International Business Machines Corporation

Ryan Joesph Linderman

Thomas J Brunschwiler

Bruno Michel

Erich M Ruetsche

Hugo Eric Rothuizen

Urs Kloter

Nils Deneke Hoivik

Nils D Hoivik

Reto Waelchli

A series of hierarchical channels are formed in a first member surface of a first member using a continuous-feed manufacturing process. The channels are configured to control particle stacking. The first member is pressed to a second member with a layer of particle-filled viscous material between the first member surface and a second member surface of the second member. An inventive assembly includes mating surfaces with at least one surface formed with a series of parallel hierarchical channels configured to control stacking of the particles during pressing together of the surfaces. The surface is substantially free of any other hierarchical channels formed thereon.

One-dimensional hierarchical nested channel design for continuous feed manufacturing processes

A cooling device has a large number of closely spaced impinging jets, adjacent an impingement gap, with parallel return paths for supplying coolant flow for the impinging jets with the least possible pressure drop using an interdigitated, branched hierarchical manifold. Surface enhancement features spanning the impingement gap form U-shaped microchannels between single impinging jets and single outlets.

Cooling device

Disclosed herein is a data center having a plurality of liquid cooled computer systems. The computer systems each include a processor coupled with a cold plate that allows direct liquid cooling of the processor. The cold plate is further arranged to provide adapted flow of coolant to different portions of the processor whereby higher temperature regions receive a larger flow rate of coolant. The flow is variably adjusted to reflect different levels of activity. By maximizing the coolant temperature exiting the computer systems, the system may utilize the free cooling temperature of the ambient air and eliminate the need for a chiller. A data center is further provided that is coupled with a district heating system and heat is extracted from the computer systems is used to offset carbon emissions and reduce the total cost of ownership of the data center.

Variable flow computer cooling system for a data center and method of operation

Integrated circuit-chip hot spot temperatures are reduced by providing localized regions of higher thermal conductivity in the conductive material interface at pre-designed locations by controlling how particles in the thermal paste stack- or pile-up during the pressing or squeezing of excess material from the interface. Nested channels are used to efficiently decrease the thermal resistance in the interface, by both allowing for the thermally conductive material with a higher particle volumetric fill to be used and by creating localized regions of densely packed particles between two surfaces.

Method of obtaining enhanced localized thermal interface regions by particle stacking

Disclosed herein is a server system having a plurality of computer systems and a liquid cooling system. The computer systems are capable of operating in a first mode of operation at a first operating speed and a first temperature. The computer systems are further capable of operating in a second mode of operation at a second operating speed and a second temperature. The server system switches from the second mode and the first mode in response to a request for processing services rising above a first threshold. The server system further uses a cold battery to store coolant during times of low demand and releases coolant from said cold battery when the system switches to the first mode.

Variable performance server system and method of operation

A stress release thermal interface is provided for preventing the building up of stress between chip and heat sink surfaces in a multi-chip module (MCM) while maintaining reliable thermal and mechanical contact. The interface achieves enhanced thermal conduction by using flexible, interlocking posts attached to the surfaces of the chip and the heat sink.

Semiconductor chip assembly with flexible metal cantilevers

An interface is formed by pressing a patterned first surface and a second surface together, with a particle-loaded interface material in between. The first surface is fabricated with a pattern of channels designed to redistribute the velocity gradients that occur in the interface material during interface formation in order to control the arrangement, orientation and concentration of particles at the end of the interface formation. The concept finds application in thermal interfaces and controlled placement of nano and micro particles and biological molecules.

Growing community of inventors

Zurich, Switzerland

Ryan Joesph Linderman