Fujifilm Corporation

Yuuichi Okamoto

Takamichi Fujii

Takayuki Naono

Yukio Sakashita

Yoshikazu Hishinuma

Tsutomu Sasaki

Hiroki Sasaki

Yasukazu Nihei

Takami Arakawa

Ryoichi Nemori

Takayasu Yasuda

Takehiro Kasahara

Ryosuke Ozawa

Munenori Nakai

A piezoelectric device, including the following on a substrate in the order listed below: a lower electrode, a piezoelectric film which contains a Pb containing perovskite oxide represented by a general expression (P) below, and an upper electrode, in which the piezoelectric film has a layer of pyrochlore oxide on the surface facing the lower electrode, and the average layer thickness of the pyrochlore oxide layer is not greater than 20 nm.ABO&#x2003;&#x2003;(P)where, A: at least one type of A-site element containing Pb as a major component, B: at least one type of B-site element selected from the group consisting of Ti, Zr, V, Nb, Ta, Cr, Mo, W, Mn, Sc, Co, Cu, In, Sn, Ga, Zn, Cd, Fe, and Ni, and O: an oxygen element.

Piezoelectric device, piezoelectric device manufacturing method, and liquid discharge apparatus

Provided is a perovskite-type oxide film having a perovskite-type crystal structure and containing lead as a chief component, which, when subjected to Raman microspectroscopy at a plurality of points on a surface thereof so as to measure Raman spectra upon application of an electric field of 100 kV/cm and upon application of no electric field, has a mean of absolute values of peak shift amounts that is 2.2 cmor less, with the peak shift amounts being found between Raman spectra in a range of 500 to 650 cmmeasured upon application of an electric field of 100 kV/cm and Raman spectra in the range of 500 to 650 cmmeasured upon application of no electric field. A production process and an evaluation method for such a film as well as a device using such a film are also provided.

Perovskite-type oxide film, piezoelectric thin-film device and liquid ejecting device using perovskite-type oxide film, as well as production process and evaluation method for perovskite-type oxide film

A perovskite oxide is represented by a general formula ABOA represents at least one kind of metal element forming an A site, B represents at least one kind of metal element forming a B site. The B site includes at least one kind of metal element B1 selected from an element group consisting of the IV group elements and at least one kind of metal element B2 selected from an element group consisting of the V and VI group elements, and at least a part of the metal element B2 is of the 0 to +4 valence.

Perovskite oxide, electric element, piezoelectric actuator and liquid discharge system

A piezoelectric body contains a ferroelectric substance phase having characteristics such that, in cases where an applied electric field is increased from the time free from electric field application, phase transition of the ferroelectric substance phase to a ferroelectric substance phase of a different crystal system occurs at least two times. The piezoelectric body should preferably be actuated under conditions such that a minimum applied electric field Emin and a maximum applied electric field Emax satisfy Formula (1):Emin&#x3c;E1&#x3c;Emax&#x2003;&#x2003;(1)wherein the electric field Erepresents the electric field at which the first phase transition of the ferroelectric substance phase begins.

Piezoelectric body, piezoelectric device, and liquid discharge apparatus

It is disclosed a polymerizable composition for producing an optical member for 850 nm wavelength comprising: a polymerizable monomer composition and a compound, having a different refractive index from that of the polymerizable monomer composition, whose structure has a benzene ring substituted by a substituent having a Hammett value of not greater than 0.04 or by plural substituents having an average value of Hammett values thereof of not greater than 0.04. It is also disclosed a polymerizable composition for producing an optical member comprising a polymerizable monomer composition comprising at least one selected from the group consisting of Calicyclic (meth)acrylates and a compound, having a different refractive index from that of the polymerizable monomer composition and having a solubility parameter of not greater than 10.9, whose structure has a benzene ring substituted by the substituent or the substituents defined above.

Optical members and compositions for producing them

Growing community of inventors

Minami-ashigara, Japan

Yuuichi Okamoto