Staktek Group L.p.

Entorian Technologies LP

Julian Dowden

James G Wilder

James W Cady

David Roper

Jeff Buchle

James Douglas Wehrly, Jr

Carmen D Burns

Russell Rapport

The present invention stacks chip scale-packaged integrated circuits (CSPs) into modules that conserve PWB or other board surface area. In a two-high CSP stack or module devised in accordance with a preferred embodiment of the present invention, two CSPs are stacked, with one CSP disposed above the other. The two CSPs are connected with flex circuitry. A form standard is disposed between the flex circuitry and a CSP in the stack. The form standard can take many configurations and may be used where flex circuits are used to connect CSPs to one another in stacked modules having two or more constituent CSPs. For example, in stacked modules that include four CSPs, three form standards are employed in preferred embodiments, although fewer may be used. The form standard provides a thermally conductive physical form that allows many of the varying package sizes found in the broad family of CSP packages to be used to advantage while employing a standard connective flex circuitry design.

Stacking system and method

The present invention stacks integrated circuits into modules that conserve board surface area. In a two-high stack or module devised in accordance with a preferred embodiment of the present invention, a pair of integrated circuits is stacked, with one integrated circuit above the other. The two integrated circuits are connected with a pair of flexible circuit structures. Each of the pair of flexible circuit structures is partially wrapped about a respective opposite lateral edge of the lower integrated circuit of the module. The flex circuit pair connects the upper and lower integrated circuits and provides a thermal and electrical path connection path between the module and its application environment. The module has a bailout pattern with a different pitch and/or supplemental module contacts devised to allow combined signaling to the integrated circuits through contacts having a desired ballout footprint. The present invention may be employed to advantage in numerous configurations and combinations of integrated circuits in modules provided for high-density memories or high capacity computing.

Pitch change and chip scale stacking system and method

The present invention stacks integrated circuits into modules that conserve board surface area. In a two-high stack or module devised in accordance with a preferred embodiment of the present invention, a pair of integrated circuits is stacked, with one integrated circuit above the other. The two integrated circuits are connected with a pair of flexible circuit structures. Each of the pair of flexible circuit structures is partially wrapped about a respective opposite lateral edge of the lower integrated circuit of the module. The flex circuit pair connects the upper and lower integrated circuits and provides a thermal and electrical path connection path between the module and its application environment. The module has a ballout pattern with a different pitch and/or supplemental module contacts devised to allow combined signaling to the integrated circuits through contacts having a desired ballout footprint. The present invention may be employed to advantage in numerous configurations and combinations of integrated circuits in modules provided for high-density memories or high capacity computing.

Pitch change and chip scale stacking system

Provided is a system and method for selectively stacking and interconnecting integrated circuit devices having a data path of n-bits to create a high-density integrated circuit module having a data path of greater than n-bits. Integrated circuits are vertically stacked one above the other. Where the constituent IC elements have a data path of n-bits in width, a module devised in accordance with a preferred embodiment of the present invention presents a data path 2n-bits wide. In a preferred embodiment, an interconnection frame comprised of printed circuit board material is disposed about two similarly oriented ICs to provide interconnectivity of the constituent ICs and concatenation of their respective data paths. An array of clip-leads or other connectors are appended to module connection pads to provide lead-like structures for connection of the module to its operating environment. In a two-high stack, address lines of the constituent ICs are interconnected, while the data lines of the respective ICs are concatenated to double the data path width of the stack relative to the data path width of the constituent ICs. In an alternative preferred embodiment, two facially juxtaposed TSOP ICs are surface mounted to an interconnection body laterally positioned between the ICs. The interconnection body has IC connection pads and a set of module connection pads for connection of the module. The interconnection body has a network of connections that interconnects the address lines of the constituent ICs and concatenates the data lines to double the data path width of the stack relative to the data path width of the ICs from which the stack is composed.

Wide data path stacking system and method

A system and method for selectively stacking and interconnecting individual integrated circuit devices to create a high density integrated circuit module. Connections between stack elements are made through carrier structures that provide inter-element connections that substantially follow an axis that is substantially perpendicular to the vertical axis of the stack. The carrier structure provides connection between elements through conductive paths disposed to provide connection between the foot of an upper IC element and the upper shoulder of the lower IC element. This leaves open to air flow most of the vertical transit section of the lower lead for cooling while creating an air gap between elements that encourages cooling airflow between the elements of the stack. A method for creating stacked integrated circuit modules according to the invention is provided.

The present invention stacks chip scale-packaged integrated circuits (CSPs) into modules that conserve board surface area. In a two-high CSP stack or module devised in accordance with a preferred embodiment of the present invention, a pair of CSPs is stacked, with one CSP above the other. The two CSPs are connected with a pair of flexible circuit structures. Each of the pair of flexible circuit structures is partially wrapped about a respective opposite lateral edge of the lower CSP of the module. The flex circuit pair connects the upper and lower CSPs and provides a thermal and electrical connection path between the module and an application environment such as a printed wiring board (PWB). The present invention may be employed to advantage in numerous configurations and combinations of CSPs in modules provided for high-density memories or high capacity computing.

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Austin, TX, United States of America

Julian Dowden