Non-stationary phase transitions in systems metallization of silicon structures

Non-stationary phase transitions in systems metallization of silicon structures We study the degradation of aluminum metallization under the thermal impact induced by rectangular current pulses with an amplitude of j < 8 × 1010 A/m2 and a length of τ < 800 μs and experimentally investigate the thermal degradation of a metal film under the action of phase transformations, specifically, metal fusion and contact melting in a metal-semiconductor system during the passage of current pulses with a power above the critical value P cr. It is demonstrated that the main mechanism of the fusion of a metallization stripe is related to heat release at the interface between the liquid and solid phases under the thermal impact. The velocities of liquid-phase propagation (10–50 m/s) along the metallization stripe have been determined in the experiment as a function of the electric power of the current pulse. The stresses in the silicon surface layers near the nonstationary heat source have been estimated. It is shown that current pulses with an electric power of ∼0.7P cr induce the stresses sufficient for the formation of dislocations. The formation of dislocation half-loops in the silicon surface layers near the thermal impact source upon the passage of current pulses with a specified power has been observed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Microelectronics Springer Journals

Non-stationary phase transitions in systems metallization of silicon structures

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Publisher
Pleiades Publishing
Copyright
Copyright © 2016 by Pleiades Publishing, Ltd.
Subject
Engineering; Electrical Engineering
ISSN
1063-7397
eISSN
1608-3415
D.O.I.
10.1134/S1063739716030082
Publisher site
See Article on Publisher Site

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