Effects of the Combined Exposure of Silicon to Beams of Low-Energy Argon Ions and Halogen-Containing Molecules

1984 ◽  
Vol 38 ◽  
Author(s):  
A. W. Kolfschoten
Keyword(s):  
Experimental Data ◽  
Ion Beam ◽  
Surface Region ◽  
Ion Bombardment ◽  
Low Energy ◽  
Reactive System ◽  
Combined Exposure ◽  
Si Substrate ◽  
Model Based ◽  
Argon Ions

AbstractThis paper reviews our results of modulated ion beam studies of the ion-assisted etching of Si. It is shown that the experimental data of the Si(C12, Ar+) reactive system can be described by a model based upon an ion-bombardment induced amorphousness of the Si substrate and the formation of a mixed surface region of several atomic layers of chlorine, argon and silicon. It is also shown that the model is in general agreement with the experimental data of the Si(XeF2, Ar+) and C(H, Ar+) systems.

Modification Of Properties Of Ion-Beam-Sputtered Yttrium-Oxide Thin Films By Low-Energy Ion Bombardment

1991 ◽  
Vol 223 ◽  
Author(s):  
K. A. Klemm ◽  
L. F. Johnson ◽  
M. B. Moran
Keyword(s):  
Yttrium Oxide ◽  
Ion Beam ◽  
Ion Bombardment ◽  
Low Energy ◽  
Ion Energy ◽  
Deposited Energy ◽  
Current Densities ◽  
Argon Ions ◽  
Substrate Temperatures ◽  
Argon Content

ABSTRACTThe effect of low-energy ion bombardment on ion-beam-sputtered yttrium-oxide films was studied. Yttria films were subjected to argon ions accelerated by a potential of up to 500 V with current densities of up to 8 μA/cm2 and were deposited at differing substrate temperatures. Yttria films bombarded during deposition were found to be amorphous, and trends observed with increased ion energy include reduced amount of residual compressive stress, increased argon content, and decreased refractive index, depending on deposited energy and substrate temperature.

Low Energy Ion Beam Modification of High Performance Polymer

1991 ◽  
Vol 236 ◽  
Author(s):  
Hyo-Soo Jeong ◽  
R. C. White
Keyword(s):  
High Performance ◽  
Ion Beam ◽  
Surface Region ◽  
Low Energy ◽  
Chemical Compositions ◽  
Interface Chemistry ◽  
Damage Level ◽  
Ion Beam Modification ◽  
Control Interface ◽  
High Performance Polymer

AbstractIon beam modification of polyimide (PI) by low energy and surface analysis were performed using XPS. The surface chemistry was monitored as a function of ion dose. The results indicate that even low energy ion beam (LEIB) induces a drastic change in chemical compositions on the PI surface, and the modification begins to occur at the onset of beam treatment, contrary to previous observations. Damage level is severely restricted to surface region. It is also proven that LEIB modification is a direct way to control interface chemistry.

Low Energy Ion Beam Modification of High Performance Polymer

1991 ◽  
Vol 235 ◽  
Author(s):  
Hyo-Soo Jeong ◽  
R. C. White
Keyword(s):  
High Performance ◽  
Ion Beam ◽  
Surface Region ◽  
Low Energy ◽  
Chemical Compositions ◽  
Interface Chemistry ◽  
Damage Level ◽  
Ion Beam Modification ◽  
Control Interface ◽  
High Performance Polymer

ABSTRACTIon beam modification of polyimide (PI) by low energy and surface analysis were performed using XPS. The surface chemistry was monitored as a function of ion dose. The results indicate that even low energy ion beam (LEIB) induces a drastic change in chemical compositions on the PI surface, and the modification begins to occur at the onset of beam treatment, contrary to previous observations. Damage level is severely restricted to surface region. It is also proven that LEIB modification is a direct way to control interface chemistry.

Gas Cluster Ion Beam Technology for Nano-Fabrication

2012 ◽  
Vol 82 ◽  
pp. 1-8
Author(s):  
Noriaki Toyoda ◽  
Isao Yamada
Keyword(s):  
Ion Beam ◽  
Surface Region ◽  
Local Area ◽  
Industrial Applications ◽  
Ion Beams ◽  
Low Energy ◽  
Cluster Ions ◽  
Nano Fabrication ◽  
Cluster Ion ◽  
Gas Cluster Ion Beam

A gas cluster is an aggregate of a few to several thousands of gaseous atoms or molecules, and it can be accelerated to a desired energy after ionization. Since the kinetic energy of an atom in a cluster is equal to the total energy divided by the cluster size, a quite-low-energy ion beam can be realized. Although it is difficult to obtain low-energy monomer ion beams due to the space charge effect, equivalently low-energy ion beams can be realized by using cluster ion beams at relatively high acceleration voltages. Not only the low-energy feature but also the dense energy depositions at a local area are important characteristics of the irradiation by gas cluster ions. All of the impinging energy of a gas cluster ion is deposited at the surface region, and this dense energy deposition is the origin of enhanced sputtering yields, crater formation, shockwave generation, and other non-linear effects. GCIBs are being used for industrial applications where a nano-fabrication process is required. Surface smoothing, shallow doping, low-damage etching, trimming, and thin-film formations are promising applications of GCIBs. In this paper, fundamental irradiation effects of GCIB are discussed from the viewpoint of low-energy irradiation, sputtering, and dense energy depositions. Also, various applications of GCIB for nano-fabrications are explained.

Ion Beam Surface Modification for Achieving Rectification in Gold-Aluminum Nitride-Silicon Junctions

1993 ◽  
Vol 316 ◽  
Author(s):  
T. Stacy ◽  
B. Y. Liaw ◽  
A. H. Khan ◽  
G. Zhao ◽  
E. M. Charlson ◽  
...  
Keyword(s):  
Aluminum Nitride ◽  
Ion Beam ◽  
Single Crystal Silicon ◽  
Ion Bombardment ◽  
Low Energy ◽  
Silicon Substrates ◽  
Scanning Electron Micrographs ◽  
Electrical Measurements ◽  
Crystal Silicon ◽  
Beam Surface

ABSTRACTLow energy ion bombardment has been utilized to fabricate rectifying contacts on aluminum nitride grown on single crystal silicon substrates. Bombardment of aluminum nitride with methane was followed by sputter deposition of gold contacts. To our knowledge, this is the first report of rectifying contact formation on aluminum nitride. Scanning electron micrographs show that the initially ordered aluminum nitride surface is significantly altered with low energy methane ion beam exposure. Electrical measurements made on samples which had been partially masked during implantation indicate that rectification is a result of the ion bombardment.

Simulations of Low-Energy Ion Bombardment and Epitaxial Growth

1991 ◽  
Vol 236 ◽  
Author(s):  
E. Chason ◽  
P. Bedrossian ◽  
J.Y. Tsao ◽  
B.W. Dodson ◽  
S.T. Picraux
Keyword(s):  
Epitaxial Growth ◽  
Ion Beam ◽  
Ion Bombardment ◽  
High Energy ◽  
Low Energy ◽  
High Energy Electron ◽  
Preferential Sputtering ◽  
Surface Vacancy ◽  
Atomic Coordination ◽  
Primary Interaction

AbstractWe have performed computer simulations of epitaxial growth and low-energy ion bombardment for comparison with reflection high-energy electron diffraction (RHEED) mesurements. The simulations are based on a hybrid Monte Carlo/rate equation approach which includes the processes of defect creation (adatom and surface vacancy), surface diffusion, and attachment and detachment from steps and islands. In this work, we focus on simulating the experimental observations of ion-induced RHEED oscillations and cancellation of RHEED oscillations during simultaneous ion bombardment and growth. For the interaction of the low-energy ion with the surface, we consider two mechanisms: preferential sputtering (where the sputtering cross section depends on the atomic coordination) and mobile vacancies. Our results indicate that the primary interaction of the ion beam with the surface is probably through the creation of mobile vacancies, and that the degree of preferential sputtering is not large.

An ion beam deceleration lens for ultra-low-energy ion bombardment of naked DNA

2013 ◽  
Vol 307 ◽  
pp. 618-623 ◽  
Author(s):  
P. Thopan ◽  
K. Prakrajang ◽  
P. Thongkumkoon ◽  
D. Suwannakachorn ◽  
L.D. Yu
Keyword(s):  
Ion Beam ◽  
Ion Bombardment ◽  
Low Energy ◽  
Naked Dna ◽  
Deceleration Lens
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