摘要:
A component incorporating a dielectric element such as a polymeric film with leads and terminals thereon is assembled with a semiconductor chip and bond regions of the leads are connected to contacts of the chip. At least one lead incorporates a plural set of connecting regions connecting the bond region of that lead to a plurality of terminals. One or more of the connecting regions in each such plural set are severed so as to leave less than all of the terminals associated with each such plural set connected to the contacts of the chip.
摘要:
Semiconductor chip packages and methods of fabricating the same. The package includes a thermally conductive protective structure having an indentation open to a front side and a flange surface at least partially surrounding the indentation and facing to the front of the structure. A chip is disposed in the indentation so that the front surface of the chip, with contacts thereon, faces toward the front of the structure. A flexible dielectric film having terminals thereon is placed on the flange surface, and a compliant material is disposed between the film and the flange surface. The terminals on the film are connected to the contacts on the chip. The individual terminals on the film are movable with respect to the protective structure, which facilitates mounting and compensation for thermal expansion.
摘要:
The present invention provides a method for fabricating a compliant microelectronic device package and an associated apparatus for substantially obviating thermal, compliancy and interconnection problems. Flexible, dielectric layers are used having on a first surface a plurality conductive leads which are each electrically coupled at a first end to at least one conductive pad also coupled to the first surface of the dielectric layers. A second end of the conductive leads are further coupled between the dielectric layers across a bonding gap. A compliant layer is then coupled to the bottom surface of the dielectric layers. One of the dielectric layers is coupled to the surface of a die by one of the compliant layer such that the die bond pads are juxtaposed with respective leads in the bonding gap. This assembly is attached to a protective structure and is encapsulated. A solder mask may be placed over the exposed surface of the dielectric layers to cover the leads and prevent shoring. Further, a conductive layer may be used in the package as a ground layer of a voltage reference layer.
摘要:
The present invention provides an interconnection scheme having complaint contacts arranged in an array to connect conductive surfaces on a microelectronic device and a supporting substrate, such as a printed circuit board. This invention accommodates for the difference in thermal coefficients of expansion between the device and the supporting substrate. Typically, an area array of conductive contact pads are connected into rows by conductive leads on a flexible, intermediate substrate. Each of the conductive leads bridges a bonding hole in the intermediate substrate which is situated between successive contact pads. Each of the conductive leads further has a frangible portion within or near each bonding hole. A stand-off between the intermediate substrate and the device is create by compliant dielectric pads, typically composed of an elastomer material, positioned under each contact pad. The frangible portions allow the leads to be cleanly broken, bent and secured into electrical contact with chip contacts on the device. Each of these connections may be supported by a compliant layer, typically an uncured elastomer which fills the area around the compliant dielectric pads and is then cured.
摘要:
A semiconductor chip connection component having numerous leads extending side-by-side across a gap in a support structure, each lead having a frangible section to permit detachment of one end of the lead from the support structure in a bonding process. The frangible sections are formed by treating the lead-forming material in an elongated treatment zone extending across the regions occupied by numerous leads. The process avoids the need for especially fine etching to form notches in the lateral edges of the leads.
摘要:
A method of encapsulating a semiconductor device. The encapsulation method includes a semiconductor chip package assembly having a spacer layer between a top surface of a sheet-like substrate and a contact bearing surface of a semiconductor chip, wherein the substrate has conductive leads thereon, the leads being electrically connected to terminals on a first end and bonded to respective chip contacts on a second end. Typically, the spacer layer is comprised of a compliant or elastomeric material. A protective layer is attached on a bottom surface of the substrate so as to cover the terminals on the substrate. A flowable, curable encapsulant material is deposited around a periphery of the semiconductor chip after the attachment of the protective layer so as to encapsulate the leads. The encapsulant material is then cured. Typically, this encapsulation method is performed on a plurality of chip assemblies simultaneously.
摘要:
A connection component for use in making microelectronic element assemblies which has peelable leads that are formed on a dielectric support structure. One end of each lead is permanently connected to the support structure and the opposite end of the lead is releasably connected to the support structure. When the releasable end of the lead is bonded to a contact on a semiconductor chip, the releasable end of the lead can be peeled from the support structure such that the chip may be moved away from the support structure. A compliant layer may be disposed between the chip and the support structure. If a compliant material is injected between the chip and the support structure to form the compliant layer, the compliant material will lift the chip away from the support structure and facilitate the peeling of the leads from the support structure.
摘要:
A connection component for use in making microelectronic element assemblies, has peelable leads that are formed on a dielectric support structure. One end of each lead is permanently connected to the support structure and the opposite end of the lead is releasably connected to the support structure. When the releasable end of the lead is bonded to a contact on a semiconductor chip, the releasable end of the lead can be peeled from the support structure such that the chip may be moved away from the support structure. A compliant layer may be disposed between the chip and the support structure. If a compliant material is injected between the chip and the support structure to form the compliant layer, the compliant material will lift the chip away from the support structure and facilitate the peeling of the leads from the support structure.
摘要:
The present invention provides an interconnection scheme having compliant contacts arranged in an array to connect conductive surfaces on a microelectronic device and a supporting substrate, such as a printed circuit board. This invention accommodates for the difference in thermal coefficients of expansion between the device and the supporting substrate. Typically, an area array of conductive contact pads are connected into rows by conductive leads on a flexible, intermediate substrate. Each of the conductive leads bridges a bonding hole in the intermediate substrate which is situated between successive contact pads. Each of the conductive leads further has a frangible portion within or near each bonding hole. A stand-off between the intermediate substrate and the device is create by compliant dielectric pads, typically composed of an elastomer material, positioned under each contact pad. The frangible portions allow the leads to be cleanly broken, bent and secured into electrical contact with mating contact pads on the device. Each of these connections may be supported by a compliant layer, typically an uncured elastomer which fills the area around the dielectric pads and is then cured.
摘要:
A semiconductor chip connection component having numerous leads extending side-by-side across a gap in a support structure, each lead having a frangible section to permit detachment of one end of the lead from the support structure in a bonding process. The frangible sections are formed by treating the lead-forming material in an elongated treatment zone extending across the regions occupied by numerous leads. The process avoids the need for especially fine etching to form notches in the lateral edges of the leads.