Patents by Inventor Doo-jin Maeng
Doo-jin Maeng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6868605Abstract: A bubble-jet type ink-jet printhead and manufacturing method thereof including a substrate integrally having an ink supply manifold, an ink chamber, and an ink channel; a nozzle plate having a nozzle on the substrate; a heater centered around the nozzle and an electrode for applying current to the heater on the nozzle plate; and an adiabatic layer on the heater for preventing heat generated by the heater from being conducted upward from the heater. Alternatively, a bubble-jet type ink-jet printhead may be formed on a silicon-on-insulator (SOI) wafer having a first substrate, an oxide layer, and a second substrate stacked thereon and include an adiabatic barrier on the second substrate. In the bubble-jet type ink-jet printhead and manufacturing method thereof, the adiabatic layer or the adiabatic barrier is provided to transmit most of the heat generated by the heater to ink under the heater, thereby increasing energy efficiency.Type: GrantFiled: January 31, 2003Date of Patent: March 22, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Doo-jin Maeng, Keon Kuk, Yong-soo Oh, Hyeon-cheol Kim, Sang-wook Lee
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Patent number: 6652077Abstract: A high-density ink-jet printhead, in which a plurality of nozzles, through which ink is ejected, are arrayed on an ink supply manifold in a plurality of rows is provided, wherein the ink-jet printhead includes a substrate; hemispherical ink chambers at a surface of the substrate; a manifold for supplying ink to the ink chambers; ink channels to be in flow communication with the ink chambers and the manifold; a nozzle plate monolithically formed with the substrate; nozzles formed on the nozzle plate, each formed to correspond to a center of each of the ink chambers; heaters formed on the nozzle plate, each having a ring shape and encircling a corresponding nozzle; and electrodes, positioned on the nozzle plate and electrically connected to the heaters, for applying current to the heaters, wherein the nozzles are arrayed on the manifold in at least in three rows, and preferably in five rows.Type: GrantFiled: October 21, 2002Date of Patent: November 25, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Doo-jin Maeng, Yong-soo Oh, Sang-hoon Lee, Keon Kuk
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Publication number: 20030142169Abstract: A bubble-jet type ink-jet printhead and manufacturing method thereof including a substrate integrally having an ink supply manifold, an ink chamber, and an ink channel; a nozzle plate having a nozzle on the substrate; a heater centered around the nozzle and an electrode for applying current to the heater on the nozzle plate; and an adiabatic layer on the heater for preventing heat generated by the heater from being conducted upward from the heater. Alternatively, a bubble-jet type ink-jet printhead may be formed on a silicon-on-insulator (SOI) wafer having a first substrate, an oxide layer, and a second substrate stacked thereon and include an adiabatic barrier on the second substrate. In the bubble-jet type ink-jet printhead and manufacturing method thereof, the adiabatic layer or the adiabatic barrier is provided to transmit most of the heat generated by the heater to ink under the heater, thereby increasing energy efficiency.Type: ApplicationFiled: January 31, 2003Publication date: July 31, 2003Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Doo-Jin Maeng, Keon Kuk, Yong-Soo Oh, Hyeon-Cheol Kim, Sang-Wook Lee
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Patent number: 6598961Abstract: A bubble-jet type ink-jet printhead, includes a substrate, a nozzle plate, a wall, and a heater, wherein the heater is interposed between the substrate and the nozzle plate to divide an ink chamber into a main ink chamber and a secondary ink chamber, wherein a main bubble and a secondary bubble are generated. The printhead may further include an ink channel for introducing ink into the secondary ink chamber for supplying the ink to the main ink chamber. The printhead according to the present invention consumes less energy, prevents a backflow of ink, and operates at increased speed.Type: GrantFiled: November 29, 2001Date of Patent: July 29, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Keon Kuk, Doo-jin Maeng, Yong-soo Oh
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Patent number: 6561625Abstract: A bubble-jet type ink-jet printhead and manufacturing method thereof including a substrate integrally having an ink supply manifold, an ink chamber, and an ink channel; a nozzle plate having a nozzle on the substrate; a heater centered around the nozzle and an electrode for applying current to the heater on the nozzle plate; and an adiabatic layer on the heater for preventing heat generated by the heater from being conducted upward from the heater. Alternatively, a bubble-jet type ink-jet printhead may be formed on a silicon-on-insulator (SOI) wafer having a first substrate, an oxide layer, and a second substrate stacked thereon and include an adiabatic barrier on the second substrate. In the bubble-jet type ink-jet printhead and manufacturing method thereof, the adiabatic layer or the adiabatic barrier is provided to transmit most of the heat generated by the heater to ink under the heater, thereby increasing energy efficiency.Type: GrantFiled: December 17, 2001Date of Patent: May 13, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Doo-jin Maeng, Keon Kuk, Yong-soo Oh, Hyeon-cheol Kim, Sang-wook Lee
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Publication number: 20030081078Abstract: A high-density ink-jet printhead, in which a plurality of nozzles, through which ink is ejected, are arrayed on an ink supply manifold in a plurality of rows is provided, wherein the ink-jet printhead includes a substrate; hemispherical ink chambers at a surface of the substrate; a manifold for supplying ink to the ink chambers; ink channels to be in flow communication with the ink chambers and the manifold; a nozzle plate monolithically formed with the substrate; nozzles formed on the nozzle plate, each formed to correspond to a center of each of the ink chambers; heaters formed on the nozzle plate, each having a ring shape and encircling a corresponding nozzle; and electrodes, positioned on the nozzle plate and electrically connected to the heaters, for applying current to the heaters, wherein the nozzles are arrayed on the manifold in at least in three rows, and preferably in five rows.Type: ApplicationFiled: October 21, 2002Publication date: May 1, 2003Inventors: Doo-jin Maeng, Yong-soo Oh, Sang-hoon Lee, Keon Kuk
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Publication number: 20020075360Abstract: A bubble-jet type ink-jet printhead and manufacturing method thereof including a substrate integrally having an ink supply manifold, an ink chamber, and an ink channel; a nozzle plate having a nozzle on the substrate; a heater centered around the nozzle and an electrode for applying current to the heater on the nozzle plate; and an adiabatic layer on the heater for preventing heat generated by the heater from being conducted upward from the heater. Alternatively, a bubble-jet type ink-jet printhead may be formed on a silicon-on-insulator (SOI) wafer having a first substrate, an oxide layer, and a second substrate stacked thereon and include an adiabatic barrier on the second substrate. In the bubble-jet type ink-jet printhead and manufacturing method thereof, the adiabatic layer or the adiabatic barrier is provided to transmit most of the heat generated by the heater to ink under the heater, thereby increasing energy efficiency.Type: ApplicationFiled: December 17, 2001Publication date: June 20, 2002Inventors: Doo-jin Maeng, Keon Kuk, Yong-soo Oh, Hyeon-cheol Kim, Sang-wook Lee
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Publication number: 20020067396Abstract: A bubble-jet type ink-jet printhead, includes a substrate, a nozzle plate, a wall, and a heater, wherein the heater is interposed between the substrate and the nozzle plate to divide an ink chamber into a main ink chamber and a secondary ink chamber, wherein a main bubble and a secondary bubble are generated. The printhead may further include an ink channel for introducing ink into the secondary ink chamber for supplying the ink to the main ink chamber. The printhead according to the present invention consumes less energy, prevents a backflow of ink, and operates at increased speed.Type: ApplicationFiled: November 29, 2001Publication date: June 6, 2002Inventors: Keon Kuk, Doo-Jin Maeng, Yong-Soo Oh