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Operating Limits for Stable Growth of Silicon Fibers with Diameter Less Than 150 μm by Modified μ‐PD Method
Author(s) -
Epelbaum Boris M.,
Shimamura Kiyoshi,
Uda Satoshi,
Kon Junichi,
Fukuda Tsuguo
Publication year - 1996
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170310817
Subject(s) - materials science , silicon carbide , crucible (geodemography) , meniscus , silicon , micro pulling down , graphite , nozzle , fiber , composite material , microactuator , optoelectronics , optics , chemistry , mechanical engineering , electrical engineering , computational chemistry , physics , incidence (geometry) , engineering , actuator
The μ‐PD method originally developed for oxide crystals has been modified and applied for filamentary silicon crystal growth. Our main modification of μ‐PD method is concerned with an arrangement of melt permeable feeder which is inserted into the nozzle. The feeder finishes by a sharp tip the diameter of which (is almost the same as that of the desired semiconductor fiber, i.e., less than 150 μm. Silicon fibers were grown from the small liquid pool at the end of the feeder. Three types of crucible‐die arrangement were designed and tested. The best results were obtained with the help of inclined insert made of graphite fibers because of its ability to quench oscillations and longer operation life. Fiber crystals, 100 μm in diameter and 70 mm in length, have been grown successfully. Small meniscus stability, operating limits of μ‐PD method and silicon carbide formation during the growth process are discussed.