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Patente US7704862 - Surface planarization of thin silicon films during and after processing by ... - Google PatentesB�squeda Im�genes Maps Play YouTube Noticias Gmail Drive M�s »Iniciar sesi�n B�squeda avanzada de patentesPatentesSystems and methods for reducing a surface roughness of a polycrystalline or single crystal thin film produced by the sequential lateral solidification process are disclosed. In one arrangement, the system includes an excimer laser for generating a plurality of excimer laser pulses of a predetermined...http://www.google.es/patents/US7704862?utm_source=gb-gplus-sharePatente US7704862 - Surface planarization of thin silicon films during and after processing by the sequential lateral solidification method B�squeda avanzada de patentes N�mero de publicaci�nUS7704862 B2Tipo de publicaci�nConcesi�n N�mero de solicitudUS 11/671,917 Fecha de publicaci�n27 Abr 2010 Fecha de presentaci�n6 Feb 2007 Fecha de prioridad21 Mar 2000TarifaPagadasTambi�n publicado comoUS6830993, US7220660, US20050032249, US20070145017 N�mero de publicaci�n11671917, 671917, US 7704862 B2, US 7704862B2, US-B2-7704862, US7704862 B2, US7704862B2 InventoresJames S. Im, Robert S. Sposili, Mark A. Crowder Cesionario originalThe Trustees Of Columbia UniversityExportar citaBiBTeX, EndNote, RefManCitas de patentes (100), Otras citas (97), Clasificaciones (30), Eventos legales (1) Enlaces externos: USPTO, Cesi�n de USPTO, EspacenetSurface planarization of thin silicon films during and after processing by the sequential lateral solidification methodUS 7704862 B2 Resumen Systems and methods for reducing a surface roughness of a polycrystalline or single crystal thin film produced by the sequential lateral solidification process are disclosed. In one arrangement, the system includes an excimer laser for generating a plurality of excimer laser pulses of a predetermined fluence, an energy density modulator for controllably modulating the fluence of the excimer laser pulses such that the fluence is below that which is required to completely melt the thin film, a beam homoginizer for homoginizing modulated laser pulses in a predetermined plane, a sample stage for receiving homoginized laser pulses to effect melting of portions of the polycrystalline or single crystal thin film corresponding to the laser pulses, translating means for controllably translating a relative position of the sample stage with respect to the laser pulses, and a computer for coordinating the excimer pulse generation and fluence modulation with the relative positions of the sample stage to thereby process the polycrystalline or single crystal thin film by sequential translation of the sample stage relative to the laser pulses.
8. The system of claim 7, wherein said beam homoginizer is operable to shape said laser pulses with a tophat profile in both the x and y directions, and wherein said translating means is operable to translate said polycrystalline or single crystal thin film in two directions orthogonal to a direction of said laser pulses, such that sequential homogenized laser pulses are incident on slightly overlapping regions of said polycrystalline or single crystal thin film in said two directions. Descripci�n
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