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Silicon microstrips are widely used in nuclear physics experiments when high granularity and high resolution of the detection system is required, as, for example in particle-particle correlation measurements. In addition microstrip detectors are used in the field of X-ray detection for position resolved X-ray spectroscopy. In order to surgically probe the response of the interstrip region we tested...
As we know, both grown and deposited SiO2 is considered an amorphous material. A lot of experiments based on the silicon dioxide etching showed a series of micro and nano-formations which lead to a polycrystalline structure assumption. This paper is focused on the “crystalline” form of the SiO2 after a wet etching in NH4F:CH3COOH solution. In order to modify the selectivity of the mixture, we have...
The effects of adding Si to Co38Ni34Al28 alloys on microstructure is investigated using optical microscopy (OM). Results show that the substitution Si for Al helps to reduce the volume fraction of &#x03B3 precipitation and increase the martensitic transformation temperature. The increase of heat treatment temperature enhances solid solubility of &#x03B3 phase in β phase...
This paper investigated the effect of different doped n-type silicon on pores formation. We found that star-like shape pores occurred when low doped concentration n-type silicon sample was used while high doped concentration produced normal pores hole-shape on the surface. By increasing etching time will cause the neighbouring star-like shape branches to combine and produced bigger pores. Reasons...
The sputter-deposited Cu thin film, coated with a thinner gold layer, was prepared into the butterfly pattern with alternating zones beween Cu thin film and Si. The eutectic SnPb solder balls with different sizes were reflowed on the butterfly pattern. As a result, the liquid solder would be selectively retained on the Au/Cu film zones. At the same time, under the energy minimization control, the...
Bulk micromachining was mainly developed for Si (100) and Si (110) wafers and is based on crystallographic etching of silicon in KOH and other basic solutions, in order to obtain useful 3-dimensional structures. Recently, Si (311) joined the group of useful substrates for nanomanufacturing, but a thorough description of its capabilities was not yet reported. The hereby study investigates the particularities...
Nano scale actuators consisting of a free-standing bilayer of ferromagnetic shape memory alloy (FSMA) and silicon with critical lateral dimensions of 250 nm are designed, nanofabricated and characterized in-situ in a scanning electron microscope (SEM). Upon Joule heating and cooling, fully reversible nano actuation in out-of-plane direction of up to 4 % of actuator length is observed. In-situ measurements...
The cortical surface is composed of a mosaic of distinct regions that are functionally or micro-anatomically homogeneous. Parcellating the cortical surface into few lobes is a common approach in neuroimaging resulting from a long tradition in physiology. However, defining such sub regions consistent across subjects is more difficult. If macro-anatomical landmarks such as central sulcus and parieto-occipital...
Orbit maneuver exhibits significant applications in formation flight, spacecraft information supporting and on-orbit servicing etc. In the paper, we pay more attention to analyze spacecraft's control domain under extra maneuver ability. According to emulate different direction velocity increment in different plane thrown to spacecraft, we analyze the variation of orbit parameters change with velocity...
The dependences of the main statistical characteristics of the surface (correlation functions, surface-height distribution functions, correlation length, width of interface), average height and lateral size of grains on the formation conditions have been determined by atomic force microscopy for hemispherical-grain polycrystalline silicon Films (HSG-Si). Dependence of grains shape on the deposition...
In Livio Vacchini´s works, the structural skeleton formalizes the architectural unity language, through its analytical rigor and an order that gives proportion and hierarchy to the piece. The architect needs the new systems and information tecnologies, to achieve the abstraction and rigor required to reach the universal object. Everything happens between his argumentative logic and his refined construction...
In this paper an alternative approach to the commonly used loadline construction for the analysis of circuits utilizing the series connection of resonant tunneling diodes (RTDs) is presented. The discussed method is explained by the example of the mono- and bistable transition logic element (MOBILE), which today is one of the most promising logic circuits in nanoelectronics. First, it will be shown...
This research presented a geometric CAPTCHA which was not created from images in any database, but it is an image of a geometric shape that randomly generated from a program and its edge was incomplete. Geometric CAPTCHAs were tested with users to identify the number of angles from a shape and to do a simple calculation. Users must type a right answer to pass the CAPTCHA test. Geometric CAPTCHAs were...
This paper presents microcantilever fabrication on {100} oriented Si substrate using bulk micromachining technique. Detailed characteristics of convex corner compensation design for 〈100〉 oriented beam for two etching solutions: 25 wt. % TMAH and 30 wt. % KOH water solutions at 80 oC are given.
Superresolution from plenoptic cameras or camera arrays is usually treated similarly to superresolution from video streams. However, the transformation between the low-resolution views can be determined precisely from camera geometry and parallax. Furthermore, as each low-resolution image originates from a unique physical camera, its sampling properties can also be unique. We exploit this option with...
There are significant challenges in obtaining a controlled and consistent remaining silicon thickness (RST) above through silicon vias (TSVs) because of the need to support the thin device wafer, which will often be thinned to less than 100 microns during grinding, by bonding it to a full thickness support wafer made of either silicon or glass. Because grinding systems tend to grind flat surfaces,...
The sputter-deposited Cu thin film, coated with a thinner gold layer, was prepared into the butterfly pattern with alternating zones beween Cu thin film and Si. The eutectic SnPb solder balls with different sizes were reflowed on the butterfly pattern. As a result, the liquid solder would be selectively retained on the Au/Cu film zones. At the same time, under the energy minimization control, the...
In this paper a moldless stack dispensing method to form an LED lens at the wafer level is presented. This method uses a dispensing process to form a lens with high H/L ratio, where H and L stand for the height and the base length of the lens. Silicon wafer is used as the substrate. V-groove trenches are made on the surface of the wafer to define the size of the substrates. In the dispensing process...
Heat accumulation has become an important cause for the degradation of high power LEDs, and micro-channel cooler (MCC) is believed to be a promising solution for this issue. In this paper, a 3D transient heat transfer finite element model was established to investigate the cross-section shape and material of the MCC on cooling performance of high power LED chips. For comparison, three cross-section...
A novel graph-based optimal segmentation method which can simultaneously segment multiple star-shaped surfaces is presented in this paper. Minimum and maximum surface distance constraints can be enforced between different surfaces. In addition, the segmented surfaces are ensured to be smooth by incorporating surface smoothness constraints which limit the variation between adjacent surface voxels....
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