Sharp Kabushiki Kaisha Corporation

Hirotaka Ohno

Yasunari Okamoto

Hironori Matsunaga

Yoshiharu Nakajima

Yoshiro Akagi

Hiroshi Taniguchi

Shinji Yamagami

Kazushi Yoshimura

Yoshiyuki Kitamura

Atsuhisa Inoue

Mariko Ishino

Jin Sakamoto

Kenji Takai

Hiroshi Yasumura

Shigeru Kaminishi

Koji Ohoka

Hideo Asahina

A Stirling engine, wherein when a linear motor reciprocatingly move a piston in a cylinder, a displacer also reciprocatingly moves in the cylinder storing the displacer. By this, working mixture moves between a compression space and an expansion space. Though a spring for generating resonance is combined with the displacer, a spring for generating resonance for the piston is eliminated. Gas bearings are installed for the piston at two or more positions at specified intervals in the axial direction. An inside flange formed at the end of the cylinder and a stopper plate fixed to the linear motor determine the moving limit of the piston. Since a pin projected from the stopper plate is received by a through hole in a magnet holder, the piston can be prevented from being rotated.

Stirling engine

A cation exchange polyimide resin having resistance to organic solvents which contains polyamidocarboxylic acid units providing sites of ion exchange and represented by the formula (I): ##STR1## wherein R.sup.1 is a tetravalent organic group, and R.sup.2 is a bivalent organic group, which is capable of trapping cations from organic solvents.

Cation exchange polyimide resin and use thereof

A method for evaluating a lithium niobate thin film includes measuring an absorption edge wavelength of a lithium niobate thin film and evaluating a lithium-to-niobium composition ratio of the thin film, and an apparatus for preparing a thin film including a thin film-forming body capable of controlling the lithium-to-niobium composition ratio of a lithium niobate thin film being formed and an evaluation device for evaluating the lithium-to-niobium composition ratio, the evaluation device being provided with a monitor substrate, an optical path for spectrometry, an ultraviolet ray source and a measurement part for measuring an absorption edge wavelength of the thin film.

Method for evaluating a lithium niobate thin film and apparatus for

A method of producing a ferroelectric thin film comprising the steps of evaporating metal Li or an oxide thereof as a Li source, metal Nb or an oxide thereof as a Nb source and metal Ta or an oxide thereof as a Ta source in a substantially oxygen gas plasma atmosphere while controlling the respective heating temperatures independently from each other and simultaneously depositing the Li, Nb and Ta on a substrate so as to obtain an LiNb.sub.1-x Ta.sub.x O.sub.3 (0&lt;x&lt;1) thin film which shows ferroelectricity.

Method of producing ferroelectric LiNb.sub.1-31 x Ta.sub.x O.sub.3

Growing community of inventors

Tenri, Japan

Hirotaka Ohno