Tdk Corporation

Other

Semiconductor Energy Laboratory Co., Ltd.

Tatsuji Sano

Toru Nonami

Kazuo Nishi

Hisao Morooka

Sadami Tsutsumi

Masahiro Fukuma

Tetsuo Urabe

Masahito Furukawa

Masaru Nanao

Kenta Ishii

Tomohisa Azuma

Chihiro Takahashi

A piezoelectric ceramic sputtering target containing a perovskite type oxide represented by chemical formula (I) of ABOas a main component, wherein the component A of the chemical formula (I) contains at least K (potassium) and/or Na (sodium), the component B of the chemical formula (I) contains at least one selected from the group consisting of Nb (niobium), Ta (tantalum) and Zr (zirconium) with Nb (niobium) as a necessity, the piezoelectric ceramic sputtering target is composed of a plurality of crystal grains and grain boundaries existing among the crystal grains, and in the grain boundary, the molar ratio of at least one of Nb (niobium), Ta (tantalum), and Zr (zirconium) in the B components is higher than the molar ratio in the interior of the crystal grains by 30% or more.

Piezoelectric ceramic sputtering target, lead-free piezoelectric thin film and piezoelectric thin film element using the same

In a photovoltaic element according to the present invention, a first transparent conductive film, a second transparent conductive film, a p-type semiconductor film, an intrinsic semiconductor layer, a n-type semiconductor layer and a backside electrode are stacked in turn on a transparent substrate. Then, an intermediate layer is provided between the second transparent conductive film and the p-type semiconductor layer so as to cover the first transparent conductive film and the second transparent conductive film.

Method for manufacturing a photovoltaic element

Photovoltaic element

A living tissue replacement of crystallized glass having bioaffinity and mechanical strength is briefly obtained simply by pressure molding or machining without using a special equipment. A glass material having a softening point below its crystallization temperature and exhibiting viscous flow at temperatures below its melting point is heated at a temperature above its Tg and pressed at the temperature to mold to a desired shape, thereby manufacturing a living tissue replacement such as a dental crown. Molding can be done under a pressure of up to 20 MPa.

Glass material for preparing living tissue replacement

Method for preparing a molded glass material for use in the manufacture

Glass material, living tissue replacement, and orthodontic part

Growing community of inventors

Narita, Japan

Tatsuji Sano