Abstract: A dielectric film is formed by depositing an amorphous strontium oxide film to a thickness of one to several atomic layers on a first electrode layer, then depositing an amorphous titanium oxide film to a thickness of one to several atomic layers on the amorphous strontium oxide film, and then heat-treating a laminated film of the amorphous strontium oxide film and the amorphous titanium oxide film at a temperature close to a crystallization start temperature, thereby converting the laminated film to a single-layer amorphous strontium titanate film containing a plurality of crystal grains therein. The laminated film may have a plurality of amorphous strontium oxide films and a plurality of amorphous titanium oxide films that are alternately laminated. A semiconductor device includes a capacitor having as its dielectric film a single-layer amorphous strontium titanate film containing a plurality of crystal grains therein.

Abstract: First, a base structure provided with the main parts of a memory cell is prepared, and a lower electrode comprising a polycrystalline silicon film is thereafter formed on the base structure. Next, the surface of the lower electrode is thermally nitrided at a predetermined temperature to form a silicon nitride film. In the thermal nitridation of the lower electrode, the temperature is increased to a predetermined nitriding temperature, after which the temperature is reduced at a rate that is more gradual than usual. Aluminum oxide (Al2O3) or another metal oxide dielectric film is thereafter formed as the capacitive insulating film on the lower electrode, and an upper electrode is formed on the capacitive insulating film.

Abstract: Nanolaminate-structure SrO/TiO films are formed on a lower electrode of a capacitor by molecular layer deposition kept in a rate-determined state by a surface reaction. The nanolaminate-structure SrO/TiO films are formed by alternately laminating one or more and 20 or less SrO molecular layers and one or more and 20 or less TiO molecular layers at 150° C. or more and 400° C. or less and at 10 Torr or more and the atmospheric pressure or less. This makes it possible to obtain the nanolaminate-structure SrO/TiO films with a high permittivity and a high coverage and with no occurrence of crystalline foreign substance.

Abstract: A dielectric film is formed by depositing an amorphous strontium oxide film to a thickness of one to several atomic layers on a first electrode layer, then depositing an amorphous titanium oxide film to a thickness of one to several atomic layers on the amorphous strontium oxide film, and then heat-treating a laminated film of the amorphous strontium oxide film and the amorphous titanium oxide film at a temperature close to a crystallization start temperature, thereby converting the laminated film to a single-layer amorphous strontium titanate film containing a plurality of crystal grains therein. The laminated film may have a plurality of amorphous strontium oxide films and a plurality of amorphous titanium oxide films that are alternately laminated. A semiconductor device includes a capacitor having as its dielectric film a single-layer amorphous strontium titanate film containing a plurality of crystal grains therein.

Abstract: A dielectric film is formed by depositing an amorphous strontium oxide film to a thickness of one to several atomic layers on a first electrode layer, then depositing an amorphous titanium oxide film to a thickness of one to several atomic layers on the amorphous strontium oxide film, and then heat-treating a laminated film of the amorphous strontium oxide film and the amorphous titanium oxide film at a temperature close to a crystallization start temperature, thereby converting the laminated film to a single-layer amorphous strontium titanate film containing a plurality of crystal grains therein. The laminated film may have a plurality of amorphous strontium oxide films and a plurality of amorphous titanium oxide films that are alternately laminated. A semiconductor device includes a capacitor having as its dielectric film a single-layer amorphous strontium titanate film containing a plurality of crystal grains therein.

Abstract: Nanolaminate-structure SrO/TiO films are formed on a lower electrode of a capacitor by molecular layer deposition kept in a rate-determined state by a surface reaction. The nanolaminate-structure SrO/TiO films are formed by alternately laminating one or more and 20 or less SrO molecular layers and one or more and 20 or less TiO molecular layers at 150° C. or more and 400° C. or less and at 10 Torr or more and the atmospheric pressure or less. This makes it possible to obtain the nanolaminate-structure SrO/TiO films with a high permittivity and a high coverage and with no occurrence of crystalline foreign substance.

Abstract: A dielectric film is formed by depositing an amorphous strontium oxide film to a thickness of one to several atomic layers on a first electrode layer, then depositing an amorphous titanium oxide film to a thickness of one to several atomic layers on the amorphous strontium oxide film, and then heat-treating a laminated film of the amorphous strontium oxide film and the amorphous titanium oxide film at a temperature close to a crystallization start temperature, thereby converting the laminated film to a single-layer amorphous strontium titanate film containing a plurality of crystal grains therein. The laminated film may have a plurality of amorphous strontium oxide films and a plurality of amorphous titanium oxide films that are alternately laminated. A semiconductor device includes a capacitor having as its dielectric film a single-layer amorphous strontium titanate film containing a plurality of crystal grains therein.

Abstract: In a method of manufacturing a semiconductor device, a lower electrode of a capacitor is formed above a semiconductor substrate. Thermal treatment is carried out to a base layer, which includes the lower electrode, in an atomic layer deposition apparatus. A dielectric film is formed on the base layer after the thermal treatment by an atomic layer deposition method without exposing the substrate to air. An upper electrode of the capacitor is formed on the dielectric film.

Abstract: First, a base structure provided with the main parts of a memory cell is prepared, and a lower electrode comprising a polycrystalline silicon film is thereafter formed on the base structure. Next, the surface of the lower electrode is thermally nitrided at a predetermined temperature to form a silicon nitride film. In the thermal nitridation of the lower electrode, the temperature is increased to a predetermined nitriding temperature, after which the temperature is reduced at a rate that is more gradual than usual. Aluminum oxide (Al2O3) or another metal oxide dielectric film is thereafter formed as the capacitive insulating film on the lower electrode, and an upper electrode is formed on the capacitive insulating film.

Abstract: A method for forming a capacitor insulation film having a high dielectric constant includes the steps of depositing an amorphous strontium titanate film on a bottom electrode, forming a top electrode on the strontium titanate film and heat treating the strontium titanate film at a temperature between 500 degrees C. and 650 degrees C. in an inert gas ambient to crystallize the amorphous strontium titan ate film.

Abstract: An integrated semiconductor device has an improved reliability and is adapted to a higher degree of integration without reducing the accumulated electric charge of each information storage capacity element. The semiconductor device is provided with a DRAM having memory cells, each comprising an information storage capacity element C connected in series to a memory cell selection MISFET Qs formed on a main surface of a semiconductor substrate 1 and having a lower electrode 54, a capacity insulating film 58 and an upper electrode 59. The lower electrode 54 is made of ruthenium film oriented in a particular plane bearing, e.g., a (002) plane, and the capacity insulating film 58 is made of a polycrystalline tantalum film obtained by thermally treating an amorphous tantalum oxide film containing crystal of tantalum oxide in an as-deposited state for crystallization.

Abstract: Plug electrodes of silicon are formed so as to be buried in through holes in a first insulating film, the plug electrodes being electrically connected to the source and drain regions of a MISFET on the main surface of a semiconductor substrate. Then, a second insulating film is deposited thereon and holes are formed therein such that the plug electrodes of silicon are exposed. A barrier film is formed on the surfaces of the silicon plugs, and in the holes a dielectric is formed to form lower electrodes of the capacitor elements and an upper electrode therefor.

Abstract: A semiconductor integrated circuit device including a memory cell comprising a memory cell selecting MISFET Qs formed on the main surface of a semiconductor substrate 1 and an information storage capacitor C that is connected in series to said memory cell selecting MISFET Qs, and that have a lower electrode 54, a capacitor insulator 58 and an upper electrode 59, wherein the lower electrode 54 is made of a conductive material containing ruthenium dioxide (RuO2) as principle ingredient and the capacitor insulator 58 is made of crystalline tantalum pentoxide. Thus, the capacitance required for the memory cells of a 256 Mbits DRAM or those of a DRAM of a later generation can be secured.

Abstract: An integrated semiconductor device has an improved reliability and is adapted to a higher degree of integration without reducing the accumulated electric charge of each information storage capacity element. The semiconductor device is provided with a DRAM having memory cells, each comprising an information storage capacity element C connected in series to a memory cell selection MISFET Qs formed on a main surface of a semiconductor substrate 1 and having a lower electrode 54, a capacity insulating film 58 and an upper electrode 59. The lower electrode 54 is made of ruthenium film oriented in a particular plane bearing, e.g., a (002) plane, and the capacity insulating film 58 is made of a polycrystalline tantalum film obtained by thermally treating an amorphous tantalum oxide film containing crystal of tantalum oxide in an as-deposited state for crystallization.

Abstract: A semiconductor integrated circuit device including a memory cell comprising a memory cell selecting MISFET Qs formed on the main surface of a semiconductor substrate 1 and an information storage capacitor C that is connected in series to said memory cell selecting MISFET Qs, and that have a lower electrode 54, a capacitor insulator 58 and an upper electrode 59, wherein the lower electrode 54 is made of a conductive material containing ruthenium dioxide (RuO2) as principle ingredient and the capacitor insulator 58 is made of crystalline tantalum pentoxide. Thus, the capacitance required for the memory cells of a 256 Mbits DRAM or those of a DRAM of a later generation can be secured.

Abstract: An integrated semiconductor device has an improved reliability and is adapted to a higher degree of integration without reducing the accumulated electric charge of each information storage capacity element. The semiconductor device is provided with a DRAM having memory cells, each comprising an information storage capacity element C connected in series to a memory cell selection MISFET Qs formed on a main surface of a semiconductor substrate 1 and having a lower electrode 54, a capacity insulating film 58 and an upper electrode 59. The lower electrode 54 is made of ruthenium film oriented in a particular plane bearing, e.g., a (002) plane, and the capacity insulating film 58 is made of a polycrystalline tantalum film obtained by thermally treating an amorphous tantalum oxide film containing crystal of tantalum oxide in an as-deposited state for crystallization.

Abstract: A semiconductor integrated circuit device including a memory cell comprising a memory cell selecting MISFET Qs formed on the main surface of a semiconductor substrate 1 and an information storage capacitor C that is connected in series to said memory cell selecting MISFET Qs, and that have a lower electrode 54, a capacitor insulator 58 and an upper electrode 59, wherein the lower electrode 54 is made of a conductive material containing ruthenium dioxide (RuO2) as principle ingredient and the capacitor insulator 58 is made of crystalline tantalum pentoxide. Thus, the capacitance required for the memory cells of a 256 Mbits DRAM or those of a DRAM of a later generation can be secured.

Abstract: Plug electrodes of silicon are formed being buried in the through holes in a first insulating film, the plug electrodes being electrically connected to the source and drain regions of a MISFET on the main surface of a semiconductor substrate. Then, a second insulating film is deposited thereon and holes are formed therein such that the plug electrodes of silicon are exposed. A barrier film is formed on the surfaces of the silicon plugs, and in the holes are formed a dielectric to form lower electrodes of the capacitor elements and an upper electrode therefor.