International Business Machines Corporation

Maurice McGlashan-Powell

Daniel C Edelstein

Eugene John O'Sullivan

Timothy Joseph Dalton

Claudius Feger

George Frederick Walker

Sung Kwon Kang

Philip Charles Danby Hobbs

Valentina Salapura

Michael A Gaynes

Sandra Guy Malhotra

Chandrasekhar Narayan

Edward John Yarmchuk

Carlos Juan Sambucetti

Mahadevaiyer Krishnan

Charles Thomas Black

Nicholas C M Fuller

John Gerard Gaudiello

Soojae Park

Gian-Luca Bona

Roland Germann

Ijeoma M Nnebe

Sampath Purushothaman

Stephen McConnell Gates

Kevin Shawn Petrarca

Satyanarayana Venkata Nitta

Harold John Hovel

Robert L Sandstrom

Keith Randal Pope

Stanley Joseph Whitehair

Daniel Guidotti

Philip C D Hobbs

Robert L Sandstorm

Philip O D Hobbs

A system and method for optical switching of networks in a multi-node computing system with programmable magneto-optical switches that enable optical signal routing on optical pathways. The system includes a network of optical links interconnecting nodes with switching elements that are controlled by electrical control signals. Data transmission is along the optical links and an optical pathway is determined by the electrical control signals which are launched ahead of optical signal. If links are available, an optical pathway is reserved, and the electrical signal sets the necessary optical switches for the particular optical pathway. There is thereby eliminated the need for optical-electrical-optical conversion at each node in order to route data packets through the network. If a link or optical pathway is not available the system tries to find an alternative path. If no alternative path is available, the system reserves buffering. After transmission, all reservations are released.

Multi-node system networks with optical switches

A heat spreader or lid for a microelectronic package, in which the heat spreader has an underside surface that includes at least one curvilinear contour, in which the curvilinear contour is selected from at least one positive or protruding curvilinear feature, at least one negative or recessed curvilinear feature, and a combination thereof. A microelectronic package that includes the heat spreader/lid, in which there is improved heat dissipation or reduced mechanical stress in an interface between the heat spreader/lid and a circuit chip.

Curvilinear heat spreader/lid with improved heat dissipation

A method of manufacturing a thermal paste, in which the method includes feeding the thermal paste into a chamber of an extruder; mixing the thermal paste at elevated temperatures; de-airing the thermal paste; and extruding the thermal paste out of the chamber through a die as a pre-form or into a cartridge, such that air channels and pseudo-grain boundaries are prevented from forming in the thermal paste.

Vacuum extrusion method of manufacturing a thermal paste

An indium cap layer is formed by blanket depositing indium onto a surface of metallic interconnects separated by interlayer dielectric, and then selectively chemically etching the indium located on the interlayer dielectric leaving an indium cap layer. Etchants containing a strong acid are provided for selectively removing the indium.

Method for forming an indium cap layer

A heat transfer control structure and a method for fabrication thereof includes at least one heat transfer control layer interposed between and contacting a heat source material and a heat sink material. The at least one heat transfer control layer is selected predicated upon thermal phonon spectra overlap between the heat source material, the at least one heat transfer control layer and the heat sink material. The at least one heat transfer control layer may enhance or retard heat transfer between the heat source material and the heat sink material. The at least one heat transfer control layer may be selected based upon a value of a thermal phonon correlating parameter such as a Debye temperature, a density or a lattice constant.

Heat transfer control structures using thermal phonon spectral overlap

A method in effectuating the redirection of light which is propagated within a waveguide, and which eliminates the necessity for a bending of the waveguide, or the drawbacks encountered in directional changes in propagated light involving the need for sharp curves of essentially small-sized radii, which would resultingly lead to excessive losses in light. In this connection, the method relates to the fabricating and the provision of a wire-grid polarization beam splitter within an optical waveguide, which utilizes a diblock copolymer template to formulate the wire-grid.

Waveguide polarization beam splitters and method of fabricating a waveguide wire-grid polarization beam splitter

A single-mode optical waveguide with a core, surrounded by a cladding consisting of an inner soft layer and an outer harder layer is described. The outer layer has a grating structure on its inner surface, whose spatial frequency is the same as that of the guided mode. The thickness of the inner cladding is sufficient to keep the grating outside the mode field in undeformed regions of the waveguide, so that normally no out-coupling of the light results. Connections are made by crossing two such waveguides at an angle and pressing them together. This results in deformation of the two waveguides such that the gratings are brought into proximity with the cores. Light is coupled out of one waveguide and into the other in the deformed region, resulting in a self-aligning optical connection. The out-coupled light propagates normal to the waveguide axis, so errors in the crossing angle cause little change in efficiency. Because the cladding system is sufficiently resilient to recover after deformation, the connection is remakeable.

Apparatus and methods for remakeable connections to optical waveguides

An apparatus (and method) for launching a modulated optical signal, includes a waveguide, an antenna structure for communicating with the waveguide and with an externally-applied optical field and having an output port, and an electrically-variable-impedance device connected at the antenna's output port, capable of responding at a frequency of an externally-applied optical field and having its impedance at the optical frequency changed by an applied electrical signal.

Apparatus and method for optical interconnection

A method to selectively cap interconnects with indium or tin bronzes and copper oxides thereof is provided. The invention also provides the interconnect and copper surfaces so formed.

Method to selectively cap interconnects with indium or tin bronzes and/or oxides thereof and the interconnect so capped

A system and method are disclosed for an optical backplane in an electronic processor that comprises of a plurality of processing units. The backplane is comprising of a network of optical waveguides which can guide polarized light. Furthermore, the backplane has magneto optic routers for steering light at the vertexes of the network, and the backplane also has optical devices for operationally connecting the processing units to the network. The backplane network affords an optical interconnection amongst all of the processing units.

Magneto-optical switching backplane for processor interconnection

Growing community of inventors

Mount Vernon, NY, United States of America

Maurice McGlashan-Powell