Matsushita Electric Industrial Co., Ltd.

Other

Matsushita Electrical Industrial Co., Ltd.

Shintaro Hara

Takahiro Komatsu

Akira Gyoutoku

Hideaki Iwanaga

Tadahisa Sato

Takanori Nakano

Kazuo Nishimura

Shogo Matsubara

Hiroyuki Matsuo

Masakazu Tanahashi

Masaichiro Tatekawa

Takeshi Kamada

Kei Sakanoue

Isaku Kanno

Osamu Watanabe

Hiroshi Nakashima

Takafumi Hamano

Kazunari Chikanawa

Toshiyuki Matsunaga

Akira Gyotoku

Dawei Gao

Katsunori Muraoka

Katsuhiko Furukawa

Chiharu Wakamatsu

A piezoelectric actuator is constructed by forming a common electrodeof Cr, a piezoelectric layerof Pb(Zr,Ti)O, a cover layerof BaTiO, and an individual electrodeof Pt in this order into a laminate. The thickness of the piezoelectric layerin the lamination direction (T) and the thickness of the cover layerin the lamination direction (T) satisfy the relationship of 0.08&#x2266;T/T&#x2266;1. The relative dielectric constant of the piezoelectric layer(&#x3b5;r) and the relative dielectric constant of the cover layer(&#x3b5;r) satisfy the relationship of &#x3b5;r/&#x3b5;r

Piezoelectric actuator and ink-jet head, and ink-jet recorder

In a piezoelectric element comprising a first electrodeprovided on a substrate, a piezoelectric materialprovided on the first electrodeand a second electrodeprovided on the piezoelectric material, the piezoelectric materialis configured so as to have a perovskite type crystal structure which is represented by a formula ABOand in which the main component for the A site is Pb and the main components for the B site are Zr, Ti and Pb, and configured so that a ratio of Pb atoms to all atoms in the B site is more than 3% and not more than 30%. Namely, the piezoelectric materialis formed so as to contain Pb excessively and the excess Pb atoms are activated to be Pbduring formation of the piezoelectric materialand then introduced into the B site.

Piezoelectric body, manufacturing method thereof, piezoelectric element having the piezoelectric body, inject head, and inject type recording device

A ferroelectric element is described which has a structure including a common electrodea ferroelectric filmformed on the common electrodean individual electrodeformed on the ferroelectric filma lead wirefor feeding electric power to the individual electrodewhich is formed on the same plane as of the individual electrodeand a protection filmentirely covering the exposed parts of the ferroelectric filmand the individual electrodeand covering the lead wireThe protection filmis preferably made of a material whose Young's modulus is smaller than that of the ferroelectric filmexactly 1/20 or smaller of the Young's modulus of the ferroelectric filmFurther, the ferroelectric film is formed with the insulation reinforcing film containing at least one of the elements constituting the ferroelectric film.

Ferroelectric element and actuator using the same, and ink jet head and ink jet recording device

Electrically functional electronic device including an organic electroluminescence device is protected with a dense protective film, e.g. a silicon oxynitride film, formed on at least one part of the outer surface of the device at a low temperature by ECR plasma sputtering can prevent permeation of moisture, oxygen etc. into the device from the outside.

Electronic device and process for producing the same

An organic electroluminescence element comprising a substrate having provided thereon an anode for injecting holes, a cathode for injecting electrons, and at least one organic compound layer therebetween, wherein the organic compound layer contains at least one compound represented by formula (I), and at least one compound represented by formula (II), (III) or (IV) (definitions of formulas (I) to (IV) are described in the specification).

Organic electroluminescence element

The invention presents an organic electroluminescence element excellent in long-term durability and reliability, a manufacturing method excellent in mass producibility, and a display device using the organic electroluminescence element. Accordingly, to prevent growth of dark spots in the luminous layer by completely shutting off invasion of moisture or oxygen into an anode or an organic thin film layer, a shield material is adhered to an element by using low melting glass or low melting solder. To fuse the low melting glass or low melting solder used for this purposes, laser or ultrasonic wave is used. The surface of the element is sealed with a protective film in a film thickness of 3 microns to 30 microns, or a protective film composed of two-layer laminate film of insulating compound layer andmetal film. According to these inventions, a highly reliable organic electroluminescence element small in changes in the time course suchas growth of dark sports and lowering of luminance is obtained.

Organic electroluminescence element, its manufacturing method, and display device using organic electroluminescence element

An organic thin-film electroluminescent (organic EL) element having an improved luminescent efficiency and improved stability is described, which comprises a substrate and, formed thereover, an anode for injecting holes, a cathode for injecting electrons, and at least one organic-compound layer interposed between the anode and the cathode, wherein the organic-compound layer comprises, for example, any of the following organic compounds.

Organic electroluminescent element

An organic thin-film electroluminescent display device comprising a substrate, hole injection electrodes, an organic thin film layer, electron injection electrodes, an electrode-driving IC for driving the electron injection electrodes and the electron injection electrodes and lead wires for connecting the hole injection electrodes and the electron injection electrodes to the electrode-driving IC. The lead wires each include a lead underlayer made of the same material of the hole injection electrode and a lead electroconductive layer formed on the lead underlayer and having a higher electroconductivity than that of the lead underlayer and or the electron injection electrodes each may include an underlayer for the electron injection electrode and an electroconductive layer for the electron injection electrode formed on the underlayer for the electron injection electrode and having a higher electroconductivity than that of the underlayer for the electron. The device injection electrode can prevent fluctuations in luminescence brightness due to different ohmic losses of lead wires connecting the hole injection electrodes and the electron injection electrodes to the electrode-driving IC and due to different electric resistances of electron injection electrodes.

Organic thin-film electroluminescent display device, method for driving

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Fukuoka, Japan

Shintaro Hara