Abstract:
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.
Abstract:
The present invention stacks integrated circuits into modules that conserve board surface area. In a precursor assembly devised as a component for a stacked circuit module in accordance with a preferred embodiment of the present invention, one or more stiffeners are disposed at least partially between a flex circuit and an integrated circuit. In a two-high stacked circuit module devised in accordance with a preferred embodiment of the present invention, an integrated circuit is stacked above a precursor assembly. The two integrated circuits are connected with the flex circuit of the precursor assembly. The present invention may be employed to advantage in numerous configurations and combinations of integrated circuits in modules.
Abstract:
The present invention stacks chip scale-packaged integrated circuits (CSPs) into modules that conserve PWB or other board surface area. In a preferred embodiment in accordance with the invention, a form standard associated with one or more CSPs provides a 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. In a preferred embodiment, the contacts of the lower CSP will be compressed before flex circuitry is attached to a combination of the CSP and a form standard to create lower profile contacts between CSP and the flex circuitry.
Abstract:
A circuit module is provided in which at least one secondary substrate and preferably two such secondary substrates are populated with integrated circuits (ICs). A rigid core substrate for the circuit module is comprised of a structural member and a connective member. In a preferred embodiment, the structural member is comprised of thermally conductive material while the connective member is comprised of conventional PWB material. The secondary substrate(s) are connected to the connective member with a variety of techniques and materials while, in a preferred embodiment, the connective member exhibits, in a preferred embodiment, traditional module contacts which provide an edge connector capability to allow the module to supplant traditional DIMMs.
Abstract:
The present invention provides a system and method for employing leaded packaged memory devices in memory cards. Leaded packaged ICs are disposed on one or both sides of a flex circuitry structure to create an IC-populated structure. In a preferred embodiment, leads of constituent leaded IC packages are configured to allow the lower surface of the leaded IC packages to contact respective surfaces of the flex circuitry structure. Contacts for typical embodiments are supported by a rigid portion of the flex circuitry structure and the IC-populated structure is disposed in a casing to provide card structure for the module.
Abstract:
The present invention stacks integrated circuit packages into circuit modules. In a preferred embodiment, solder paste and primary adhesive respectively are applied to selected locations on the flex circuitry. Supplemental adhesive is applied to add ional locations on the flex circuitry, CSP, or other component. The flex circuitry and the CSP are brought into proximity with each other. During solder reflow operation, a force is applied and the CSP collapses toward the flex circuitry, displacing the primary adhesive and the supplemental adhesive. The supplemental adhesive establishes a bond providing additional support to the flex circuitry. In another embodiment, CSPs or other integrated circuit packages are bonded to each other or to other components with a combination of adhesives. A rapid bond adhesive maintains alignment of the bonded packages and/or components during assembly, and a structural bond adhesive provides additional strength and/or structural integrity to the bond.
Abstract:
An interposer is provided having an array of surface mount pads along the upper side and an array of BGA (ball grid array) contacts on the lower side. A module of one or more leaded packaged ICs (integrated circuits) is mounted to the array of surface mount pads. The one or more leaded packaged integrated circuits are thereby adapted for connection to a BGA footprint. Various alternative embodiments for stacking the leaded packaged ICs, controlling thermal performance, and interconnecting with the interposer are disclosed.
Abstract:
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 bailout 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.
Abstract:
The present invention stacks integrated circuits (ICs) into modules that conserve PWB or other board surface area. In another aspect, the invention provides a lower capacitance memory expansion addressing system and method and preferably with the CSP stacked modules provided herein. In a preferred embodiment in accordance with the invention, a form standard provides a 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. In a preferred embodiment, the form standard will be devised of heat transference material such as copper to improve thermal performance. In a preferred embodiment of the memory addressing system, a high speed switching system selects a data line associated with each level of a stacked module to reduce the loading effect upon data signals in memory access.
Abstract:
The present invention stacks chip scale-packaged integrated circuits (CSPs) into modules that conserve PWB or other board surface area. The CSPs employed in stacked modules devised in accordance with the present invention are connected with flex circuitry. That flex circuitry may exhibit one or more conductive layers with preferred embodiments having two conductive layers. A form standard is disposed along the lower planar surface and extends laterally beyond the package of one or more CSPs in a stacked module. The form standard provides a 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. In a preferred embodiment, the form standard will be comprised of heat conductive material such as copper, for example.