The University of Tokyo

Mitsubishi Materials Corporation

Japan Science and Technology Agency

Yuichi Ikuhara

Naoya Shibata

Yoshiyuki Nagatomo

Nobuyuki Terasaki

Yoshirou Kuromitsu

Toshiyuki Nagase

Kazuhiro Akiyama

Akihito Kumamoto

Takahisa Yamamoto

Takehito Seki

Kousuke Ooe

An observation method using a scanning transmission electron microscope for scanning an electron beam over a specimen and detecting electrons transmitted through the specimen includes: acquiring results of detecting the electrons transmitted through the specimen using a segmented detector having detection regions disposed in a bright-field area; and generating segmented images based on the results of detecting the electrons in the detection regions, and applying filters determined based on a signal-to-noise ratio to the segmented images to generate a reconstructed image. The signal-to-noise ratio is proportional to an absolute value of a total phase contrast transfer function normalized by a noise level, the total phase contrast transfer function being defined by product-sum operation of phase contrast transfer functions expressed by complex numbers and weight coefficients for the detection regions. The filters for the detection regions are determined based on the weight coefficients that yield a maximum of the signal-to-noise ratio.

Observation method by means of scanning transmission electron microscope, scanning transmission electron microscope system, and computer readable medium

The present invention provides a ceramic-aluminum bonded body in which Mg-containing oxide having a spinel crystal structure are dispersed in an aluminum member within a range of 2 &#x3bc;m in a thickness direction from a bonded interface with a ceramic member, a segregated portion in which Mg, Si, and O is segregated is formed in the aluminum member in the vicinity of the bonded interface with the ceramic member, mass ratios of Mg, Si, and O between the segregated portion and a position spaced by 10 &#x3bc;m from the bonded interface toward an aluminum member side are within predetermined ranges, and the amount of Mg at the position spaced by 10 &#x3bc;m from the bonded interface toward the aluminum member side is 0.8 mass % or less.

Ceramic-aluminum conjugate, power module substrate, and power module

Disclosed is a ceramic or metal single-crystal material having high-density dislocations arranged one-dimensionally on respective straight lines. The single-crystal material is produced by compressing a ceramic or metal single-crystal blank at a high temperature from a direction allowing the activation of a single slip to induce plastic deformation therein, and then subjecting the resulting product to a heat treatment. The single-crystal material can be used in a device for high-speed dislocation-pipe diffusion of ions or electrons. The single-crystal material can further be subjected to a diffusion treatment so as to diffuse a metal element from its surface along the dislocations to provide a single-crystal device with a specific electrical conductivity or a quantum wire device. Otherwise, the single-crystal material can be subjected to annealing or chemical etching so as to form nano-holes along the high-density dislocations to provide a thin film device, such as a molecular sieve film or a carbon-dioxide separating film.

Single crystal material having high density dislocations arranged one-dimensionally in straight line form, functional device using said single crystal material, and method for their preparation

Growing community of inventors

Tokyo, Japan

Yuichi Ikuhara