1991
DOI: 10.1063/1.105085
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Demonstration of laser-assisted epitaxial deposition of GexSi1−x alloys on single-crystal Si

Abstract: We report initial results of a novel technique for epitaxial growth of GexSi1−x alloys on single-crystal Si. During electron beam deposition of amorphous GexSi1−x, an incident XeCl excimer laser, operating at 308 nm with a 30 ns pulse duration, melts and crystallizes the amorphous layer in situ after each ≊5 nm of deposition. This laser-induced melt extends approximately 20 nm and provides epitaxy from the underlying substrate (or previous layers) at each stage of deposition. This melt/solidification process c… Show more

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Cited by 30 publications
(9 citation statements)
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“…A number of other epitaxial systems have been demonstrated, including plasma enhanced CVD, [21] sputtering, [22] and laser assisted growth. [23] For production lines, only CVD has to date demonstrated the quality, uniformity, and throughput required by companies for production. IBM has led the batch CVD process with a production tool allowing 25 or more 8 inch wafers to be processed in a fully qualified 0.25 mm BiCMOS (bipolar CMOS) process [24,25] and now has a number of products on the market.…”
Section: Si 1±x Ge X Epitaxial Growth Techniquesmentioning
confidence: 99%
“…A number of other epitaxial systems have been demonstrated, including plasma enhanced CVD, [21] sputtering, [22] and laser assisted growth. [23] For production lines, only CVD has to date demonstrated the quality, uniformity, and throughput required by companies for production. IBM has led the batch CVD process with a production tool allowing 25 or more 8 inch wafers to be processed in a fully qualified 0.25 mm BiCMOS (bipolar CMOS) process [24,25] and now has a number of products on the market.…”
Section: Si 1±x Ge X Epitaxial Growth Techniquesmentioning
confidence: 99%
“…Además, las distintas orientaciones del substrato Si(lll) y Si(100), suponen distintos valores de la densidad de dislocaciones siendo mayor para el primero de los casos. Esto se debe a la velocidad de recristalización, que desempeña un importante papel en la generación de dislocaciones, aumentando la densidad de éstas a medida que disminuye dicha velocidad (aproximadamente 0,7 m/s en el caso del Si (111) y alrededor de un orden de magnitud mayor en el Si (100)) (18).…”
Section: Discusión De Los Resultadosunclassified
“…Este, puede utilizarse para generar una modificación sobre un depósito ya realizado por otros métodos, o bien, emplearse en la realización del depósito y su posterior modificación. Dentro del segundo bloque, los dos procesos pueden ser simultáneos (5) o bien secuenciales (6)(7)(8). El presente trabajo se enmarcaría dentro de los últimos, siendo empleado el depósito químico en fase vapor asistido por láser (LCVD Láser Induced Chemical Vapour Deposition) con una posterior inducción a la epitaxia por medio de la técnica PLIE (Pulsed Láser Induced Epitaxy).…”
Section: Introductionunclassified
“…In this case, if the substrate is a crystalline solid and of better thermal conductivity than the coating, epitaxial growth will take place (19,26). This process, also known as PLIE, has first been described 20 years ago (27,28) using 308 nm Laser radiation and is schematically shown in figure 4. The energy density of the laser beam will determine the depth to which the substrate will be molten, thus the final composition of the alloy which is achieved by intermixing the elements in the molten pool.…”
Section: Theoretical and Experimental Detailsmentioning
confidence: 99%