Patents by Inventor Gobinda Das
Gobinda Das 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: 20230136106Abstract: Space efficient distributed storage systems are disclosed. For example, A system comprising a distributed storage volume (DSV) deployed on a plurality of hosts, the DSV comprising logical volumes, the logical volumes deployed on physical storage devices; and a first host of the plurality of hosts with a local cache, and a storage controller, the storage controller executing on a processor to receive a request relating to a first file; query the DSV to determine whether a second file that is a copy of the first file is stored in the DSV; and based on determining from the querying that the second file resides in a logical volume of the logical volumes in the DSV, store a separate reference to the second file in at least one logical volume of the DSV, wherein the separate reference is a virtual reference or link to the second file.Type: ApplicationFiled: December 22, 2022Publication date: May 4, 2023Inventor: Gobinda Das
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Patent number: 11550755Abstract: High performance space efficient distributed storage is disclosed. For example, a distributed storage volume (DSV) is deployed on a plurality of hosts, with a first host storing a local cache, and a storage controller executing on a processor of the first host receives a request to store a first file. The first file is stored to the local cache. The DSV is queried to determine whether a second file that is a copy of the first file is stored in the DSV. In response to determining that the DSV lacks the second file, the first file is transferred from the local cache to the DSV and then replicated to a second host of the plurality of hosts. In response to determining that the second file resides in the DSV, a reference to the second file is stored in the DSV and then replicated to the second host.Type: GrantFiled: November 15, 2018Date of Patent: January 10, 2023Assignee: Red Hat, Inc.Inventor: Gobinda Das
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Publication number: 20200159698Abstract: High performance space efficient distributed storage is disclosed. For example, a distributed storage volume (DSV) is deployed on a plurality of hosts, with a first host storing a local cache, and a storage controller executing on a processor of the first host receives a request to store a first file. The first file is stored to the local cache. The DSV is queried to determine whether a second file that is a copy of the first file is stored in the DSV. In response to determining that the DSV lacks the second file, the first file is transferred from the local cache to the DSV and then replicated to a second host of the plurality of hosts. In response to determining that the second file resides in the DSV, a reference to the second file is stored in the DSV and then replicated to the second host.Type: ApplicationFiled: November 15, 2018Publication date: May 21, 2020Inventor: Gobinda Das
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Patent number: 8524596Abstract: Techniques for bond pad fabrication are provided. In one aspect, a method of forming a bond pad comprises the following steps. At least one alloying element is selectively introduced to at least a portion of at least one surface of the bond pad. The at least one alloying element is diffused into at least a portion of the bond pad through one or more thermal cycles. The at least one alloying element may be selectively introduced to the bond pad by depositing an alloying element layer comprising the at least one alloying element onto the bond pad and patterning and etching at least a portion of the layer.Type: GrantFiled: July 16, 2012Date of Patent: September 3, 2013Assignee: International Business Machines CorporationInventors: Frederic Beaulieu, Gobinda Das, Steven J. Duda, Matthew J. Farinelli, Adreanne Kelly, Samuel McKnight, William J. Murphy
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Publication number: 20120279767Abstract: Techniques for bond pad fabrication are provided. In one aspect, a method of forming a bond pad comprises the following steps. At least one alloying element is selectively introduced to at least a portion of at least one surface of the bond pad. The at least one alloying element is diffused into at least a portion of the bond pad through one or more thermal cycles. The at least one alloying element may be selectively introduced to the bond pad by depositing an alloying element layer comprising the at least one alloying element onto the bond pad and patterning and etching at least a portion of the layer.Type: ApplicationFiled: July 16, 2012Publication date: November 8, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Frederic Beaulieu, Gobinda Das, Steven J. Duda, Matthew J. Farinelli, Adreanne Kelly, Samuel McKnight, William J. Murphy
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Publication number: 20060244138Abstract: Techniques for bond pad fabrication are provided. In one aspect, a method of forming a bond pad comprises the following steps. At least one alloying element is selectively introduced to at least a portion of at least one surface of the bond pad. The at least one alloying element is diffused into at least a portion of the bond pad through one or more thermal cycles. The at least one alloying element may be selectively introduced to the bond pad by depositing an alloying element layer comprising the at least one alloying element onto the bond pad and patterning and etching at least a portion of the layer.Type: ApplicationFiled: April 27, 2005Publication date: November 2, 2006Applicant: International Business Machines CorporationInventors: Frederic Beaulieu, Gobinda Das, Steven Duda, Matthew Farinelli, Adreanne Kelly, Samuel McKnight, William Murphy
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Patent number: 7007380Abstract: A method for testing external connections to semiconductor devices. The method includes providing an external electrical path between selected external connections on the semiconductor devices.Type: GrantFiled: January 26, 2004Date of Patent: March 7, 2006Assignee: International Business Machines CorporationInventors: Gobinda Das, Franco Motika
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Publication number: 20040124867Abstract: A method for testing external connections to semiconductor devices. The method includes providing an external electrical path between selected external connections on the semiconductor devices.Type: ApplicationFiled: January 26, 2004Publication date: July 1, 2004Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Gobinda Das, Franco Motika
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Patent number: 6731128Abstract: A structure for testing external connections to semiconductor devices. The structure includes an external electrical path between selected external connections on the semiconductor devices.Type: GrantFiled: January 4, 2002Date of Patent: May 4, 2004Assignee: International Business Machines CorporationInventors: Gobinda Das, Franco Motika
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Patent number: 6426636Abstract: A nonresilient rigid test probe arrangement which is designed for testing the integrity of silicon semiconductor device wafers or chips, and which eliminates pliant conditions encountered by current text fixtures, which are adverse to the attainment of satisfactory test results with rigid probes. The test system interface assembly includes a rigid ceramic substrate which forms a pedestal over which the rigid probe makes electrical contact. A PC board is located on the opposite side of the ceramic substrate. A clamp ring retains the PC board to a test head system with mating precision reference surfaces formed therebetween. Pogo pin connectors extend between the PC board and the test head system. A stiffening element having a control aperture is bolted through the PC board to the clamp ring, all of which form a rigid test probe arrangement.Type: GrantFiled: February 11, 1998Date of Patent: July 30, 2002Assignee: International Business Machines CorporationInventors: Gobinda Das, Steven J. Duda, Paul M. Gaschke, Angelo M. Giaimo, Frederick L. Taber, Jr., John F. Vetrero
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Patent number: 6411112Abstract: A probe system for electrical contact testing of a row of densely spaced wire bonding pads is provided comprising a plurality of probes, with each probe having a tip offset from the probe center axis. The probes may be mounted in a housing having an upper die and a lower die, and the lower die may be offset from the upper die. The probes are pivotally mounted in the holes of the upper die, and the probe bodies are convexly curved and extend down into the holes of the lower die. The bevel tipped probes may be arranged in two staggered and parallel rows of probes, with the tip of each probe oriented along the centerline formed between the two row of probes. The probes may be closely spaced in each row. The tips of the probes in one row are oriented 180 degrees with respect to the probes in the opposite row. The tips of each probe may also comprise a tip located along the center axis or a double bevel surface forming a tip at the apex of the two bevel surfaces.Type: GrantFiled: February 19, 1998Date of Patent: June 25, 2002Assignee: International Business Machines CorporationInventors: Gobinda Das, Steven J. Duda, Paul M. Gaschke
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Publication number: 20020058346Abstract: A structure for testing external connections to semiconductor devices. The structure includes an external electrical path between selected external connections on the semiconductor devices.Type: ApplicationFiled: January 4, 2002Publication date: May 16, 2002Applicant: International Business MachinesInventors: Gobinda Das, Franco Motika
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Patent number: 6156484Abstract: Disclosed is a sculpted probe pad and a gray scale etching process for making arrays of such probe pads on a thin flexible interposer for testing the electrical integrity of microelectronic devices at terminal metallurgy. Also used in the etching process is a novel fixture for holding the substrate and a novel mask for 1-step photolithographic exposure. The result of the invention is an array of test probes of preselected uniform topography, which make ohmic contact at all points to be tested simultaneously and nondestructively.Type: GrantFiled: February 11, 1998Date of Patent: December 5, 2000Assignee: International Business Machines CorporationInventors: Ernest Bassous, Gobinda Das, Frank Daniel Egitto, Natalie Barbara Feilchenfeld, Elizabeth F. Foster, Stephen Joseph Fuerniss, James Steven Kamperman, Donald Joseph Mikalsen, Michael Roy Scheuermann, David Brian Stone
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Patent number: 5973928Abstract: A multi-layer ceramic module comprises a multi-layer ceramic substrate having an upper side and a lower side, at least one semiconductor chip mounted on the upper side of the substrate, a plurality of module pins projecting from the lower side of the substrate and at least one decoupling capacitor mounted on the lower side of the substrate between adjacent ones of the module pins.Type: GrantFiled: August 18, 1998Date of Patent: October 26, 1999Assignee: International Business Machines CorporationInventors: Charles J. Blasi, Gobinda Das, Franco Motika
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Patent number: 5059553Abstract: A method for making a structure for bonding to a conductive pad on a semiconductor substrate is described. The structure comprises a glassy passivating layer with a thickness of at least 3 microns deposited over the conductive pad. The passivating layer defines an aperture which exposes a portion of the conductive pad. A metal bump covers the portion of the conductive pad exposed in the aperture and further extends over the edges of the glassy passivating layers so as to form a seal between the conductive pad and the glassy passivating layer. A subsequent thermal compression bonding operation on such structure does not cause fractures in the glassy passivating layer due to its thickness.Type: GrantFiled: January 14, 1991Date of Patent: October 22, 1991Assignee: IBM CorporationInventors: Erich Berndlmaier, Gobinda Das, Thomas L. Viau
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Patent number: 5053851Abstract: A structure for bonding to a conductive pad on a semiconductor substrate is described. The structure comprises a glassy passivating layer with a thickness of at least 3 microns deposited over the conductive pad. The passivating layer defined an aperture which exposes a portion of the conductive pad. A metal bump covers the portion of the conductive pad exposed in the aperture and further extends over the edges of the glassy passivating layer so as to form a seal between the conductive pad and the glassy passivating layer. A subsequent thermal compression bonding operation on such structure does not cause fractures in the glassy passivating layer due to its thickness.Type: GrantFiled: April 17, 1991Date of Patent: October 1, 1991Assignee: International Business Machines Corp.Inventors: Erich Berndlmaier, Gobinda Das, Thomas L. Viau
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Patent number: 4069068Abstract: A method for fabricating bipolar semiconductor devices of large scale integration in which the formation of pipes, which result in shorts or leakages between two conductivity types of the semiconductor devices, is minimized. Prior to forming the emitters in the bipolar transistors, nucleation sites for crystallographic defects such as dislocation loops are formed in the base region near its surface. The emitters are then formed in base regions containing the nucleation sites and the sites are converted into electrically harmless dislocation loops during diffusion of the emitter impurity. Preferably, the nucleation sites are formed by implanting non-doping impurities, such as helium, neon, argon, krypton, xenon, silicon, and oxygen.Type: GrantFiled: July 2, 1976Date of Patent: January 17, 1978Assignee: International Business Machines CorporationInventors: Klaus D. Beyer, Gobinda Das, Michael R. Poponiak, Tsu-Hsing Yeh