Patents by Inventor Madhusudan K. Iyengar
Madhusudan K. Iyengar 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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Publication number: 20220269019Abstract: Heat dissipation and electric shielding techniques and apparatuses are disclosed to enable the operation of OSFP modules at higher bandwidths. OSFP compatible techniques are discussed including the use of water cooling, addition of heat pipes, use of intercoolers, air-fins and air-foils, optimization of cooling fins, use of vapor chambers are discussed.Type: ApplicationFiled: February 9, 2022Publication date: August 25, 2022Inventors: William F. Edwards, JR., Melanie Beauchemin, Timothy Conrad Lee, Federico Pio Centola, Madhusudan K. Iyengar, Michael Chi Kin Lau, Zuowei Shen, Justin Sishung Lee
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Publication number: 20220240421Abstract: A system includes a central supply line and a central return line connected to a fluid source of cooling liquid. A rack supply manifold is connected to the central supply line. A rack return manifold is connected to the central return line. A liquid cooling loop assembly may be coupled to at least one cooling device connected to a circuit board. Multiple inlet connectors may be connected to the rack supply manifold. Multiple outlet connectors may be connected to the rack return manifold. The multiple inlet connectors provide a passageway for the cooling liquid from the central supply line into the liquid cooling loop assembly for distribution to the at least one cooling device. The multiple outlet connectors provide a passageway to the rack return manifold for the cooling liquid exiting the at least one cooling device.Type: ApplicationFiled: January 25, 2021Publication date: July 28, 2022Inventors: Feini Zhang, Madhusudan K. Iyengar, Reza H. Khiabani
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Patent number: 11249264Abstract: Heat dissipation and electric shielding techniques and apparatuses are disclosed to enable the operation of OSFP modules at higher bandwidths. OSFP compatible techniques are discussed including the use of water cooling, addition of heat pipes, use of intercoolers, air-fins and air-foils, optimization of cooling fins, use of vapor chambers are discussed.Type: GrantFiled: December 15, 2020Date of Patent: February 15, 2022Assignee: Google LLCInventors: William F. Edwards, Jr., Melanie Beauchemin, Timothy Conrad Lee, Federico Pio Centola, Madhusudan K. Iyengar, Michael Chi Kin Lau, Zuowei Shen, Justin Sishung Lee
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Publication number: 20220003946Abstract: Heat dissipation and electric shielding techniques and apparatuses are disclosed to enable the operation of OSFP modules at higher bandwidths. OSFP compatible techniques are discussed including the use of water cooling, addition of heat pipes, use of intercoolers, air-fins and air-foils, optimization of cooling fins, use of vapor chambers are discussed.Type: ApplicationFiled: December 15, 2020Publication date: January 6, 2022Inventors: William F. Edwards, Jr., Melanie Beauchemin, Timothy Conrad Lee, Federico Pio Centola, Madhusudan K. Iyengar, Michael Chi Kin Lau, Zuowei Shen, Justin Sishung Lee
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Publication number: 20210378132Abstract: A data rack system includes a data center rack frame, a shelf positioned within the data center rack frame; and a modular battery unit disposed on the shelf. The modular battery unit further includes a housing having an outer surface, a plurality of strips of phase change material (“PCM”) attached to the outer surface and spaced apart from one another; and air flow channels. The air flow channels are formed in spaces between two adjacent strips of the plurality of strips and defined by a shape and size of the spaces between the two adjacent strips.Type: ApplicationFiled: May 28, 2020Publication date: December 2, 2021Inventors: Madhusudan K. Iyengar, Melanie Beauchemin, Christopher Malone
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Publication number: 20210378106Abstract: A method of manufacturing a chip assembly comprises joining an in-process unit to a printed circuit board; reflowing a bonding material disposed between and electrically connecting the in-process unit with the printed circuit board, the bonding material having a first reflow temperature; and then joining a heat distribution device to the plurality of semiconductor chips using a thermal interface material (“TIM”) having a second reflow temperature that is lower than the first reflow temperature. The in-process unit further comprises a substrate having an active surface, a passive surface, and contacts exposed at the active surface; an interposer electrically connected to the substrate; a plurality of semiconductor chips overlying the substrate and electrically connected to the substrate through the interposer, and a stiffener overlying the substrate and having an aperture extending therethrough, the plurality of semiconductor chips being positioned within the aperture.Type: ApplicationFiled: May 28, 2021Publication date: December 2, 2021Inventors: Madhusudan K. Iyengar, Christopher Malone, Woon-Seong Kwon, Emad Samadiani, Melanie Beauchemin, Padam Jain, Teckgyu Kang, Yuan Li, Connor Burgess, Norman Paul Jouppi, Nicholas Stevens-Yu, Yingying Wang
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Publication number: 20210366841Abstract: A weight optimized stiffener for use in a semiconductor device is disclosed herein. In one example, the stiffener is made of AlSiC for its weight and thermal properties. An O-ring provides sealing between a top surface of the stiffener and a component of the semiconductor device and adhesive provides sealing between a bottom surface of the stiffener and another component of the semiconductor device. The stiffener provides warpage control for a lidless package while enabling direct liquid cooling of a chip or substrate.Type: ApplicationFiled: May 19, 2020Publication date: November 25, 2021Inventors: Madhusudan K. Iyengar, Connor Burgess, Padam Jain, Emad Samadiani, Yuan Li
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Publication number: 20210366807Abstract: Systems and methods for utilizing the dead space around the periphery of a chip for sealing a direct liquid cooled module are disclosed. One of the functions of a direct liquid cooled module is to provide cooling liquid to components located on a chip. A groove member for receiving a sealing member may be applied to the top surface of the chip. The groove member may be directly deposited to the top surface or coupled thereto via an adhesive and/or epoxy. The groove member may be in the form of opposing sidewalls or a u-shaped structure each of which form a partial enclosure for receipt of the sealing member. The groove member may be located entirely within the dead space or at least partially within the dead space and partially within a central area in which the chip components are located. The sealing member may be an O-ring or a gasket.Type: ApplicationFiled: May 21, 2020Publication date: November 25, 2021Inventors: Jorge Padilla, Madhusudan K. Iyengar, Connor Burgess, Padam Jain, Yuan Li, Feini Zhang
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Publication number: 20210366806Abstract: Systems and methods for using spring force based compliance to minimize the bypass liquid flow gaps between the tops of chip microfins and bottom side of manifold ports are disclosed herein. A fluid delivery and exhaust manifold structure provides direct liquid cooling of a module. The manifold sits on top of a chip with flow channels. Inlet and outlet channels of the manifold in contact with flow channels of the chip creates an intricate crossflow path for the coolant resulting in improved heat transfer between the chip and the working fluid. The module is also designed with pressure reduction features using internal leakage flow openings to account for pressure differential between fluid entering and being expelled from the module.Type: ApplicationFiled: May 20, 2020Publication date: November 25, 2021Inventors: Madhusudan K. Iyengar, Connor Burgess, Emad Samadiani, Padam Jain, Jorge Padilla, Feini Zhang, Yuan Li
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Publication number: 20210243919Abstract: A data center cooling system has an indoor portion wherein heat is absorbed from components in the data center, and an outdoor heat exchanger portion wherein outside air is used to cool a first heat transfer fluid (e.g., water) present in at least the outdoor heat exchanger portion of the cooling system during a first mode. When an appropriate time has been reached to switch from the first mode to a second mode, the outdoor heat exchanger portion of the data cooling system is switched to a second heat transfer fluid, which is a relatively low performance heat transfer fluid (compared to the first fluid). It has a second heat transfer fluid freezing point, lower than the first heat transfer fluid freezing point, and sufficiently low to operate without freezing when the outdoor air temperature drops below a first predetermined relationship with the first heat transfer fluid freezing point.Type: ApplicationFiled: January 15, 2021Publication date: August 5, 2021Inventors: Madhusudan K. Iyengar, Pritish R. Parida, Mark D. Schultz
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Patent number: 11019755Abstract: Energy efficient control of cooling system cooling of an electronic system is provided based, in part, on weighted cooling effectiveness of the components. The control includes automatically determining speed control settings for multiple adjustable cooling components of the cooling system. The automatically determining is based, at least in part, on weighted cooling effectiveness of the components of the cooling system, and the determining operates to limit power consumption of at least the cooling system, while ensuring that a target temperature associated with at least one of the cooling system or the electronic system is within a desired range by provisioning, based on the weighted cooling effectiveness, a desired target temperature change among the multiple adjustable cooling components of the cooling system. The provisioning includes provisioning applied power to the multiple adjustable cooling components via, at least in part, the determined control settings.Type: GrantFiled: January 22, 2020Date of Patent: May 25, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Levi A. Campbell, Richard C. Chu, Milnes P. David, Michael J. ELLSWORTH, Jr., Madhusudan K. Iyengar, Roger R. Schmidt, Robert E. Simons
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Patent number: 11013152Abstract: A data center cooling system has an indoor portion wherein heat is absorbed from components in the data center, and an outdoor heat exchanger portion wherein outside air is used to cool a first heat transfer fluid (e.g., water) present in at least the outdoor heat exchanger portion of the cooling system during a first mode. When an appropriate time has been reached to switch from the first mode to a second mode, the outdoor heat exchanger portion of the data cooling system is switched to a second heat transfer fluid, which is a relatively low performance heat transfer fluid (compared to the first fluid). It has a second heat transfer fluid freezing point, lower than the first heat transfer fluid freezing point, and sufficiently low to operate without freezing when the outdoor air temperature drops below a first predetermined relationship with the first heat transfer fluid freezing point.Type: GrantFiled: May 21, 2019Date of Patent: May 18, 2021Assignee: International Business Machines CorporationInventors: Madhusudan K. Iyengar, Pritish R. Parida, Mark D. Schultz
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Publication number: 20200178422Abstract: Energy efficient control of cooling system cooling of an electronic system is provided based, in part, on weighted cooling effectiveness of the components. The control includes automatically determining speed control settings for multiple adjustable cooling components of the cooling system. The automatically determining is based, at least in part, on weighted cooling effectiveness of the components of the cooling system, and the determining operates to limit power consumption of at least the cooling system, while ensuring that a target temperature associated with at least one of the cooling system or the electronic system is within a desired range by provisioning, based on the weighted cooling effectiveness, a desired target temperature change among the multiple adjustable cooling components of the cooling system. The provisioning includes provisioning applied power to the multiple adjustable cooling components via, at least in part, the determined control settings.Type: ApplicationFiled: January 22, 2020Publication date: June 4, 2020Inventors: Levi A. CAMPBELL, Richard C. CHU, Milnes P. DAVID, Michael J. ELLSWORTH, JR., Madhusudan K. IYENGAR, Roger R. SCHMIDT, Robert E. SIMONS
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Patent number: 10595447Abstract: Energy efficient control of cooling system cooling of an electronic system is provided based, in part, on weighted cooling effectiveness of the components. The control includes automatically determining speed control settings for multiple adjustable cooling components of the cooling system. The automatically determining is based, at least in part, on weighted cooling effectiveness of the components of the cooling system, and the determining operates to limit power consumption of at least the cooling system, while ensuring that a target temperature associated with at least one of the cooling system or the electronic system is within a desired range by provisioning, based on the weighted cooling effectiveness, a desired target temperature change among the multiple adjustable cooling components of the cooling system. The provisioning includes provisioning applied power to the multiple adjustable cooling components via, at least in part, the determined control settings.Type: GrantFiled: June 12, 2018Date of Patent: March 17, 2020Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Levi A. Campbell, Richard C. Chu, Milnes P. David, Michael J. Ellsworth, Jr., Madhusudan K. Iyengar, Roger R. Schmidt, Robert E. Simons
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Publication number: 20200029470Abstract: A data center cooling system has an indoor portion wherein heat is absorbed from components in the data center, and an outdoor heat exchanger portion wherein outside air is used to cool a first heat transfer fluid (e.g., water) present in at least the outdoor heat exchanger portion of the cooling system during a first mode. When an appropriate time has been reached to switch from the first mode to a second mode, the outdoor heat exchanger portion of the data cooling system is switched to a second heat transfer fluid, which is a relatively low performance heat transfer fluid (compared to the first fluid). It has a second heat transfer fluid freezing point, lower than the first heat transfer fluid freezing point, and sufficiently low to operate without freezing when the outdoor air temperature drops below a first predetermined relationship with the first heat transfer fluid freezing point.Type: ApplicationFiled: May 21, 2019Publication date: January 23, 2020Inventors: Madhusudan K. Iyengar, Pritish R. Parida, Mark D. Schultz
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Patent number: 10440862Abstract: A data center cooling system has an indoor portion wherein heat is absorbed from components in the data center, and an outdoor heat exchanger portion wherein outside air is used to cool a first heat transfer fluid (e.g., water) present in at least the outdoor heat exchanger portion of the cooling system during a first mode. When an appropriate time has been reached to switch from the first mode to a second mode, the outdoor heat exchanger portion of the data cooling system is switched to a second heat transfer fluid, which is a relatively low performance heat transfer fluid (compared to the first fluid). It has a second heat transfer fluid freezing point, lower than the first heat transfer fluid freezing point, and sufficiently low to operate without freezing when the outdoor air temperature drops below a first predetermined relationship with the first heat transfer fluid freezing point.Type: GrantFiled: September 28, 2015Date of Patent: October 8, 2019Assignee: International Business Machines CorporationInventors: Madhusudan K. Iyengar, Pritish R. Parida, Mark D. Schultz
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Patent number: 10342165Abstract: A data center cooling system has an indoor portion wherein heat is absorbed from components in the data center, and an outdoor heat exchanger portion wherein outside air is used to cool a first heat transfer fluid (e.g., water) present in at least the outdoor heat exchanger portion of the cooling system during a first mode. When an appropriate time has been reached to switch from the first mode to a second mode, the outdoor heat exchanger portion of the data cooling system is switched to a second heat transfer fluid, which is a relatively low performance heat transfer fluid (compared to the first fluid). It has a second heat transfer fluid freezing point, lower than the first heat transfer fluid freezing point, and sufficiently low to operate without freezing when the outdoor air temperature drops below a first predetermined relationship with the first heat transfer fluid freezing point.Type: GrantFiled: September 28, 2015Date of Patent: July 2, 2019Assignee: International Business Machines CorporationInventors: Madhusudan K. Iyengar, Pritish R. Parida, Mark D. Schultz
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Patent number: 10244665Abstract: Energy efficient control of cooling system cooling of an electronic system is provided based, in part, on weighted cooling effectiveness of the components. The control includes automatically determining speed control settings for multiple adjustable cooling components of the cooling system. The automatically determining is based, at least in part, on weighted cooling effectiveness of the components of the cooling system, and the determining operates to limit power consumption of at least the cooling system, while ensuring that a target temperature associated with at least one of the cooling system or the electronic system is within a desired range by provisioning, based on the weighted cooling effectiveness, a desired target temperature change among the multiple adjustable cooling components of the cooling system. The provisioning includes provisioning applied power to the multiple adjustable cooling components via, at least in part, the determined control settings.Type: GrantFiled: December 7, 2015Date of Patent: March 26, 2019Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Levi A. Campbell, Richard C. Chu, Milnes P. David, Michael J. Ellsworth, Jr., Madhusudan K. Iyengar, Roger R. Schmidt, Robert E. Simons
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Patent number: 10238009Abstract: Cooling control methods include measuring a temperature of at least one component of each of multiple nodes and finding a maximum component temperature across all such nodes, comparing the maximum component temperature to a first and second component threshold and comparing the air temperature to a first and second air threshold, and controlling a proportion of coolant flow and a coolant flow rate to the air-to-liquid heat exchanger and the nodes based on the comparisons.Type: GrantFiled: January 22, 2016Date of Patent: March 19, 2019Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Timothy J. Chainer, Milnes P. David, Madhusudan K. Iyengar, Pritish R. Parida, Robert E. Simons
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Publication number: 20180295754Abstract: Energy efficient control of cooling system cooling of an electronic system is provided based, in part, on weighted cooling effectiveness of the components. The control includes automatically determining speed control settings for multiple adjustable cooling components of the cooling system. The automatically determining is based, at least in part, on weighted cooling effectiveness of the components of the cooling system, and the determining operates to limit power consumption of at least the cooling system, while ensuring that a target temperature associated with at least one of the cooling system or the electronic system is within a desired range by provisioning, based on the weighted cooling effectiveness, a desired target temperature change among the multiple adjustable cooling components of the cooling system. The provisioning includes provisioning applied power to the multiple adjustable cooling components via, at least in part, the determined control settings.Type: ApplicationFiled: June 12, 2018Publication date: October 11, 2018Inventors: Levi A. CAMPBELL, Richard C. CHU, Milnes P. DAVID, Michael J. ELLSWORTH, JR., Madhusudan K. IYENGAR, Roger R. SCHMIDT, Robert E. SIMONS