摘要:
There is provided a semiconductor device having a new structure which allows a high reliability and a high field effect mobility to be realized in the same time. In an insulated gate transistor having an SOI structure utilizing a mono-crystal semiconductor thin film on an insulating layer, pinning regions are formed at edge portions of a channel forming region. The pinning regions suppress a depletion layer from spreading from the drain side and prevent a short-channel effect. In the same time, they also function as a path for drawing out minority carriers generated by impact ionization to the outside and prevent a substrate floating effect from occurring.
摘要:
To a provide a method of forming a layered film of a silicon nitride film and a silicon oxide film on a glass substrate in a short time without requiring a plurality of film deposition chambers. In a thin film transistor, a layered film including a silicon nitride oxide film (12) is formed between a semiconductor layer (13) and a substrate (11) using the same chamber. The silicon nitride oxide film has a continuously changing composition ration of nitrogen or oxygen. An electric characteristic of the TFT is thus improved.
摘要:
On a transparent substrate to which a gate electrode is arranged, a silicon nitride film and a silicon oxide film to be gate insulating films are deposited, and further, a polycrystalline silicon film as a semiconductor film to be an active region is formed. On the polycrystalline silicon film corresponding to the gate electrode, a stopper is arranged, and a silicon oxide film and a silicon nitride film to be an interlayer insulating films are deposited so as to cover this stopper. The film thickness T0 of the stopper is set in a range of 800 angstroms to 1200 angstroms. Furthermore, the film thickness T0 of the stopper is set in the range to fulfill the following expression: T0nullT1null(T2null8000 null)nullwhere T1 is the film thickness of the silicon oxide film and T2 is the film thickness of the silicon nitride film.
摘要:
A method has been provided to form a sheet of large grain crystallized silicon, in an early stage of transistor production, before the areas of the source and drain are defined. The method takes advantage of high annealing temperatures and transition metals to speed the lateral growth of silicide. By using higher temperatures, the number of amorphous enclaves is minimized and the transition metal nucleation site can be made small. A small transition metal nucleation site, in turn, can be more easily located near the center of a transistor, or where it is convenient. After annealing, the areas close to the silicide nucleation site are transformed into polycrystalline with a high electron mobility, desirable for the formation of source/drain and channel regions. Silicide products, away from the transistor active areas, are etched away when the area of the source and drain are defined. A product by process using the method of the above-described invention is also provided.
摘要:
A thin film transistor of this invention has a structure obtained by sequentially stacking, on an insulating substrate, a silicon nitride film, a silicon oxide film, a polysilicon thin film with a channel region and source and drain regions facing each other via the channel region, an insulating film, and a gate electrode. The boron concentration decreases from the channel region toward the silicon nitride film in the silicon oxide film region between the channel region and the silicon nitride film. The silicon oxide film region between the channel region and the silicon nitride film is made up of a first region which is in contact with the channel region and has a boron concentration of 1null1016 atoms/cm3 or more, and a second region between the first region and the silicon nitride film, which has a boron concentration of less than 1null1016 atoms/cm3. The first region has a thickness of 200 null or less.
摘要翻译:本发明的薄膜晶体管具有以下结构:在绝缘基板上依次层叠氮化硅膜,氧化硅膜,具有沟道区域的多晶硅薄膜,以及经由沟道区域彼此相对的源极和漏极区域 ,绝缘膜和栅电极。 在沟道区域和氮化硅膜之间的氧化硅膜区域中,硼浓度从沟道区域朝向氮化硅膜减少。 沟道区域和氮化硅膜之间的氧化硅膜区域由与沟道区域接触并具有1×10 16原子/ cm 3以上的硼浓度的第一区域和第一区域之间的第二区域构成, 和硼浓度小于1×10 16原子/ cm 3的氮化硅膜。 第一区域的厚度为200埃以下。
摘要:
A silicon oxide film 3null, 3null is formed on each of the main surfaces of a first silicon single crystal substrate 1 (bond wafer) and a second silicon single crystal substrate 2 (base wafer), and the first and second silicon single crystal substrates are then brought into close contact so as to locate the silicon oxide films 3null, 3null in between in an atmosphere of a clean air supplied through a boron-releasable filter, to thereby produce an SOI wafer 10. The second silicon single crystal substrate 2 employed herein comprises a silicon single crystal substrate having a bulk resistivity of 100 nullnullcm or above. In thus produced SOI wafer 10, the silicon oxide film 3 has a depth profile of boron concentration in which the boron concentration reaches maximum at a thickness-wise position. This ensures manufacturing of SOI wafer excellent in high-frequency characteristics.
摘要:
A device having a raised segment, and a manufacturing method for same. An SOI wafer is provided having a substrate, an insulating layer disposed over the substrate, and a layer of semiconductor material disposed over the insulating layer. The semiconductor material is patterned to form a mesa structure. The wafer is annealed to form a raised segment on the mesa structure.
摘要:
Disclosed is an MEMS device using an SOI wafer, the MEMS device comprising a first silicon layer, an insulation layer formed on the first insulation layer, a second silicon layer formed on the insulation layer, a protective layer formed on the second silicon layer, and a ground hole extending from an upper portion of the protective layer to the first silicon layer and having a conductive material therein, whereby a handle wafer in the MEMS device is connected to the ground hole without performing any additional wiring or bonding process.
摘要:
A lower buried oxide film, a stress-relief film, an upper buried oxide film, and an SOI film are formed over a semiconductor substrate in this order. The thermal expansion coefficient of the stress-relief film is greater than the thermal expansion coefficient of the upper buried oxide film. The stress-relief film desirably has a thermal expansion coefficient equal to or greater than the thermal expansion coefficient of the SOI film. For example, it is formed of a silicon film, or of a composite film laminating a silicon film, a germanium film disposed thereon, and a silicon film disposed thereon. Accordingly, a semiconductor device having an SOI MOSFET is to be provided, which has excellent characteristics such as low parasitic capacitance and a small S value and is hardly affected by the stress generated by the difference between thermal expansion coefficients of the buried oxide film and the SOI film.
摘要:
A Silicon On Insulator (SOI) structure and method of producing an SOI structure that can prevent a short circuit between a Local Inter-Connect (LIC) and a well in the SOI structure is disclosed. The SOI structure includes a BOX layer of insulation material formed on a silicon substrate; an SOI layer formed on the BOX layer; a well formed within a device isolation area of the SOI layer such that its lower surface is in contact with the BOX layer; a field oxide film formed on a surface side within the well; a gate line formed across an active area on the SOI layer and a portion on the field oxide film; an Nnull type source/drain area formed within the active area along both sides of the gate line to contact its lower surface with the BOX layer; an insulation layer formed on such resultant structure; and an opening part that is formed within the insulation layer. The opening part can be opened in a Full Trench (FT) structure so that the active area is partially exposed, and can be opened in a Partial Trench (PT) structure on the field oxide film so that an upper part of the gate line of an adjacent transistor is exposed. An LIC fills in the opening part within the insulation layer, and in such construction, the SOI element is designed by an FT-LIC structure where the LIC is contacted with one portion of the active area of an optional transistor, and by a PT-LIC structure where the LIC is contacted with an upper part of the gate line on the field oxide film.