Wafer Extension for Cost-Effective Front to Back Side Alignment

2014 ◽  
Vol 27 ◽  
pp. 1-4
Author(s):  
S. Brabender ◽  
K. Kolander ◽  
K.T. Kallis ◽  
H.L. Fiedler
Keyword(s):  
Cost Effective ◽  
Back Side ◽  
Process Flow ◽  
Single Side ◽  
Additional Equipment ◽  
Mask Aligner ◽  
New Process ◽  
Alignment Process ◽  
Simple Possibility ◽  
Minimal Effort

This work presents a cost-effective and simple possibility to outperform the potential of a standard single side mask aligner. The limited functionality is extended to the capability of back side alignment with minimal effort without additional knowledge and integration of new process technologies. The whole presented process flow performs without the necessity of additional equipment as infrared back side wafer alignment kits or additional etching processes or clamps and brackets. The result is a front to back side alignment process with satisfactory deviation.

External Alignment Marks Technique for Front-to-Back Side Alignment Using Single-Side Mask Aligner

2017 ◽  
Vol 41 (6) ◽  
pp. 627-634 ◽  
Author(s):  
H. Abdollahi ◽  
F. Samaeifar ◽  
A. Afifi ◽  
M.R. Aliahmadi
Keyword(s):  
Back Side ◽  
Single Side ◽  
Mask Aligner ◽  
Alignment Marks

A New Deprocess Flow of Failure Analysis for MEMS Motion Sensor

2013 ◽  
Author(s):  
Chun-An Huang ◽  
Han-Yun Long ◽  
King-Ting Chiang ◽  
Li Chuang ◽  
Kevin Tsui
Keyword(s):  
Failure Analysis ◽  
Optical Microscopy ◽  
Motion Sensor ◽  
Thermal System ◽  
Layer By Layer ◽  
Sensor Failure ◽  
Process Flow ◽  
New Process ◽  
Cutting System ◽  
Successful Observation

Abstract This paper demonstrates a new de-process flow for MEMS motion sensor failure analysis, using layer by layer deprocessing to locate defect points. Analysis tools used in this new process flow include IR optical microscopy, thermal system, SEM and a cutting system to de-process of MEMS motion sensor and successful observation defect points.

Solar Thermophotovoltaic Converters Based on Tungsten Emitters

2006 ◽  
Vol 129 (3) ◽  
pp. 298-303 ◽  
Author(s):  
V. M. Andreev ◽  
A. S. Vlasov ◽  
V. P. Khvostikov ◽  
O. A. Khvostikova ◽  
P. Y. Gazaryan ◽  
...  
Keyword(s):  
Band Gap ◽  
High Efficiency ◽  
Radiation Spectrum ◽  
Cost Effective ◽  
Fresnel Lens ◽  
Photocurrent Density ◽  
Back Side ◽  
High Concentration ◽  
Emitter System ◽  
Solar Powered

Results of a solar thermophotovoltaic (STPV) system study are reported. Modeling of the STPV module performance and the analysis of various parameters influencing the system are presented. The ways for the STPV system efficiency to increase and their magnitude are considered such as: improvement of the emitter radiation selectivity and application of selective filters for better matching the emitter radiation spectrum and cell photoresponse; application of the cells with a back side reflector for recycling the sub-band gap photons; and development of low-band gap tandem TPV cells for better utilization of the radiation spectrum. Sunlight concentrator and STPV modules were designed, fabricated, and tested under indoor and outdoor conditions. A cost-effective sunlight concentrator with Fresnel lens was developed as a primary concentrator and a secondary quartz meniscus lens ensured the high concentration ratio of ∼4000×, which is necessary for achieving the high efficiency of the concentrator–emitter system owing to trap escaping radiation. Several types of STPV modules have been developed and tested under concentrated sunlight. Photocurrent density of 4.5A∕cm2 was registered in a photoreceiver based on 1×1cm2GaSb cells under a solar powered tungsten emitter.

Efficient Processing of Metal-Matrix-Composites by Combining Direct Pressure Sintering and Subsequent Thixoforging

2015 ◽  
Vol 825-826 ◽  
pp. 167-175
Author(s):  
Andreas Storz ◽  
Thomas Schubert ◽  
Thomas Weissgärber ◽  
Christoph Seyboldt ◽  
Kim Rouven Riedmüller
Keyword(s):  
Cost Effective ◽  
Special Importance ◽  
Matrix Composites ◽  
Homogeneous Microstructure ◽  
New Process ◽  
Direct Pressure ◽  
Efficient Processing ◽  
Near Net Shape ◽  
Semi Solid

The paper describes a cost effective and innovative combination of direct pressure sintering and subsequent thixoforming to produce MMC-components in (near-) net shape quality and, thus, to make these interesting materials attractive to mass production.First results of some combinations of aluminium matrix alloys with different ceramic reinforcements, consolidated by fast pressure sintering show the efficiency of this technology.The further processing of the consolidated billets has been performed by thixoforging. It can be shown, that the homogeneous microstructure from the direct pressure sintering stage with uniformly distributed ceramic reinforcements can be maintained over the semi-solid state and a full densification can be achieved. Form filling was complete and surface quality was comparable to forgings from conventional alloys.This new process flow shows advantages regarding the material yield in each of the processing steps. The (near-) net shape quality of thixoforged components allows a reduced effort for machining, which is of special importance for composite materials with a high content of wear resistant hard phases like SiC-particles.

scholarly journals Image georectification and feature tracking toolbox: ImGRAFT

2015 ◽  
Vol 4 (1) ◽  
pp. 23-34 ◽  
Author(s):  
A. Messerli ◽  
A. Grinsted
Keyword(s):  
Feature Tracking ◽  
Cost Effective ◽  
Time Lapse ◽  
Post Processing ◽  
Outlet Glacier ◽  
Use Of Time ◽  
Camera Systems ◽  
Wide Range ◽  
Oblique Images ◽  
Minimal Effort

Abstract. The use of time-lapse camera systems is becoming an increasingly popular method for data acquisition. The camera setup is often cost-effective and simple, allowing for a large amount of data to be accumulated over a variety of environments for relatively minimal effort. The acquired data can, with the correct post-processing, result in a wide range of useful quantitative and qualitative information in remote and dangerous areas. The post-processing requires a significant amount of steps to transform images into meaningful data for quantitative analysis, such as velocity fields. To the best of our knowledge at present a complete, openly available package that encompasses georeferencing, georectification and feature tracking of terrestrial, oblique images is still absent. This study presents a complete, yet adaptable, open-source package developed in MATLAB, that addresses and combines each of these post-processing steps into one complete suite in the form of an "Image GeoRectification and Feature Tracking" (ImGRAFT: http://imgraft.glaciology.net) toolbox. The toolbox can also independently produce other useful outputs, such as viewsheds, georectified and orthorectified images. ImGRAFT is primarily focused on terrestrial oblique images, for which there are currently limited post-processing options available. In this study, we illustrate ImGRAFT for glaciological applications on a small outlet glacier Engabreen, Norway.

3D system-in-package design using stacked silicon submount technology

2015 ◽  
Vol 32 (2) ◽  
pp. 63-72 ◽  
Author(s):  
Mingzhi Dong ◽  
Fabio Santagata ◽  
Robert Sokolovskij ◽  
Jia Wei ◽  
Cadmus Yuan ◽  
...  
Keyword(s):  
Cost Effective ◽  
Micro Electro Mechanical System ◽  
Wafer Level ◽  
Content Type ◽  
Package Design ◽  
Smart Lighting ◽  
Passive Devices ◽  
New Process ◽  
3D Stacking ◽  
The Cost

Purpose – This study aims to provide a flexible and cost-effective solution of 3D heterogeneous integration for applications such as micro-electro-mechanical system (MEMS) applications and smart sensor systems. Design/methodology/approach – A novel 3D system-in-package (SiP) based on stacked silicon submount technology was successfully developed and well-demonstrated by the fabrication and assembly process of a selected smart lighting module. Findings – The stacked module consists of multiple layers of silicon submounts which can be designed and fabricated in parallel. The bonding and interconnecting process is quite simple and does not require complicated equipment. The 3D stacking design offers higher silicon efficiency and miniaturized package form factor. The submount wafer can be assembled and tested at the wafer level, thus reducing the cost and improving the yield. Research limitations/implications – The embedding design presented in this paper is applicable for modules with limited number of passives. When it comes to cases with more passive devices, new process needs to be developed to achieve fast, inexpensive and reliable assembly. Originality/value – The presented 3D SiP design is novel for applications such as smart lighting, Internet of Things, MEMS systems, etc.

Use of aquatic plants to create fluctuating hypoxia in an experimental environment

2012 ◽  
Vol 63 (4) ◽  
pp. 351 ◽  
Author(s):  
Nicole Flint ◽  
Richard G. Pearson ◽  
Michael R. Crossland
Keyword(s):  
Aquatic Plants ◽  
Aquatic Macrophytes ◽  
Cost Effective ◽  
Freshwater Systems ◽  
Naturally Occurring ◽  
Experimental Environment ◽  
Cost Effective Method ◽  
Minimal Effort ◽  
Photosynthesis And Respiration ◽  
Behavioural Adaptations

In freshwater systems, dissolved oxygen (DO) saturation frequently fluctuates, falling at night and rising during the day in response to respiration and photosynthesis, respectively, of aquatic biota. Low DO (hypoxia) is a common cause of fish kills in freshwater systems around the world. Laboratory studies on responses of fish to fluctuating DO are currently limited, and require techniques that produce a realistic cycle of DO depletion and replacement. Artificial DO-depletion mechanisms frequently used for hypoxia studies may underestimate the field effects of hypoxia on fish because of the lack of the naturally occurring synergistic effect of lower pH, and seldom allow fish to employ behavioural adaptations to hypoxia, such as aquatic surface respiration. We demonstrate proof-of-principle for an alternative method of creating fluctuating hypoxia in an experimental environment, using the natural rhythms of photosynthesis and respiration of aquatic plants to create realistic conditions. A range of volumes of aquatic macrophytes were used alone and in combination with fish to lower DO saturation in sealed freshwater aquaria, and achieved DO saturations as low as 1.3%. This cost-effective method can be deployed over long periods with minimal effort in comparison to traditional methods of DO reduction.

scholarly journals Test Generation Algorithm for Fault Detection of Analog Circuits Based on Extreme Learning Machine

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Jingyu Zhou ◽  
Shulin Tian ◽  
Chenglin Yang ◽  
Xuelong Ren
Keyword(s):  
Extreme Learning Machine ◽  
Analog Circuits ◽  
Test Generation ◽  
Cost Effective ◽  
Fault Classification ◽  
The Novel ◽  
Analog Device ◽  
Generation Algorithm ◽  
New Process ◽  
Learning Machine

This paper proposes a novel test generation algorithm based on extreme learning machine (ELM), and such algorithm is cost-effective and low-risk for analog device under test (DUT). This method uses test patterns derived from the test generation algorithm to stimulate DUT, and then samples output responses of the DUT for fault classification and detection. The novel ELM-based test generation algorithm proposed in this paper contains mainly three aspects of innovation. Firstly, this algorithm saves time efficiently by classifying response space with ELM. Secondly, this algorithm can avoid reduced test precision efficiently in case of reduction of the number of impulse-response samples. Thirdly, a new process of test signal generator and a test structure in test generation algorithm are presented, and both of them are very simple. Finally, the abovementioned improvement and functioning are confirmed in experiments.

scholarly journals A Cost Effective Rapid Weld Technology Configuration

2020 ◽  
Vol 13 (1) ◽  
pp. 105-109
Author(s):  
Márk Laki ◽  
János Kuti
Keyword(s):  
Welded Joint ◽  
Cost Effective ◽  
Hardness Measurement ◽  
Steel Sheets ◽  
New Process

AbstractThe research focuses on determining the application parameters of a new process developed by Cloos. With the use of Cloos Rapid Weld technology (metal active gas welding), the authors carried out welding experiments on S235JR steel sheets (6 mm and 8 mm thick). The results of the welding experiments were verified by hardness measurement [1–3]. The goal is to establish one side one row suitable welded joint by the used technology.

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