摘要:
Circuit structures and methods of fabrication are provided for facilitating implementing a complete electronic system in a compact package. The circuit structure includes, in one embodiment, a chips-first multichip base layer with conductive structures extending therethrough. An interconnect layer is disposed over the front surface of the multichip layer and includes interconnect metallization electrically connected to contact pads of the chips and to conductive structures extending through the structural material. A redistribution layer, disposed over the back surface of the multichip layer, includes a redistribution metallization also electrically connected to conductive structures extending through the structural material. Input/output contacts are arrayed over the redistribution layer, including over the lower surfaces of at least some integrated circuit chips within the multichip layer, and are electrically connected through the redistribution metallization, conductive structures, and interconnect metallization to contact pads of the integrated circuit chips of the multichip layer.
摘要:
Circuit structures and methods of fabrication are provided for facilitating implementing a complete electronic system in a compact package. The circuit structure includes, in one embodiment, a chips-first multichip base layer with conductive structures extending therethrough. An interconnect layer is disposed over the front surface of the multichip layer and includes interconnect metallization electrically connected to contact pads of the chips and to conductive structures extending through the structural material. A redistribution layer, disposed over the back surface of the multichip layer, includes a redistribution metallization also electrically connected to conductive structures extending through the structural material. Input/output contacts are arrayed over the redistribution layer, including over the lower surfaces of at least some integrated circuit chips within the multichip layer, and are electrically connected through the redistribution metallization, conductive structures, and interconnect metallization to contact pads of the integrated circuit chips of the multichip layer.
摘要:
Structures and methods are provided for electrically interconnecting and absorbing stress between a first electrical structure and a second electrical structure. In one embodiment, non-conductive compliant bumps are disposed on at least one of the structures and a metal layer is provided over a surface of the non-conductive compliant bumps. The metal layer facilitates electrical coupling of the metal on the surfaces of the compliant bumps with multiple contact pads of the structure supporting the bumps. The non-conductive compliant bumps can be fabricated of a low modulus material which has a high ultimate elongation property (LMHE dielectric). The LMHE dielectric can have a Young's modulus of less than 50,000 psi and an ultimate elongation property of at least twenty percent. In an alternate embodiment, at least one mushroom-shaped conductive bump is disposed above a compliant dielectric layer on one of the first electrical structure or the second electrical structure. The mushroom-shaped conductive bumps are employed to electrically interconnect the first and second electrical structures. The compliant dielectric layer can be a LMHE dielectric.
摘要:
Chips first packaging structures and methods of fabrication are presented which employ electroless metallizations. An electroless barrier metal is disposed over and in electrical contact with at least one aluminum contact pad of the chips first integrated circuit. The electroless barrier metal is a first electroless metal and is a different material than the at least one aluminum contact pad. An electroless interconnect metal is disposed above and electrically contacts the electroless barrier metal. The electroless interconnect metal is a second electroless metal, which is different from the first electroless metal. As an example, the electroless barrier metal comprises electroless nickel and the electroless interconnect metal comprises electroless copper.
摘要:
Methods of fabricating a circuit structure are provided. The fabrication method includes: forming a chip layer, which includes obtaining at least one chip and disposing a structural material around and physically contacting the side surface(s) of each chip in the chip layer. The structural material has an upper surface substantially coplanar with or parallel to an upper surface of each chip and defines at least a portion of a front surface of the chip layer, and has a lower surface substantially coplanar with or parallel to a lower surface of each chip, which defines at least portion of a back surface of the chip layer. The method further includes forming at least one strengthening structure over the back surface of the chip layer. The strengthening structure is formed to strengthen an interface between the chip(s) and the structural material.
摘要:
Stackable circuit structures and methods of fabrication are provided employing first level metallization directly on a chips-first layer(s), which includes: a chip(s), each with a pad mask over its upper surface and openings exposing its contact pads; electrically conductive structures; and structural dielectric material surrounding the side surfaces of the chips and the conductive structures. Each chips-first layer further includes a metallization layer on the front surface of the layer, residing at least partially on the pad mask and extending over an edge of the chip. Together, the pad mask and the structural material electrically isolate the metallization layer from the chip. Input/output interconnect structures physically and electrically contact the metallization layer over the front surface and/or the lower surfaces of the electrically conductive structures at the back surface of the chips-first layer, to facilitate input/output connection to chips of the layers in a stack.
摘要:
Circuit structures and methods of fabrication are provided for facilitating implementing a complete electronic system in a compact package. The circuit structure includes, in one embodiment, a chips-first multichip base layer with conductive structures extending therethrough. An interconnect layer is disposed over the front surface of the multichip layer and includes interconnect metallization electrically connected to contact pads of the chips and to conductive structures extending through the structural material. A redistribution layer, disposed over the back surface of the multichip layer, includes a redistribution metallization also electrically connected to conductive structures extending through the structural material. Input/output contacts are arrayed over the redistribution layer, including over the lower surfaces of at least some integrated circuit chips within the multichip layer, and are electrically connected through the redistribution metallization, conductive structures, and interconnect metallization to contact pads of the integrated circuit chips of the multichip layer.
摘要:
Structures and methods are provided for absorbing stress between a first electrical structure and a second electrical structure connected together, wherein the first and second structures have different coefficients of thermal expansion. A dielectric material is disposed on at least one of the first and second electrical structures. This dielectric material is a low modulus material which has a high ultimate elongation property (LMHE dielectric). Preferably, the LMHE dielectric has a Young's modulus of less than 50,000 psi and an ultimate elongation property of at least 20 percent. The LMHE dielectric can be photo patternable to facilitate formation of via openings therein and a metal layer is formed above the LMHE dielectric which has conductors capable of expanding or contracting with the dielectric. Conductors of the metal layer disposed above the dielectric and connected to vias in the dielectric have a length significantly greater than the maximum displacement due to thermal expansion between the first and second electrical structures, e.g., a length which is at least five times the displacement.
摘要:
Circuit structures and methods of fabrication are provided for facilitating implementing a complete electronic system in a compact package. The circuit structure includes, in one embodiment, a chips-first multichip base layer with conductive structures extending therethrough. An interconnect layer is disposed over the front surface of the multichip layer and includes interconnect metallization electrically connected to contact pads of the chips and to conductive structures extending through the structural material. A redistribution layer, disposed over the back surface of the multichip layer, includes a redistribution metallization also electrically connected to conductive structures extending through the structural material. Input/output contacts are arrayed over the redistribution layer, including over the lower surfaces of at least some integrated circuit chips within the multichip layer, and are electrically connected through the redistribution metallization, conductive structures, and interconnect metallization to contact pads of the integrated circuit chips of the multichip layer.
摘要:
Circuit structures and methods of fabrication are provided for facilitating implementing a complete electronic system in a compact package. The circuit structure includes, in one embodiment, a chips-first multichip base layer with conductive structures extending therethrough. An interconnect layer is disposed over the front surface of the multichip layer and includes interconnect metallization electrically connected to contact pads of the chips and to conductive structures extending through the structural material. A redistribution layer, disposed over the back surface of the multichip layer, includes a redistribution metallization also electrically connected to conductive structures extending through the structural material. Input/output contacts are arrayed over the redistribution layer, including over the lower surfaces of at least some integrated circuit chips within the multichip layer, and are electrically connected through the redistribution metallization, conductive structures, and interconnect metallization to contact pads of the integrated circuit chips of the multichip layer.