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Surface acoustic waves guided by a copper line embedded in a silica film on a silicon wafer were generated and detected optically using the laser-induced transient grating technique. Lines as narrow as ∼0.2μm yield a good signal despite the much larger size of the laser spot. The phase velocity of the guided mode is slightly lower than the surface acoustic wave velocity in the thin film structure...
We present our findings from a recent analysis of monitoring data collected on over 480 residential and commercial PV installations in Austin, Texas between 2005 and 2008. These systems were installed under a city rebate program administered by the city-owned electric utility, Austin Energy, and recognized under the Solar America initiative. The majority of these systems were residential installations...
We present examples of the application of Model- Based Infrared Reflectometry (MBIR) to metrology of trench-based power devices at different stages in the fabrication process. These metrology problems are similar to those encountered during the fabrication of deep trench memory devices, but pose some new challenges. We propose analysis methods that overcome the challenges and produce data useful for...
The products of the reaction of the most energetic form of hydrogen, gas phase H atoms, with ethylene, acetylene and ethane adsorbed on a Ni(111) surface at 60 K are probed. Adsorbed ethylidyne (CCH 3 ) is identified by high resolution electron energy loss spectroscopy to be the major product (30% yield) in all three cases. Adsorbed acetylene is a minor product (3% yield) and arises as a consequence...
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