摘要:
A manufacturing method for transistors wherein silicide is directed doped with a conductive impurity includes the steps of: forming a field oxide film defining an active region on a semiconductor substrate; forming transistors wherein a doped first silicide film is formed on gate electrodes on said active region; forming an interlayer dielectric film having contact holes on the whole surface of said semiconductor substrate; forming spacers on the innerwalls of each contact hole;p forming a thin doped polysilicon film on the whole surface of said semiconductor surface; and forming a doped second silicide film on the whole surface of said doped polysilicon film, filling each contact hole. The silicide film is directly doped with conductive impurity so that the conductive impurity of a polysilicon film can be prevented from being diffused to the outside. Therefore, the doped silicide film is useful to prevent the threshold voltage from increasing and the saturation current from reducing.
摘要:
Methods and apparatus for plasma annealing layers of a microelectronic capacitor on a substrate are provided to improve the leakage current characteristics of a capacitor and/or to reduce the number of impurities in an electrode.
摘要:
A method for fabricating a capacitor of a semiconductor device is provided. In the capacitor fabricating method, the step of forming a lower electrode by using gas including chlorine is included after the step of forming hemispherical grained silicon (HSG—Si) seeds. Also, after the step of selectively growing only HSG—Si seeds formed on the lower electrode, the step of removing the HSG—Si seeds formed on an insulation layer pattern through an etching process using a gas including chlorine is included. Thus, the surface area of the lower electrode is increased, so that capacitance is increased. Also, an electrical short between the lower electrodes of each adjacent capacitor can be prevented without decreasing capacitance.
摘要:
An apparatus for fabricating a semiconductor device having cooling jackets for preventing a gas from being exuded in a reaction chamber, thereby minimizing the generation of contaminating particles. The apparatus includes a reaction chamber having four cooling jackets respectively mounted on a first side wall adjacent to a wafer transfer chamber, a second side wall opposite to the first side wall, an upper wall and a bottom wall. A gate valve is disposed between the reaction chamber and the wafer transfer chamber and has a fifth cooling jacket. While fabricating a polysilicon film using the above apparatus, a pressure of a cassette chamber is controlled to be less than about 0.05 mtorr. Alternatively, a pressure of a cooling chamber and the wafer transfer are both controlled to be less than about 1.0 &mgr;torr.
摘要:
A method of depositing a thin film for a semiconductor device using a lamp heating type apparatus. In the method, a wafer is loaded into a processing chamber of the apparatus, and the pressure of the chamber and the temperature of a susceptor installed in the chamber are increased to a level higher than a deposition pressure and a deposition temperature, respectively. Then, the pressure of the chamber and the temperature of the susceptor are decreased to the deposition pressure and the deposition temperature, respectively, and a film is deposited on the wafer. The vacuum of the chamber is then released and the gas remaining in the chamber and a source gas injection tube is purged.
摘要:
A method of forming a microelectronic device includes the step of forming an impurity doped amorphous silicon layer on a microelectronic substrate using plasma-enhanced chemical vapor deposition. The impurity doped amorphous silicon layer is patterned so that portions of the microelectronic substrate are exposed adjacent the patterned amorphous silicon layer. A hemispherical grained silicon layer is then formed on the patterned amorphous silicon layer. Moreover, the step of forming the impurity doped amorphous silicon layer can be performed at a temperature of 400.degree. C. or less.
摘要:
A capacitor for a semiconductor memory device and a method for manufacturing the same are provided. A lower electrode of a capacitor according to the present invention has a structure in which a first conductive layer and a second conductive layer are sequentially deposited and an HSG is selectively formed on the surface thereof. The first conductive layer is composed of an amorphous or a polycrystalline silicon film having a low concentration of impurities. The second conductive layer is composed of an amorphous silicon film having a high concentration of impurities. According to the present invention, it is possible to obtain a desirable Cmin/Cmax ratio in the lower electrode of the capacitor having an HSG silicon layer and to prevent diffusion of impurities from the lower electrode of the capacitor.
摘要:
A method for manufacturing a high capacitance capacitor having an HSG film formed on a stack-structured lower storage node, includes the step of forming insulating films for protecting the HSG film. In the present invention the lower storage node and the HSG film formed thereon are not damaged during an etch-back process. The HSG film formed on the lower storage node is protected by means of the insulating films, thereby preventing a decrease in capacitor capacitance.
摘要:
A method for interconnecting layers in a semiconductor device, which can form a low resistance contact, is provided. An insulating layer is formed on a semiconductor substrate and an opening is formed in the insulating layer. The opening is a contact hole for exposing an impurity diffusion region formed on the semiconductor substrate, or a via hole for exposing a lower conductive layer formed on the semiconductor substrate. Subsequently, a titanium ohmic contacting layer and a titanium nitride barrier layer are formed in the interior of the opening hole and on the insulating layer in sequence. Thereafter, a refractory metal layer which completely fills the remainder of the opening hole by depositing the refractory metal on the barrier layer is formed. To improve a contacting property, the resultant is heat-treated at a temperature above 450.degree. C. As a result, oxidation of the ohmic contacting layer and the barrier layer is prevented, and silicide is actively formed on the interface between the ohmic contacting layer and the silicon substrate, whereby the contacting resistance can be improved. The effect is enhanced for contact holes having a high aspect ratio and a small diameter.