Abstract:
PURPOSE: A micro actuator using a shape memory alloy is provided to improve operational frequency of a composite thin film by minimizing heat stored in the composite thin film and a peripheral member. CONSTITUTION: A micro actuator includes a substrate(100) having a space section(101) and a vibration plate(130). The vibration plate(130) has a first thin film(110) formed on an upper surface of the substrate(100) so as to cover an upper portion of the space section(101), and a second thin film(120) formed on an upper surface of the first thin film(110). The second thin film(120) is made from a shape memory alloy. The vibration plate(130) is bent toward the space section(101) or in opposition to the space section(101).
Abstract:
An ink cartridge including a foam chamber generating negative pressure, with an air passage formed from an upper end thereof toward a lower end, an ink filter and an ink head. A part of a bottom of the foam chamber slopes down and the foam is disposed inside the foam chamber. An ink chamber storing ink is disposed at one side of the foam chamber and is divided from the foam chamber by a partition having a connecting opening connecting the ink chamber with the foam chamber. A cartridge cover closes upper ends of the ink chamber and foam chamber and has an ink inlet. The air passage is formed vertically and close to the partition and the air passage is disposed to slope such that a lower end thereof inclines toward the partition more than an upper end. Further, it is the connecting opening is formed at a lowest end of the partition and the ink filter is disposed at a position lower than the connecting opening.
Abstract:
PURPOSE: An ink cartridge is provided to prevent an air passage from being broken due to external force by forming the air passage between an outer cover and an inner cover. CONSTITUTION: An ink cartridge(100) includes an ink storage section(110), an inner cover(140) covering an upper portion of the ink storage section(110), an outer cover(170) for sealing the inner cover(140) and an intermediate member(160) installed between the inner cover(140) and the outer cover(170). The ink storage section(110) is divided into first and second chambers(114,116) by means of a partition(113). An ink path(118) is formed at a lower portion of the partition(113). The first chamber(114) is filled with ink and the second chamber(116) is provided therein with a foam member(120). An ink feeding pipe(122) is formed at a lower portion of the second chamber(116).
Abstract:
PURPOSE: A flexible printed circuit board is provided to reduce an inductance value of the flexible printed circuit board by aligning a grounding wire at both sides of a voltage feeding wire. CONSTITUTION: A flexible printed circuit board(200) includes a plurality of voltage feeding terminals(210), a plurality of grounding terminals(220), a plurality of signal terminals(230), a plurality of first wires(215), and a plurality of second wires(225). The first wires(215) are connected to the voltage feeding terminals(210) and the second wires(225) are connected to the grounding terminals(220). The first wires(215) electrically connect the voltage feeding terminals(210) to first bonding pads of a printer head(250) and the second wires(225) electrically connect the grounding terminals(220) to second bonding pads of the printer head(250).
Abstract:
A bubble-jet type ink-jet printhead has a structure in which a base plate, a barrier wall, and a nozzle plate are stacked. The base plate includes a substrate on which a recess is formed to a predetermined depth, an adiabatic layer formed on the substrate, a heater which is formed on the adiabatic layer and generates a thermal energy, and a passivation layer which is formed on the heater and passivates the heater. The barrier wall is stacked on the base plate, defines an ink chamber, which is disposed on the recess and has a recessed bottom surface, and defines an ink passage which communicates with the ink chamber. The nozzle plate is stacked on the barrier wall, has nozzles through which ink is ejected, and is formed at a location corresponding to a center of the ink chamber. Since a height of the barrier wall surrounding the ink chamber is reduced by the recess, delamination caused by ink soaked into the barrier wall can be prevented, and print performances such as a traveling property in a straight direction of ink droplets and ejection velocity of ink droplets, are improved.
Abstract:
PURPOSE: A monolithic bubble ink jet printer head and a method for manufacturing the same are provided to prevent uniformity between cells from being lowered by integrally forming a nozzle with a chamber using a photoresist. CONSTITUTION: A monolithic bubble ink jet printer head(100) includes a substrate(101), a first ink feeding path(102), and a chamber/nozzle plate(109). The substrate(101) is formed with a heater(106) for heating ink and a first protective layer(105) for protecting the heater(106). The first ink feeding path(102) forms an ink feeding passage passing through the substrate(101). The chamber/nozzle plate(109) is formed on the first protective layer(105) by pattering a photoresist(108) through a photolithography process. The first protective layer(105) formed on the heater(106) includes silicon nitride, or silicon carbide.
Abstract:
PURPOSE: An ink jet print head, a method for bonding an FPC cable of the ink jet print head and an apparatus having the same are provided to reduce a manufacturing time for the ink jet print head by shortening a bonding time of a conductor. CONSTITUTION: A substrate for an ink jet print head including resistance heaters, signal lines connected to the resistance heaters, and electric pads for connecting the signal lines to an external device is provided(91). Then, an FPC cable having a plurality of conductors is prepared(92). The conductors are formed with bonding sections corresponding to the pads. Then, a thermal-pressure type bonding device having a bonding tool is provided so as to heat the bonding sections in a state that the bonding sections are pressed on the pads of the substrate(93). The substrate is mounted on a stage(94). Then, bonding sections of the conductor are aligned corresponding to the pads. Then, the conductor is heated by using the bonding tool(96).
Abstract:
A method of manufacturing a monolithic ink-jet printhead includes a heating element which generates bubbles by heating ink is formed on a surface of the substrate, and a negative photoresist which is coated to a predetermined thickness on the substrate on which the heating element is formed. Next, a portion, which forms a sidewall of an ink passage forming wall surrounding an ink chamber and a restrictor, of the negative photoresist is flush exposed to light and cured using a first photomask in which patterns of the ink chamber and the restrictor of the ink passage are formed. Subsequently, a second portion which forms an upper wall of the ink passage forming wall of the negative photoresist is exposed to the light using a second photomask in which the pattern of a nozzle is formed, and the second portion is exposed to the light by only a predetermined thickness. Last, an uncured portion of the negative photoresist is dissolved and removed using solvent. An ink-jet printhead whose elements are monolithically formed by a simplified process using a single negative photoresist can be manufactured.
Abstract:
PURPOSE: An ink cartridge and an ink jet printer by using the same are provided to notify a user of an exchanging time of the ink cartridge by detecting the remaining of ink by using optical sensor. CONSTITUTION: An ink cartridge includes an ink storage, a housing for covering the ink storage, a leaf spring(110) interposed between the ink storage and the housing, a strip(112) for detecting the remaining of ink, and a pair of strip covers(130a,130b). The ink storage consists of a base plate(104), a cover plate(106), and a flexible bag(108). The cover plate(106) is spaced in parallel to the base plate(104). Both opening parts of the flexible bag(108) closely makes contact with the base plate(104) and the cover plate(106) so as to close a space formed between the base plate(104) and the cover plate(106). The housing consists of a housing body(100) and a housing cover(102).
Abstract:
PURPOSE: A micro actuator for an ink-jet printer head using multilayered shape-memory alloy and a method for the same are provided to improve fatigue phenomenon according to the repeated use, thereby improving repetitive mechanic characteristic and equally maintaining vibration characteristic as the actuator. CONSTITUTION: A method for manufacturing a micro actuator for an ink-jet printer head using multilayered shape-memory alloy includes the steps of supplying a silicon substrate(20), forming an insulating film(22a) on the surface of the silicon substrate, forming a shape-memory alloy layer(24a) on the top of the insulating film, forming multilayered insulating films and the shape-memory alloy layers by repeating steps of forming the insulating and the shape-memory alloy layer, giving a shape-memory property on the shape-memory alloy layer by heat-treating, and forming a lower space part(26) by etching the silicon substrate.