摘要:
A method for adjusting the flatness of a lithographic mask includes determining an initial mask flatness of the mask, determining an applied stress for bringing the mask to a desired mask flatness, and determining a mounting temperature of a pellicle frame to be mounted to the mask, the mounting temperature corresponding to the applied stress. The actual temperature of the pellicle frame is adjusted to the determined mounting temperature.
摘要:
A method for modulating the stress caused by bird beak formation of small width devices by a nitrogen plasma treatment. The nitrogen plasma process forms a nitride liner about the trench walls that serves to prevent the formation of bird beaks in the isolation region during a subsequent oxidation step. In one embodiment, the plasma nitridation process occurs after trench etching, but prior to trench fill. In yet another embodiment, the plasma nitridation process occurs after trench fill. In yet another embodiment, a block mask is formed over predetermined active areas of the etched substrate prior to the plasma nitridation process. This embodiment is used in protecting the PFET device area from the plasma nitridation process thereby providing a means to form a PFET device area in which stress caused by bird beak formation increases the device performance of the PFET.
摘要:
A micromechanical sensor probe for a scanned-probe tool includes a silicon cantilever and a silicon tip physically attached to the cantilever. The micromechanical sensor probe has a coating of a refractory metal silicide formed at least on the tip. Titanium silicide is preferred. The probe also has a layer of refractory metal nitride formed entirely over the refractory metal silicide.
摘要:
A computer implemented method for efficiently evaluating a Fourier sine/cosine transform of a bounded analytical function is described. The transform is computed in a plurality of steps which reduces the required transform to a sum of two terms which can be efficiently evaluated using a digital computer. The computer evaluates the first and second terms as definite integrals. The first integral is evaluated via standard techniques, and the second integral is evaluated as a definite integral of a sum of terms which converges. The method is advantageously used to provide a model of semiconductor devices which takes into account quantum mechanical effects while minimizing compute operation time. A look-up table of semiconductor carrier density versus spatially dependent field values can optionally be constructed.
摘要:
A semiconductor structure includes a semiconductor-on-insulator substrate, the semiconductor-on-insulator substrate comprising a handle wafer, a buried oxide (BOX) layer on top of the handle wafer, and a top silicon layer on top of the BOX layer; and an implantation region located in the top silicon layer, the implantation region comprising a noble gas.
摘要:
A structure for a semiconductor device includes an isolated MOSFET (e.g., NFET) having triple-well technology adjacent to an isolated PFET which itself is adjacent to an isolated NFET. The structure includes a substrate in which is formed a deep n-band region underneath any n-wells, p-wells and p-band regions within the substrate. One p-band region is formed above the deep n-band region and underneath the isolated p-well for the isolated MOSFET, while another p-band region is formed above the deep n-band region and underneath all of the p-wells and n-wells, including those that are part of the isolated PFET and NFET devices within the substrate. The n-wells for the isolated MOSFET are connected to the deep n-band region. The resulting structure provides for improved device isolation and reduction of noise propagating from the substrate to the FETs while maintaining the standard CMOS spacing layout spacing rules and electrical biasing characteristics both external and internal to the triple-well isolation regions.
摘要:
A method for modulating the stress caused by bird beak formation of small width devices by a nitrogen plasma treatment. The nitrogen plasma process forms a nitride liner about the trench walls that serves to prevent the formation of bird beaks in the isolation region during a subsequent oxidation step. In one embodiment, the plasma nitridation process occurs after trench etching, but prior to trench fill. In yet another embodiment, the plasma nitridation process occurs after trench fill. In yet another embodiment, a block mask is formed over predetermined active areas of the etched substrate prior to the plasma nitridation process. This embodiment is used in protecting the PFET device area from the plasma nitridation process thereby providing a means to form a PFET device area in which stress caused by bird beak formation increases the device performance of the PFET.
摘要:
A method for measuring an integrated circuit (IC) structure by measuring an imprint of the structure, a method for preparing a test site for the above measuring, and IC so formed. The method for preparing the test site includes incrementally removing the structure from the substrate so as to reveal an imprint of the removed bottom surface of the structure in a top surface of the substrate. The imprint can then be imaged using an atomic force microscope (AFM). The image can be used to measure the bottom surface of the structure.
摘要:
A method for adjusting the flatness of a lithographic mask includes determining an initial mask flatness of the mask, determining an applied stress for bringing the mask to a desired mask flatness, and determining a mounting temperature of a pellicle frame to be mounted to the mask, the mounting temperature corresponding to the applied stress. The actual temperature of the pellicle frame is adjusted to the determined mounting temperature, and the pellicle frame is mounted to the mask at the mounting temperature.
摘要:
A method for calibrating a software model for a given structure of interest for a variable imposed by an adjacent structure. First determine the spatial extent of the variable imposed by the adjacent structure. Then assign a value to the spatial extent, which varies as a function of distance from the adjacent structure to the given structure. Finally, attach that value to the model of the given structure.