Adeia Semiconductor Bonding Technologies Inc.

Agilent Technologies, Inc.

Avago Technologies Fiber IP Pte Ltd.

Panasonic Precision Devices Co., Ltd.

Matt Schwiebert

Yan Zhang

Nels Jewell-Larsen

Piyush Savalia

Kenneth Allen Honer

Hongyu Ran

Ken Honer

Yong M Jeon

Frederik Sporon-Fiedler

An electrohydrodynamic fluid accelerator includes an emitter electrode and leading surfaces of a collector electrode that are substantially exposed to ion bombardment. Heat transfer surfaces downstream of the emitter electrode along a fluid flow path include a first portion not substantially exposed to the ion bombardment that is conditioned with a first ozone reducing material. The leading surfaces of the collector electrode are not conditioned with the first ozone reducing material, but may include a different surface conditioning. The downstream heat transfer surfaces and the leading surfaces can be separately formed and joined to form the unitary structure or can be integrally formed. The electrohydrodynamic fluid accelerator can be used in a thermal management assembly of an electronic device with a heat dissipating device thermally coupled to the conditioned heat transfer surfaces.

Collector-radiator structure for an electrohydrodynamic cooling system

Performance of an electrohydrodynamic fluid accelerator device may be improved and adverse events such as sparking or arcing may be reduced based, amongst other things, on electrode geometries and/or positional interrelationships of the electrodes. For example, in a class of EHD devices that employ a longitudinally elongated corona discharge electrode (often, but not necessarily, a wire), a plurality of generally planar, collector electrodes may be positioned so as to present respective leading surfaces toward the corona discharge electrode. The generally planar collector electrodes may be oriented so that their major surfaces are generally orthogonal to the longitudinal extent of the corona discharge electrode. In such EHD devices, a high intensity electric field can be established in the 'gap' between the corona discharge electrode and leading surfaces of the collector electrodes.

Electrohydrodynamic fluid accelerator device with collector electrode exhibiting curved leading edge profile

In thermal management systems that employ EHD devices to motivate flow of air between ventilated boundary portions of an enclosure, it can be desirable to have some heat transfer surfaces participate in electrohydrodynamic acceleration of fluid flow while providing additional heat transfer surfaces that may not. In some embodiments, both collector electrodes and additional heat transfer surfaces are thermally coupled into a heat transfer path. Collector electrodes then contribute both to flow of cooling air and to heat transfer to the air flow so motivated. The collector electrodes and additional heat transfer surfaces may be parts of a unitary, or thermally coupled, structure that is introduced into a flow path at multiple positions therealong. In some embodiments, the collector electrodes and additional heat transfer surfaces may be proximate each other along the flow path. In some embodiments, the collector electrodes and additional heat transfer surfaces may be separate structures.

Electrohydrodynamic fluid accelerator with heat transfer surfaces operable as collector electrode

Reversible flow may be provided in certain EHD device configurations that selectively energize corona discharge electrodes arranged to motivate flows in generally opposing directions. In some embodiments, a first set of one or more corona discharge electrodes is positioned, relative to a first array of collector electrode surfaces, to when energized, motivate flow in a first direction, while second set of one or more corona discharge electrodes is positioned, relative to a second array of collector electrode surfaces, to when energized, motivate flow in a second direction that opposes the first. In some embodiments, the first and second arrays of collector electrode surfaces are opposing surfaces of individual collector electrodes. In some embodiments, the first and second arrays of collector electrode surfaces are opposing surfaces of respective collector electrodes.

Reversible flow electrohydrodynamic fluid accelerator

The invention provides a 'floating' port assembly of a receptacle of a transceiver. The configuration allows the transmitter port assembly to float conically (e.g., angularly from side to side and up and down) relative to the axial direction of the receptacle sleeve inside of the receptacle when a mechanical load placed on an optical fiber cable connected to the receptacle is transferred to the sleeve of the port assembly. The port assembly has a spring-return mechanism that biases the assembly such that it returns to its original center position when the load is removed. This floating isolates the ferrule of the optical fiber cable and the sleeve of the receptacle from external loadings transmitted via the fiber optic cable. Isolating the ferrule and the sleeve from the external loading dramatically reduces the effects of these external wiggle loads on the optical performance of the transmitter of the transceiver.

Fiber optic transceiver having a floating transmitter port

An apparatus and method for switching optical signal is disclosed. An optical signal switch array includes a plurality of optical switches, each optical switch having a first trench adapted to hold index-matching fluid, and a second trench adapted to hold the index-matching fluid, but initially containing gas, the second trench connected to said first trench. A first expansion chamber is connected to the first trench, the first expansion chamber adapted to hold gas. A second expansion chamber is connected to the second trench, the second expansion chamber adapted to hold gas. To effect switching, the first expansion chamber is heated expanding gas in the first expansion chamber, the expanding gas shifting the index-matching fluid in the first trench to the second trench. Bistability is achieved by the use of capillary action, which passively holds the droplet of working fluid in either of two stable states until actuation.

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San Jose, CA, United States of America

Matt Schwiebert