摘要:
Provided is a method of preparing low-crystallinity oltipraz or amorphous oltipraz. The method includes: obtaining a mixed solution containing oltipraz and a water-soluble polymer or a water-insoluble polymer in a solvent, the solvent being an organic solvent or purified water; and solid-dispersing the oltipraz in the polymer. In the solid-dispersing, the mixed solution may be spray dried using a spray dryer or granulated using a fluid bed granulator.
摘要:
Disclosed herein is an actuator for an inkjet print head. The actuator includes a vibrating plate having a thin film structure and flexurally deformable in its thickness direction; a first etch stopper film laminated on one surface of the vibrating plate; a chamber plate laminated on the surface of the first etch stopper film opposite to the vibrating plate, and having a plurality of solution chambers formed therein and spaced apart from each other by a desired distance, the solution chambers having a width gradually larger from a middle portion and toward upper and lower portions; and a second etch stopper film laminated on the surface of the chamber plate opposite to the first etch stopper film, and including through holes therein, the through holes being formed such that they communicated vertically concentrically with the corresponding ones of the solution chambers, the through holes having a width smaller than that of the solution chambers. Therefore, the actuator is excellent in reproductivity of uniform solution chambers, and is increased in bonding area of the chamber plate to other plate structures and, therefore, is increased in bonding force of the channel plate. This allows a rigidity of the chamber plate to be increased while improving an ink jetting-out performance of the inkjet print head.
摘要:
A method for fabricating a microactuator for an inkjet head, which achieves easy formation of oxide piezoelectric elements and upper electrodes having desired patterns, using a patterning process mainly used in the fabrication of semiconductor devices. The method includes the steps of sequentially laminating a vibrating plate, a lower electrode, an oxide piezoelectric sheet, and an electrode layer, patterning the electrode layer, thereby forming upper electrodes of a desired pattern, and patterning the oxide piezoelectric sheet in accordance with an etching process while using the upper electrodes as a mask, thereby forming oxide piezoelectric elements of a desired pattern. Alternatively, the method includes the steps of sequentially laminating a lower electrode and an oxide piezoelectric sheet over a vibrating plate, patterning the oxide piezoelectric sheet in accordance with an etching process, thereby forming oxide piezoelectric elements of a desired pattern, depositing an electrode layer over the resulting structure, and patterning the electrode layer while using the piezoelectric elements as a mask, thereby forming upper electrodes of a desired pattern.
摘要:
Disclosed is an ink jet printer head actuator and a manufacturing method thereof. The ink jet printer head actuator comprises a vibrating plate, a portion of a plate surface of the vibrating plate being mechanically deformed by an external force; a chamber plate formed with a plurality of chambers, the chamber plate sucking and discharging ink into and out of the plurality of chambers by vibration of the vibrating plate; a protective thin film intervened between the vibrating plate and the chamber plate for preventing the vibrating plate from being etched when the plurality of chambers are formed in the chamber plate and for preventing the vibrating plate from being corroded by keeping ink in the plurality of chambers from being brought into contact with the vibrating plate; a plurality of piezoelectric elements attached to a surface of the vibrating plate for vibrating portions of the vibrating plate which correspond to the plurality of chambers, respectively, while being deformed in a lengthwise direction depending upon electric power supply; and a plurality of electrodes at least laminated on the plurality of piezoelectric elements for supplying electric power thereto, respectively.
摘要:
A laser diode package having an optical power monitoring function includes a monitor diode for monitoring an optical power of the light emitted from a laser diode. In the laser diode package, an optical member has a projection window for advancing the light emitted from the laser diode to a desired direction and a reflection surface from which the light emitted from the laser diode is reflected. The monitor diode receives the light reflected from the reflection surface of the optical member in order to monitor an optical power of the light emitted from the laser diode. A slot is installed on an area except for an optical path which is formed by the light projected via the projection window of the optical member, for shielding ambient light. Thus, the laser diode package having an optical power monitoring function prevents a mix-operation of the monitor diode due to the ambient light.
摘要:
A coaxial cable connector connects coaxial cables with each other is disclosed. The coaxial cable connector includes a tap terminal, a tap housing, a tap locking member, a receptacle housing, a receptacle terminal and a receptacle locking member. The tap terminal is connected to a first coaxial cable, and has a locking groove. The tap housing includes a protrusion fixedly held in the locking groove, and the tap terminal is inserted into the tap housing. The tap locking member is mounted on the tap housing to hold the tap terminal that is inserted into the tap housing. The receptacle housing is detachably coupled with the tap housing, and the receptacle terminal is inserted into the receptacle housing and connects the tap terminal with a second coaxial cable. The receptacle locking member is mounted on the receptacle housing to hold the receptacle terminal that is inserted into the receptacle housing.
摘要:
The present invention relates to the use of nucleic acid sequences for regulating the transcription and expression of genes, the novel promoters and expression units themselves, methods for altering or causing the transcription rate and/or expression rate of genes, expression cassettes comprising the expression units, genetically modified microorganisms with altered or caused transcription rate and/or expression rate, and methods for preparing biosynthetic products by cultivating the genetically modified microorganisms.
摘要:
A polyetherpolyol for use in production of polyurethane includes polyetherpolyol carbons having stereoregularity of syndiotactic triad. Further, a method of preparing such polyetherpolyol is provided. The polyurethane resulting from stereoregular polyetherpolyol is superior in physical properties to polyuretanes obtained by use of atactic polyetherpolyol.