Chip stack structures that implement two-phase cooling with radial flow

US9941250B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Thomas J. Brunschwiler · Thalwil, CH
• Evan G. Colgan · Chestnut Ridge, US
• John U. Knickerbocker · Wappingers Falls, US
• Bruno Michael · Zürich, CH
• Chin Lee Ong · Horgen, CH
• Cornelia K. Tsang · Potsdam, US

Key dates

• Filing date: Jan 11, 2017
• Grant date: Apr 10, 2018
• Expiry date: Jan 11, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2225/06593
• WIPO field: Semiconductors
• WIPO sector: Electrical engineering

Abstract

A package structure to implement two-phase cooling includes a chip stack disposed on a substrate, and a package lid that encloses the chip stack. The chip stack includes a plurality of conjoined chips, a central inlet manifold formed through a central region of the chip stack, and a peripheral outlet manifold. The central input manifold includes inlet nozzles to feed liquid coolant into flow cavities formed between adjacent conjoined chips. The peripheral outlet manifold outputs heated liquid and vapor from the flow cavities. The package lid includes a central coolant supply inlet aligned to the central inlet manifold, and a peripheral liquid-vapor outlet to output heated liquid and vapor that exits from the peripheral outlet manifold. Guiding walls may be included in the flow cavities to guide a flow of liquid and vapor, and the guiding walls can be arranged to form radial flow channels that are feed by different inlet nozzles of the central inlet manifold.