Seiko Epson Corporation

Qualcomm Incorporated

Seik Epson Corporation

Hong Qiu

Koji Sumi

Tsutomu Nishiwaki

Masato Shimada

Hiroyuki Kamei

Tetsushi Takahashi

Masanori Okuyama

Zhiqiang Wei

Soichi Moriya

Kouji Sumi

Souichi Moriya

Guomin Yang

Hong Cheng

Yang Yang

Ruiming Zheng

Yiqing Cao

Masami Murai

Michael Franco Taveira

Haruo Nakamura

Kazumasa Hasegawa

Tsutomu Nishikawa

Zhi Quiang Wei

Methods and systems for capturing notes on a mobile device include displaying a lock screen on the electronic display of the mobile device and operating the mobile device in an active interaction state provides write-only to a secure file on the mobile device and that that provides write-only access to the secure file on the mobile device. The mobile device may render user inputs on top of the lock screen in a user input area on the mobile device display for a period of time, use the write-only access to store the user inputs in the secure file, and cease rendering the user inputs in response to detecting expiration of the period of time or in response to detecting user inactivity.

System and method for capturing notes on a mobile device

Various aspects of the present disclosure generally relate to certificate based application descriptors for network slice selection. In some aspects, a user equipment (UE) may receive a first certificate associated with obtaining a network slice for executing an application. The UE may transmit, to a device, a request for the network slice with the first certificate, and receive an indication that the network slice is available to the UE for the application, based at least in part on the request. Numerous other aspects are provided.

Certificate based application descriptors for network slice selection

When a piezoelectric material is manufactured by hydrothermal method, the proper amount of lead contained in the piezoelectric film can be ensured and decreases in piezoelectric characteristics can be prevented. A method for manufacturing a piezoelectric material expressed by the formula ABO , containing an element &ldquo;a&rdquo; as the element expressed by A above, and having a perovskite crystal structure, comprises a first step of producing an oxide containing an element &ldquo;a&prime;&rdquo;, and a second step of producing a piezoelectric material by subjecting the oxide produced in the first step to a hydrothermal processing using an aqueous solution containing the element &ldquo;a&rdquo;, wherein the amount of the element &ldquo;a&rdquo;, contained in the piezoelectric material produced in the second step is increased over the amount of the element &ldquo;a&rdquo; contained in the oxide produced in the first step.

Piezoelectric element and method of manufacturing same

Provided is a method for manufacturing a piezoelectric element that has excellent piezoelectric characteristics and can be made into a thicker film. A piezoelectric thin film is crystallized by a process in which piezoelectric precursor films through containing the metal elements of a piezoelectric ceramic are coated with a material, dried, pyrolyzed, and then heat-treated under prescribed conditions in a diffusion furnace. With this method, a piezoelectric thin film can be made into a thicker film without initiating cracking.

Method for manufacturing piezoelectric element, and piezoelectric element, ink-jet recording head and printer

A method for manufacturing a piezoelectric element is disclosed. The method includes the steps of forming a lower electrode over a substrate, forming a piezoelectric luminous film over the lower electrode, forming an upper electrode over the piezoelectric film, forming a pressure luminous layer for emitting light upon application of pressure on the upper electrode, and attaching a substrate to the pressure luminous layer&mdash;has been inserted as a new abstract.

Method for manufacturing piezoelectric luminous element

A piezoelectric element having a piezoelectric film where the difference in the quantity of lead along the thickness of the film is minimized. The film is obtained by first applying, at least once, a first sol for use in forming a PZT film on a substrate having a lower electrode formed thereon. Second, applying a second sol having the greater lead content than the first sol. Third, subjecting these films to heat treatment at a predetermined temperature at least once. The second sol has a composition capable of forming a piezoelectric film having a Perovskite structure expressed generally by A B O , and the content of material constituting the A site of the first sol is greater than what constitutes the A site of the second sol.

Process for producing a piezoelectric element using a first SOL and a second SOL having a lead content greater than the first SOL

A process for the formation of an oxide ceramic thin film, which permits the control of film oxygen content and can give a film reduced in oxygen deficiency. The process is characterized in that the step of forming an amorphous thin film, the step of heating the thin film to crystallize it or the step of heat-treating the crystallized film is conducted in a moisture-containing atmosphere.

Method of forming oxide-ceramics film

When a piezoelectric material is manufactured by hydrothermal method, the proper amount of lead contained in the piezoelectric film can be ensured and decreases in piezoelectric characteristics can be prevented. A method for manufacturing a piezoelectric material expressed by the formula ABO , containing an element &ldquo;a&rdquo; as the element expressed by A above, and having a perovskite crystal structure, comprises a first step of producing an oxide containing an element &ldquo;a&prime;&rdquo;, and a second step of producing a piezoelectric material by subjecting the oxide produced in the first step to a hydrothermal processing using an aqueous solution containing the element &ldquo;a&rdquo;, wherein the amount of the element &ldquo;a&rdquo; contained in the piezoelectric material produced in the second step is increased over the amount of the element &ldquo;a&rdquo; contained in the oxide produced in the first step.

Method for manufacturing piezoelectric material

A piezoelectric actuator, comprising a stacked structure consisting of a top electrode , a piezoelectric film , and a bottom electrode , wherein the piezoelectric film comprises a first group of piezoelectric ceramic particles and a second group of piezoelectric ceramic particles. A distinctive feature is that the particles constituting the first group of piezoelectric ceramic particles are larger than the jingo particles constituting the second group of piezoelectric ceramic particles, and the first group of piezoelectric ceramic particles and the second group of piezoelectric ceramic particles have mutually different compositions. The piezoelectric actuator can thus be manufactured by an application method in a low-temperature environment, and a thicker piezoelectric film can be obtained. In addition, a highly practical piezoelectric film can be provided by combining the advantages of a plurality of material types.

Piezoelectric actuator, ink-jet type recording head, manufacturing method therefor, and ink-jet printer

A piezoelectric device having a crystallized piezoelectric film between a lower and an upper electrode, wherein the crystal axis of the columnar crystal grain with the (001) orientation in the crystal forming the piezoelectric film is inclined by a predetermined angle relative to the normal direction of the lower electrode face, thereby improving the electric/mechanic converting function under low voltage conditions.

Piezoelectric device, ink jet recording head, and methods of manufacturing said device and head

A piezoelectric actuator, made of a substrate and a piezoelectric film layer resistant to erosion is provided. The area of the piezoelectric actuator can be enlarged, and has a flat top surface. The present invention further provides an ink jet printing head, a printer, a method for manufacturing a piezoelectric actuator, and a method for manufacturing an ink jet printing head. The piezoelectric actuator includes a piezoelectric film disposed between a lower electrode and an upper electrode. Columnar crystal grains of piezoelectric ceramic which compose the piezoelectric actuator are random-oriented in a film thickness direction, and have a mean diameter in the range of 100 nm to 15,000 nm. The method for manufacturing the actuator includes the step of forming precursor films, which are composed of metal and oxygen, over a lower electrode, providing a hydrothermal treatment by dipping the precursor films in an alkaline solution, which as 2 M&lsqb;mol/l&rsqb; or less, more preferably 0.1 M&lsqb;mol/l&rsqb; or less, concentration of a given alkaline solute, and promoting the crystallization under certain conditions.

Piezoelectric actuator, ink jet printing head, printer, method for manufacturing piezoelectric actuator, and method for manufacturing ink jet printing head

The present invention provides a thin piezoelectric film having a high piezoelectric strain constant and a good adhesion with a lower electrode which can be produced without being cracked. The present invention also provides an ink jet recording head comprising this thin piezoelectric film as a vibrator. The thin piezoelectric film element of the present invention comprises a PZT film made of a polycrystalline substance, and an upper electrode and a lower electrode arranged with the PZT film interposed therebetween. The grain boundary of the crystalline constituting the PZT film is present almost perpendicular to the surface of the electrode. Further, the orientation of the crystalline constituting the PZT film is controlled to a desired range.

Thin piezoelectric film element, process for the preparation thereof and ink jet recording head using thin piezoelectric film element

The present invention provides a thin piezoelectric film having a high piezoelectric strain constant and a good adhesion with a lower electrode which can be produced without being cracked. The present invention also provides an ink jet recording head comprising this thin piezoelectric film as a vibrator. The thin piezoelectric film element of the present invention comprises a PZT film,made of a polycrystalline substance, and an upper electrode,and a lower electrode,arranged with the PZT film interposed therebetween. The grain boundary of the crystalline constituting the PZT film is present almost perpendicular to the surface of the electrode. Further, the orientation of the crystalline constituting the PZT film is controlled to a desired range.

Provided is a luminous element which utilizes a tribo-luminescence phenomenon. The luminous element comprises: a pressure luminous layer (,) which emits light upon the application of pressure; and a piezoelectric element which comprises a piezoelectric film (,) held between electrode films (,) and (,), and which is located so as to be capable of applying pressure on the pressure luminous layer.

Piezoelectric luminous element, display device and method for manufacturing same

A piezoelectric device for an ink jet print head that has a greater displacement at a low drive voltage. The ink-jet recording head includes a vibration plate, on which is mounted one or more piezoelectric devices that change the volumes of pressure chambers upon application of a voltage. The device is mounted at least on one face of a pressure chamber substrate that is to be filled with ink. Such piezoelectric device includes a second piezoelectric layer having a piezoelectric constant g of a constant value or higher; and a first piezoelectric layer having a dielectric constant of a specific value or higher. Since the piezoelectric constant d of the piezoelectric device correlates with the product of the largest piezoelectric constant g and the largest dielectric device of the piezoelectric devices, a piezoelectric constant d larger than in the conventional case, i.e., having a greater displacement, can be obtained.

Growing community of inventors

Beijing, China

Hong Qiu