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Materials Science and Engineering Commons™
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- Semiconductor laser (2)
- 2. ENGINEERING AND TECHNOLOGY (1)
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- Construction engineering (1)
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- Local Authority Housing Stock Aggregation Retro fit Archetype fuel poverty. (1)
- Longitudinal spatial hole burning (LSHB) (1)
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Articles 1 - 4 of 4
Full-Text Articles in Materials Science and Engineering
Technology, Science, And Environtmental Impact Of A Novel Cu-Ag Core-Shell Solderless Interconnect System, Milea Joy Kammer
Technology, Science, And Environtmental Impact Of A Novel Cu-Ag Core-Shell Solderless Interconnect System, Milea Joy Kammer
Open Access Dissertations
Tin-based solder is ubiquitous in microelectronics manufacturing and plays a critical role in electronic packaging and attachment. While manufacturers of consumer electronics have made the transition to the use of lead-free solder, there are still a variety of reliability issues associated with these lead-free alternatives, particularly for high performance, high reliability applications. Because of these performance short-comings, researchers are still searching for a material, an alloy, or a unique alternative that can meet the thermal, mechanical, and electrical requirements for conventional reflow solder applications. In an effort to produce a more reliable alternative, Kim et al. proposed the low-temperature (200°C) …
Fabrication And Characterization Of Edge-Emitting Semiconductor Lasers, Junyeob Song
Fabrication And Characterization Of Edge-Emitting Semiconductor Lasers, Junyeob Song
Graduate Theses - Physics and Optical Engineering
The semiconductor laser was invented in 1962, and has recently become ubiquitous in modern life. This thesis focuses on the development of a semiconductor laser fabricating process which utilizes semiconductor manufacturing technology in a cleanroom environment including photolithography, etching, deposition, and bonding processes. A photomask for patterning is designed, recipes of photolithography process and etching process are developed with experiments. This work gives how to develop the process of fabrication and determine the parameters for each processes. A series of semiconductor laser devices are then fabricated using the developed process and characterization is performed to assess device performance with industrial …
Calculation And Experimental Verification Of Longitudinal Spatial Hole Burning In High-Power Semiconductor Lasers, Ting Hao
Graduate Theses - Physics and Optical Engineering
Longitudinal spatial hole burning (LSHB) is believed to be one of the limiting factors in scaling the output power of high-power semiconductor lasers. In this work, a self-consistent simulation of LSHB was performed to investigate the non-uniform longitudinal photon density distribution, carrier density distribution, and gain distribution in a high-power semiconductor laser. The calculation is based on a modification to the semiconductor laser rate equations and solved using a finite difference approach, with Newton’s method employed to numerically solve the differential equations. The impact of LSHB on output power was analyzed with different parameters, including injection current, cavity length, and …
Stock Aggregation Model And Virtual Archetype For Large Scale Retrofit Modelling Of Local Authority Housing In Ireland, James Pittam, Paul D. O’Sullivan, Garrett O’Sullivan
Stock Aggregation Model And Virtual Archetype For Large Scale Retrofit Modelling Of Local Authority Housing In Ireland, James Pittam, Paul D. O’Sullivan, Garrett O’Sullivan
Conference Papers
Developing representative archetypes using a bottom up approach for stock modelling is an excellent tool for evaluating the overall performance of the building stock; however it requires detailed analysis of the various building types. Currently there is no detailed housing data base for Local Authority housing in Cork City, Ireland that catalogues the housing stocks geometric properties and thermal characteristics for each typology. This study details a methodology to catalogue the LAH stock and build a detailed housing data base. The GIS web based mapping application Google Street View is used to identify 20 house typologies across 36 LAH developments; …