Application of Maximum Entropy Method to Semiconductor Engineering

Yonamoto, Yoshiki

doi:10.3390/e15051663

Cited by 8 publications

(8 citation statements)

References 32 publications

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“…The importance of MEM reconstruction starting by ARXPS data, for example, in semiconductors field, was highlighted in the last years by Yonamoto 39 who applied MEM data processing not only to ARXPS data, but also to thermally stimulated current, isochronal annealing (IA), and thickness-dependent CV (cyclic voltammetry) data, proving that MEM allows an easy extraction of important information for understanding the physics of devices.…”

Section: Introductionmentioning

confidence: 99%

Nanostructure of Surface Films on Ni18P Alloy in Sulfate Solutions by the Maximum Entropy Method

et al. 2017

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NiP alloys are very often used in industry, due to their outstanding performance in corrosion and wear. Alloys with high phosphorus content (≥16 atom % P) are amorphous and show high corrosion resistance in both neutral and acidic solutions irrespective of the presence of chloride ions. The reason for this behavior is attributed to the formation of a “P-enriched surface layer” whose exact nature is still under debate. In this work, an iterative algorithm based on the application of maximum entropy method on nondestructive angle-resolved X-ray photoelectron spectroscopy data has been applied to the investigation of the surface layer grown on Ni18P alloys following mechanical polishing and anodic polarization in sulfate solutions. The results show that the outermost region of the examined alloy has a complex layered structure: (1) an uppermost hydrocarbon contamination layer about 1 nm thick, which includes also adsorbed water; (2) a nickel (poly)phosphate layer of about 1 nm; (3) a highly phosphorus-enriched interface being about 2 nm thick with a marked phosphorus concentration gradient, from 70 to 20 atom %; and (4) bulk alloy with the stoichiometric composition. These findings, together with the chemical state of the different phosphorus compounds, allow us to conclude that the high corrosion and wear resistance of NiP alloys might be ascribed to the presence of a thin, self-repairing nickel (poly)phosphate layer grown on a strongly P-enriched interface. Because the Auger parameter of P at the interface is similar to that of elemental P, it might be also concluded that the interface is enriched in elemental phosphorus

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Section: Introductionmentioning

confidence: 99%

Nanostructure of Surface Films on Ni18P Alloy in Sulfate Solutions by the Maximum Entropy Method

et al. 2017

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“…In physics, the particle distribution of maximum entropy corresponds to the macrostate that has the most microstates. The successes of the MaxEnt principle have been demonstrated in various applications in the study of condensed matters [12][13][14][15][16][17].…”

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confidence: 99%

Atomic Structure Modeling of Multi-Principal-Element Alloys by the Principle of Maximum Entropy

Wang

2013

Entropy

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Atomic structure models of multi-principal-element alloys (or high-entropy alloys) composed of four to eight componential elements in both BCC and FCC lattice structures are built according to the principle of maximum entropy. With the concept of entropic force, the maximum-entropy configurations of these phases are generated through the use of Monte Carlo computer simulation. The efficiency of the maximum-entropy principle in modeling the atomic structure of random solid-solution phases has been demonstrated. The bulk atomic configurations of four real multi-principal-element alloys with four to six element components in either BCC or FCC lattice are studied using these models.

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“…Experimentally it can be done by employing partial heating method as well as thermal cleaning method [1,4], and these are widely used. analyzing MIS capacitors with a structure of Al/SiaNb/Si, TSCs due to single electron de-trapping from single trap has been well discriminated [40].…”

Section: Development Of Tsc Technologymentioning

confidence: 99%

Research trend in thermally stimulated current method for development of materials and devices in Japan

Iwamoto

Taguchi

2018

Jpn. J. Appl. Phys.

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Thermally stimulated current (TSC) measurement is widely used in a variety of research fields, i.e., physics, electronics, electrical engineering, chemistry, ceramics, biology, etc. TSC is short circuit current and it flows due to displacement of charges in samples during heating. The TSC measurement is very simple, but TSC curves give much important information on charge behaviors. In 1970's, TSC measurement made a great contribution to the development of electrical insulation engineering, to the development of semiconductor device technology, and so forth. Accordingly, TSC experimental technique and its analytical method had advanced. On the other hand, during the past several ten years, many new molecules and advanced functional materials have been discovered and developed. Along with this situation, TSC measurement has attracted much attention in industries and in academic laboratories as a way for characterizing discovered new materials and devices. This review reports the latest research trend in TSC method for development of Materials and Devices in Japan.

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Application of Maximum Entropy Method to Semiconductor Engineering

Cited by 8 publications

References 32 publications

Nanostructure of Surface Films on Ni18P Alloy in Sulfate Solutions by the Maximum Entropy Method

Nanostructure of Surface Films on Ni18P Alloy in Sulfate Solutions by the Maximum Entropy Method

Atomic Structure Modeling of Multi-Principal-Element Alloys by the Principle of Maximum Entropy

Research trend in thermally stimulated current method for development of materials and devices in Japan

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