Modularized die stacking system and method

US7485951B2 · kind B2 · utility

Assignee

• Entorian Technologies, Inc · US

Inventors

• David Roper · Austin, US
• Curtis Hart · Round Rock, US
• James Wilder · Austin, US
• Phill Bradley · Pflugerville, US
• James Cady · Austin, US
• Jeff Buchle · Austin, US
• James Wehrly · Austin, US

Key dates

• Filing date: May 9, 2003
• Grant date: Feb 3, 2009
• Expiry date: Jan 3, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05K2201/10734
• WIPO field: Semiconductors
• WIPO sector: Electrical engineering

Abstract

An IC die and a flexible circuit structure are integrated into a lower stack element that can be stacked with either further integrated lower stack element iterations or with pre-packaged ICs in any of a variety of package types. The present invention may be employed to stack similar or dissimilar integrated circuits and may be used to create modularized systems. In a preferred embodiment, a die is positioned above the surface of portions of a pair of flex circuits. Connection is made between the die and the flex circuitry. A protective layer such as a molded plastic, for example, is formed to protect the flex-connected die and its connection to the flex. Connective elements are placed along the flex circuitry to create an array of module contacts along the second side of the flex circuitry. The flex circuitry is positioned above the body-protected die to create an integrated lower stack element. The integrated lower stack element may be stacked either with iterations of the integrated lower stack element or with a pre-packaged IC to create a multi-element stacked circuit module.