Abstract:
A semiconductor integrated circuit, and process for its manufacture, are disclosed which contains both n⁺ and p⁺ gates that do not pose a risk of dopant interdiffusion. Both n⁺ and p⁺ gates may be fabricated by conventional means. The gate structures are severed over the tub boundaries (e.g., 61). A titanium nitride interconnective layer (e.g., 31) is deposited and patterned over the gates. The interconnective layer preserves connectivity between the n⁺ and p⁺ gates without risk of deleterious dopant interdiffusion.
Abstract:
A method of manufacturing a semiconductor device, in which a first pattern of conductors (20), an isolating layer (21) and a second pattern of conductors (22) are successively provided on a surface (2) of a semiconductor body (1) adjoined by a number of isolation regions (4, 10) and a number of semiconductor regions (3). Mutual contacts are established between the two patterns (20, 22) and these contacts are located both above a semiconductor region (3) and above an adjoining isolation region (4, 10) by forming conductive pillars (44) in the first pattern (20), exposing a tip (51) of the pillars (44) after an isolating layer (50) has been provided and providing the second pattern (22) over the tip (51) of the pillars (44). Thus, a large amount is saved on the surface (2).
Abstract:
Disclosed is a method of producing a semiconductor device, comprising the steps of introducing an impurity of one conductivity type into a semiconductor substrate (21) of an opposite conductivity type having an insulating film pattern (22) formed on a surface thereof, using the insulating film pattern (22) as a mask to form a diffusion layer (25a, 25b); and forming a metal film (27a to 27c) on the diffusion layer (25a, 25b) by selective vapor growth with a mixture of a metal source gas and an additive gas used as a feed gas, said vapor growth being carried out such that the distance of entry of the metal film (27a, 27b) from the edge of the insulating film pattern (22) to the interface between the insulating film pattern (22) and the diffusion layer (25a, 25b) is smaller than the depth of the pn junction of the diffusion layer (25a, 25b). The particular method makes it possible to achieve a selective vapor growth of a metal film on the diffusion layer without deteriorating the pn junction characteristics.