Nanodynamics, Inc.

Wisertek International Corporation

Chen-Hua Lin

Ming-Hsun Yang

Ji-Chen Wu

Ching-Yu Chou

Chih-Chieh Hsu

Chi-Chung Hsu

Guey-Chyuan Chen

Wen-Chung Lu

Arnold Chang-Mou Yang

Hung-Chou Kang

Arnold Chang-mou Yang

Shih-hung Lee

Dong-Sang Chiang

Fung-Ing Hsu

A printhead includes a silicon substrate, a first barrier layer, a second barrier layer, and a nozzle plate. The silicon substrate has a plurality of thermal elements and a main ink supply channel, each of the thermal elements being in a firing chamber of the first barrier layer and in fluid communications with the main ink supply channel through ink channels. The top of each ink firing elements is aligned with a nozzle on the nozzle plate. To satisfy the need for high-frequency ink ejection, the second barrier layer is utilized to provide an auxiliary ink supply channel for increasing the ink supply speed. The ink channel between the main ink supply and the ink channel inlet is enlarged in the vertical direction so as to lower the pressure and thus increase the ink supply speed.

Ink supply structure for inkjet printhead

A method of manufacturing a piezoelectric ink-jet print-head uses a metallic layer and a thick film layer with a slot hole therein instead of a ceramic vibration plate and an ink layer. The piezoelectric layer and the upper electrode layer are formed inside the ink cavity so that overall thickness of the print head is reduced. To form the ink-jet print head, a metallic layer and a lower electrode layer are sequentially formed over a substrate. A patterned piezoelectric layer and an upper electrode layer are sequentially formed over the lower electrode layer. A patterned thick film layer with a slot hole therein is formed over the metallic layer. The thick film layer and the metallic layer together form a cavity that encloses the piezoelectric layer and the upper electrode layer. A nozzle plate having a nozzle thereon is attached to the thick film layer. The nozzle plate, the thick film layer and the metallic layer together form an ink cavity. The hole in the nozzle is continuous with the ink cavity.

Method of manufacturing a piezoelectric print-head

An ink chamber structure for an inkjet printhead, comprising a plurality of ink channels and a plurality of ink chambers arrayed in columns, with each of such plurality of ink chambers corresponding to an ink channel; the plurality of ink channels respectively channels ink from two sides of such column into ink chambers. The openings for part of the ink chambers are located on one side of the column installation, whereas the openings for the rest of the ink chambers are located on the other side of the column installation. By utilizing the cavity between two adjacent ink chambers on the same side to install an ink chamber from the other side, higher density of ink chamber installment can be achieved in the same scope of space. Also, with the ink chambers on the left and right sides being indentedly arranged, the ink chambers are provided with larger ink-inlet angles, thus effectively avoiding disturbance that adversely affects the reception of ink by the chambers.

Ink chamber structure for an inkjet printhead

An ink cartridge having a piezoelectric jet module has an ink storage module having a hollow ink storage region, a piezoelectric jet module having a plurality of ink chambers and a connection circuit, and an ink channel connected to the ink storage module and to the piezoelectric jet module. The piezoelectric inkjet printhead has a bottom film and chamber walls which are obtained by applying a photosensitive polymer on a substrate on which a piezoelectric layer has been formed and carrying out photolithography.

Process for producing inkjet printhead

A printhead includes a silicon substrate, a first barrier layer, a second barrier layer, and a nozzle plate. The silicon substrate has a plurality of thermal elements and a main ink supply channel, each of the thermal elements being in a firing chamber of the first barrier layer and in fluid communications with the main ink supply channel through ink channels. The top of each ink firing elements is aligned with a nozzle on the nozzle plate. To satisfy the need for high frequency ink ejection, the second barrier layer is utilized to provide an auxiliary ink supply channel for increasing the ink supply speed. The ink channel between the main ink supply and the ink channel inlet is enlarged in the vertical direction so as to lower the pressure and thus increase the ink supply speed.

A piezoelectric ink-jet printhead that uses a metallic layer and a thick film layer with a slot hole therein instead of a ceramic vibration plate and an ink layer. The piezoelectric layer and the upper electrode layer are formed inside the ink cavity so that overall thickness of the print head is reduced. To form the ink-jet print head, a metallic layer and a lower electrode layer are sequentially formed over a substrate. A patterned piezoelectric layer and an upper electrode layer are sequentially formed over the lower electrode layer. A patterned thick film layer with a slot hole therein is formed over the metallic layer. The thick film layer and the metallic layer together form a cavity that encloses the piezoelectric layer and the upper electrode layer. A nozzle plate having a nozzle thereon is attached to the thick film layer. The nozzle plate, the thick film layer and the metallic layer together form an ink cavity. The hole in the nozzle is continuous with the ink cavity.

Piezoelectric print-head and method of manufacture

A method according to the invention comprises the following steps. At first, a first layer of film is coated over a micro-control apparatus having a plurality of ejecting elements. Next, a plurality of ink chambers, a plurality of ink channels, and a plurality of supporting cylinders are simultaneously formed in the first layer of film by photolithography. More specifically, the plurality of supporting cylinders is located within the plurality of ink channels. Thereafter, a layer of liquid medium is coated over the first layer of film. A photosensitive film is provided over the first layer of film, and then a plurality of ink orifices is formed therein at positions respectively corresponding to the plurality of ink chambers by photolithography. Finally, the micro-control apparatus is connected to a signal input means. Accordingly, a precision alignment of application between ink orifices and ink chambers in manufacturing a conventional printhead is not necessary so that the throughput and yield rate can be increased.

Method for manufacturing a printhead of ink jet printing apparatus

A heat bonding apparatus for manufacturing an ink-jet printhead, whereby a flexible circuit tape is heat-bonded on the an IC chip of an ink-jet printhead so that a signal from the printing apparatus can be transmitted to the IC chip of the ink-jet printhead to control the ink-jet printing operation. The heat bonding apparatus comprises a head seat; a heat bonding head seated in the head seat, the heat bonding head being movable along with the head seat to carry out a heat bonding process; and a heat bonding sheet of arc shape and in the form of an elastic metal sheet. The heat bonding sheet is deformable under pressure and one end of the heat bonding sheet is secured to the heat bonding head so that when the heat bonding sheet is pressed for heat bonding the flexible circuit tape and the IC chip, the heat bonding sheet undergoes deformation and in the mean time pushes the air away from between the flexible circuit tape and the IC chip to let them fully contact each other.

Heat bonding apparatus for manufacturing an ink-jet printhead

A method in accordance with present invention comprises the steps of: forming a micro-control apparatus having a plurality of ejecting elements; forming a first layer of film on said micro-control apparatus and forming a plurality of ink chambers in the first layer of film; forming a second layer of photosensitive film on said first layer of film and forming an ink orifice in said second layer of photosensitive film relative to each of said plurality of ink chambers in the first layer of film by photolithography. The method for manufacturing the printhead in accordance with the present invention is relatively simple. Using this method, the application of a nozzle plate to a dry film photoresist and the precision alignment between ink orifices and ink chambers in manufacturing a conventional printhead can be avoided so that the throughput and yield rate can be increased.

Printhead of ink jet printing apparatus and manufacturing method therefor

Ink-jet printhead and manufacturing process

Method and apparatus of identifying ink stored in an ink-jet cartridge are to change the electrical property such as resistance or capacitance of the ink and to cooperate with a detector to achieve the goal of identifying ink. The method comprises: adding special additive such as salt additive or acid additive into the ink or changing the ratio of the components in the ink, and further providing a detector for detecting the electrical property of the ink and doing logical judgment to identify whether the ink stored in the ink-jet cartridge is the original factory ink or not. The preferred embodiment of the apparatus of identifying ink in ink-jet cartridge is to form the detector on the IC of the print head directly to achieve the goal stating above of detecting the electrical property of the ink stored in the ink-jet cartridge.

Method and apparatus of identifying ink stored in an ink-jet cartridge

This specification discloses an electrode type print head for the printing apparatus and the method for manufacturing the same. The print head is placed in the inkjet cartridge of an inkjet-printing device. The print head comprises a substrate and a flexible nozzle plate with an ink reservoir formed in between. The flexible nozzle plate is attached onto the substrate, and the electrode set of the flexible nozzle plate corresponds to that of the substrate. When currents of different polarities are provided thereon, an absorptive force is generated to pull the flexible nozzle plate closer to the substrate. A pushing force jets the ink out of the print head and onto a printing media to achieve the goal of inkjet printing.

Growing community of inventors

Yunlin Hsien, Taiwan

Chen-Hua Lin