摘要:
A method and an apparatus for providing a planar and compliant interface between a semiconductor chip and its supporting substrate to accommodate for the thermal coefficient of expansion mismatch therebetween. The complaint interface is comprised of a plurality of compliant pads defining channels between adjacent pads. The pads are typically compressed between a flexible film chip carrier and the chip. A compliant filler is further disposed within the channels to form a uniform encapsulation layer having a controlled thickness.
摘要:
A method and an apparatus for providing a planar and compliant interface between a semiconductor chip and its supporting substrate to accommodate for the thermal coefficient of expansion mismatch therebetween. The compliant interface is comprised of a plurality of compliant pads defining channels between adjacent pads. The pads are typically compressed between a flexible film chip carrier and the chip. A compliant filler is further disposed within the channels to form a uniform encapsulation layer having a controlled thickness.
摘要:
A semiconductor chip connection component is provided with an adhesive, desirably in a solid, non-tacky condition on its bottom surface. The adhesive may be present in a pattern covering less than all of the component bottom surface, so as to provide a void-free interface when the adhesive bonds the component to the top surface of a chip. The adhesive desirably is brought to a flowable condition by heat transferred from the chip itself. The connection component may include leads having base metal strips in a trace area underlying the top surface and noble metal portions protruding beyond an edge of the top layer. A flowable, curable material encapsulates the base metal sections. Because the base metal sections desirably are free of undercuts, the same can be encapsulated in a void-free manner during formation of the component.
摘要:
A semiconductor chip connection component is provided with an adhesive, desirably in a solid, non-tacky condition on its bottom surface. The adhesive may be present in a pattern covering less than all of the component bottom surface, so as to provide a void-free interface when the adhesive bonds the component to the top surface of a chip. The adhesive desirably is brought to a flowable condition by heat transferred from the chip itself. The connection component may include leads having base metal strips in a trace area underlying the top surface and noble metal portions protruding beyond an edge of the top layer. A flowable, curable material encapsulates the base metal sections. Because the base metal sections desirably are free of undercuts, the same can be encapsulated in a void-free manner during formation of the component.
摘要:
Filled, curable siloxane encapsulant compositions containing a curable siloxane base resin with functional groups reactive with functional groups of a hardener compound to form a polysiloxane, and filler particles with surface functional groups reactive with the hardener compound functional groups, wherein the filler particles have at least a bi-modal particle packing distribution of first filler particles having a first diameter and second filler particles having a second diameter smaller than the first diameter, and the first and second filler particles are present in amounts effective to provide a particle packing distribution with a relative bulk volume of at least about 90 percent. Tri-modal particle packing distributions of the first and second filler particles with third filler particles having a third diameter smaller than the second diameter are preferred, with the first, second and third filler particles being present in amounts effective to provide a tri-modal particle packing distribution with a relative bulk volume of at least about 95 percent. Encapsulant kits, cured encapsulant compositions in which filler particles are individually covalently bonded to one or more polysiloxane polymer chains, microelectronic assemblies incorporating the cured encapsulant compositions, and methods for preparing the curable encapsulant compositions are also disclosed.
摘要:
A semiconductor chip connection component is provided with an adhesive, desirably in a solid, non-tacky condition on its bottom surface. The adhesive may be present in a pattern covering less than all of the component bottom surface, so as to provide a void-free interface when the adhesive bonds the component to the top surface of a chip. The adhesive desirably is brought to a flowable condition by heat transferred from the chip itself. The connection component may include leads having base metal strips in a trace area underlying the top surface and noble metal portions protruding beyond an edge of the top layer. A flowable, curable material encapsulates the base metal sections. Because the base metal sections desirably are free of undercuts, the same can be encapsulated in a void-free manner during formation of the component.
摘要:
A semiconductor chip connection component is provided with an adhesive, desirably in a solid, non-tacky condition on its bottom surface. The adhesive may be present in a pattern covering less than all of the component bottom surface, so as to provide a void-free interface when the adhesive bonds the component to the top surface of a chip. The adhesive desirably is brought to a flowable condition by heat transferred from the chip itself. The connection component may include leads having base metal strips in a trace area underlying the top surface and noble metal portions protruding beyond an edge of the top layer. A flowable, curable material encapsulates the base metal sections. Because the base metal sections desirably are free of undercuts, the same can be encapsulated in a void-free manner during formation of the component.
摘要:
A semiconductor chip packaging assembly comprising a frame having a central aperture, a flexible substrate attached to the frame across the central aperture, and a unitary support structure having a plurality of apertures therethrough attached to the substrate within the central aperture of the frame with at least some of the substrate terminals underlying the unitary support structure. A chip is disposed within each aperture and attached to the substrate with the electrical contacts of the chip connected to the substrate terminals. A compliant layer is disposed between the substrate and the unitary support structure and between the substrate and 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:
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.