Abstract:
A MTJ for a spintronic device is disclosed and includes a thin seed layer that enhances perpendicular magnetic anisotropy (PMA) in an overlying laminated layer with a (Co/X)n or (CoX)n composition where n is from 2 to 30, X is one of V, Rh, Ir, Os, Ru, Au, Cr, Mo, Cu, Ti, Re, Mg, or Si, and CoX is a disordered alloy. A CoFeB layer may be formed between the laminated layer and a tunnel barrier layer to serve as a transitional layer between a (111) laminate and (100) MgO tunnel barrier. The laminated layer may be used as a reference layer, dipole layer, or free layer in a MTJ. Annealing between 300° C. and 400° C. may be used to further enhance PMA in the laminated layer.
Abstract:
Disclosed is a Zener diode having a scalable reverse-bias breakdown voltage (Vb) as a function of the position of a cathode contact region relative to the interface between adjacent cathode and anode well regions. Specifically, cathode and anode contact regions are positioned adjacent to corresponding cathode and anode well regions and are further separated by an isolation region. However, while the anode contact region is contained entirely within the anode well region, one end of the cathode contact region extends laterally into the anode well region. The length of this end can be predetermined in order to selectively adjust the Vb of the diode (e.g., increasing the length reduces Vb of the diode and vice versa). Also disclosed are an integrated circuit, incorporating multiple instances of the diode with different reverse-bias breakdown voltages, a method of forming the diode and a design structure for the diode.
Abstract:
There is provided a thermal treatment method of a silicon wafer. The method includes the successive steps of: (a) terminating silicon atoms existing on an active surface of the silicon wafer with hydrogen, wherein the active surface is mirror-polished, and a semiconductor device is to be formed on the active surface; (b) terminating the silicon atoms existing on the active surface of the silicon wafer with fluorine; (c) rapidly heating the silicon wafer to a first temperature under an inert gas atmosphere or a reducing gas atmosphere, wherein the first temperature is in a range of 1300° C. to 1400° C.; (d) holding the silicon wafer at the first temperature for a certain time; and (e) rapidly cooling the silicon wafer.
Abstract:
A polishing method for a heterostructure of at least one relaxed superficial heteroepitaxial layer on a substrate made of a different material. The method includes a first chemical mechanical polishing step of the surface of the heteroepitaxial layer performed with a polishing cloth having a first compressibility ratio and with a polishing solution having a first silica particle concentration. The first chemical mechanical polishing step is followed by a second chemical mechanical polishing step of the surface of the heteroepitaxial layer, with the second step being performed with a polishing cloth having a second compressibility ratio, higher than the first compressibility ratio, and with a polishing solution having a second silica particle concentration, lower than the first concentration. By this method, improved surface roughness is achieved.
Abstract:
A MEMS device comprising a flexible membrane that is free to move in response to pressure differences generated by sound waves. A first electrode mechanically coupled to the flexible membrane, and together form a first capacitive plate. A second electrode mechanically coupled to a generally rigid structural layer or back-plate, which together form a second capacitive plate. A back-volume is provided below the membrane. A first cavity located directly below the membrane. Interposed between the first and second electrodes is a second cavity. A plurality of bleed holes connected the first cavity and the second cavity. Acoustic holes are arranged in the back-plate so as to allow free movement of air molecules, such that the sound waves can enter the second cavity. The first and second cavities in association with the back-volume allow the membrane to move in response to the sound waves entering via the acoustic holes in the back-plate.
Abstract:
A method of manufacturing a thin silicon wafer by slicing a silicon single crystal includes: a thinning step S3 of polishing a rear surface of the silicon wafer to reduce the thickness of the silicon wafer after a device structure is formed on a front surface of the silicon wafer; a mirror surface forming step S4 of processing the rear surface of the silicon wafer into a mirror surface using a chemical mechanical polishing method; and a modifying step S5 of dispersing abrasive grains that are harder than those used to form the mirror surface in the mirror surface forming process and forming a damaged layer, serving as a gettering sink for heavy metal, on the rear surface of the silicon wafer using the chemical mechanical polishing method. The thickness T5b of the damaged layer W5b in a wafer depth direction is set by the chemical mechanical polishing method in the modifying step S5 to control the gettering capability of the damaged layer.
Abstract:
A method for manufacturing a device includes mapping extreme vertical boundary conditions of a mask layer based on vertical edges of a deposited first layer and a second layer. The mask layer is deposited over portions of the second layer based on the mapping step. The exposed area of the second layer is etched to form a smooth boundary between the first layer and the second layer. The resist layer is stripped. The resulting device is an improved PFET device and NFET device with a smooth boundary between the first and second layers such that a contact can be formed at the smooth boundary without over etching other areas of the device.
Abstract:
An organic light emitting display device and a method of fabricating the same are provided, which employ an Ag alloy containing Sm, Tb, Au, and Cu to simultaneously form a source electrode, a drain electrode, and a first electrode of the organic light emitting display device for increasing the reflectivity and efficiency of the organic light emitting display device and reducing the organic light emitting display device panel size by reducing a line width of the source and drain electrodes due to the low resistance of the source and drain electrodes.
Abstract:
A method of preventing the formation of cracks on the backside of a silicon (Si) semiconductor chip or wafer during the processing thereof. Also provided is a method for inhibiting the propagation of cracks, which have already formed in the backside of a silicon chip during the processing thereof and prior to the joining thereto of a substrate during the fabrication of an electronic package. The methods entail either treating the backside with a wet etch, or alternatively, applying a protective film layer thereon prior to forming an electronic package incorporating the chip or wafer.
Abstract:
A method of manufacturing a vertical semiconductor device includes preparing a semiconductor wafer which has a heavily doped semiconductor substrate and a lightly doped semiconductor layer disposed over the semiconductor substrate, forming a semiconductor element at a surface portion of the semiconductor layer, forming a first metal layer for a first electrode of the semiconductor element over the surface portion of the semiconductor layer, grinding a back of the semiconductor substrate to thin the semiconductor substrate and roughen a back surface of the semiconductor substrate, performing a wet etching upon the back surface; and forming on the back surface a second metal layer for a second electrode of the semiconductor element.