Transient enhanced diffusion during rapid thermal annealing of boron implanted silicon

1985 ◽  
Vol 47 (12) ◽  
pp. 1321-1323 ◽  
Author(s):  
K. Cho ◽  
M. Numan ◽  
T. G. Finstad ◽  
W. K. Chu ◽  
J. Liu ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Enhanced Diffusion ◽  
Transient Enhanced Diffusion

High Performance 0.2 µm Dual Gate Complementary MOS Technologies by Suppression of Transient-Enhanced-Diffusion using Rapid Thermal Annealing

1998 ◽  
Vol 37 (Part 1, No. 3B) ◽  
pp. 1054-1058 ◽  
Author(s):  
Yukio Nishida ◽  
Hirokazu Sayama ◽  
Satoshi Shimizu ◽  
Takashi Kuroi ◽  
Akihiko Furukawa ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
High Performance ◽  
Enhanced Diffusion ◽  
Transient Enhanced Diffusion ◽  
Dual Gate

Rapid Thermal Annealing in Si

1984 ◽  
Vol 35 ◽  
Author(s):  
T.E. Seidel ◽  
C.S. Pai ◽  
D.J. Lischner ◽  
D.M. Maher ◽  
R.V. Knoell ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Removal Rate ◽  
Round Robin ◽  
Limiting Factor ◽  
Enhanced Diffusion ◽  
Transient Enhanced Diffusion

ABSTRACTCertain aspects of Rapid Thermal Annealing (RTA) are reviewed. Temperature considerations are discussed. The implant disorder removal rate is measured (5eV removal energy for As induced damage). Shallower defect-free junctions are obtained using RTA. Results of a ”Round Robin”-RTA annealing are presented, transient enhanced diffusion is not prominent for As. New results for the concentration enhanced diffusion of As are presented. Diffusion from the channeling-tai1 region of shallow boron diffusions is noted as a limiting factor for producing shallow p+-junctions. Other issues are briefly discussed.

scholarly journals Transient Enhanced Diffusion and Gettering of Dopants in Ion Implanted Silicon

1984 ◽  
Vol 36 ◽  
Author(s):  
S. J. Pennycook ◽  
J. Narayan ◽  
R. J. Culbertson
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Solid Phase ◽  
Subsequent Annealing ◽  
Dislocation Loops ◽  
Enhanced Diffusion ◽  
Transient Enhanced Diffusion ◽  
Dopant Profile ◽  
Dopant Atoms ◽  
Ion Implanted

ABSTRACTWe have studied in detail the transient enhanced diffusion observed during furnace or rapid-thermal-annealing of ion-implanted Si. We show that the effect originates in the trapping of Si atoms by dopant atoms during implantation, which are retained during solid-phase-epitaxial (SPE) growth but released by subsequent annealing to cause a transient dopant precipitation or profile broadening. The interstitials condense to form a band of dislocation loops located at the peak of the dopant profile, which may be distinct from the band formed at the original amorphous/crystalline interface. The band can develop into a network and effectively getter the dopant. We discuss the conditions under which the various effects may or may not be observed, and discuss preliminary observations on As+ implanted Si.

Ultra-Shallow Junctions by Ion Implantation and Rapid Thermal Annealing: Spike-Anneals, Ramp Rate Effects

1999 ◽  
Vol 568 ◽  
Author(s):  
Aditya Agarwal ◽  
Hans-J. Gossmann ◽  
Anthony T. Fiory
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Driving Forces ◽  
Recent Experimental Data ◽  
Enhanced Diffusion ◽  
Temperature Ramp ◽  
Rate Effects ◽  
Low Energies ◽  
Ultra Shallow Junctions ◽  
P Type

ABSTRACTOver the last couple of years rapid thermal annealing (RTA) equipment suppliers have been aggressively developing lamp-based furnaces capable of achieving ramp-up rates on the order of hundreds of degrees per second. One of the driving forces for adopting such a strategy was the experimental demonstration of 30nm p-type junctions by employing a ramp-up rate of ≈400°C/s. It was subsequently proposed that the ultra-fast temperature ramp-up was suppressing transient enhanced diffusion (TED) of boron which results from the interaction of the implantation damage with the dopant. The capability to achieve very high temperature ramp-rates was thus embraced as an essential requirement of the next generation of RTA equipment.In this paper, recent experimental data examining the effect of the ramp-up rate during spike-and soak-anneals on enhanced diffusion and shallow junction formation is reviewed. The advantage of increasing the ramp-up rate is found to be largest for the shallowest, 0.5-keV, B implants. At such ultra-low energies (ULE) the advantage arises from a reduction of the total thermal budget. Simulations reveal that a point of diminishing return is quickly reached when increasing the ramp-up rate since the ramp-down rate is in practice limited. At energies where TED dominates, a high ramp-up rate is only effective in minimizing diffusion if the implanted dose is sufficiently small so that the TED can be run out during the ramp-up portion of the anneal; for larger doses, a high ramp-up rate only serves to postpone the TED to the ramp-down duration of the anneal. However, even when TED is minimized at higher implant energies via high ramp-up rates, the advantage is unobservable due to the rather large as-implanted depth. It appears then that while spike anneals allow the activation of ULE-implanted dopants to be maximized while minimizing their diffusion the limitation imposed by the ramp-down rate compromises the advantage of very aggressive ramp-up rates.

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