 a silicon oxide film 503. Next, the wafer W on which the silicon oxide film 503 is formed is transferred to a thermal oxidation treatment apparatus where the silicon oxide film 503 is treated by thermal oxidation to thereby form a silicon oxide film 505 having a target film thickness T2.