Semiconductor device including multi-layer conductive thin film

Details Semiconductor device including multi-layer conductive thin film Semiconductor device including multi-layer conductive thin film

1993-12-22

1995-08-22

Saadat, Mahshid D.

Active solid-state devices (e.g., transistors, solid-state diode

Combined with electrical contact or lead

Of specified material other than unalloyed aluminum

257413, 257748, 257756, 437186, 437193, 437233, H01L 2348, H01L 2946

Patent

active

054443024

ABSTRACT:
In forming an electrode 2 on a silicon 6 oxide film 5 on a semiconductor substrate 4 through a silicon oxide film 5, for example, the gate electrode 2 is structured in a laminated structure of a plurality of polycrystalline silicon layers 6. The portion of the gate electrode 2 is formed by a method of manufacturing a thin film having a process of depositing amorphous layers and a process of crystallizing (recrystallizing) this amorphous material. In this case, depositing of the amorphous layers is carried out dividedly by a plurality of times so that the thickness of an amorphous layer to be deposited at one time is not larger than a thickness to be prescribed by a critical stress value determined according to a fail event, the amorphous material is crystallized after each process of depositing each amorphous layer has been finished, and the process of depositing amorphous layers and the process of crystallizing the amorphous material are repeated, whereby a laminated structure of the polycrystalline layer 6 having a necessary film thickness is obtained. With the above-described arrangement, it is possible to prevent a deterioration of electric characteristics of a semiconductor device and an occurrence of a defect, such as a peeling off between layers, cracks in a layer, etc., and it is possible to obtain a polycrystalline layer of small grain size in a desired film thickness by a lamination of polycrystalline materials.

REFERENCES:
patent: 4566175 (1986-01-01), Smayling et al.
patent: 4613956 (1986-09-01), Paterson et al.
patent: 5256894 (1993-10-01), Shino

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