Abstract: Certain embodiments relate to routing structures and their formation. In one embodiment a routing structure includes a first region including a first layer comprising alternating signal traces and ground traces separated by a dielectric. The first region also includes a second layer including alternating signal traces and ground traces separated by a dielectric, wherein the second layer signal positioned over the first layer ground traces, and the second layer ground traces positioned over the first layer signal traces. The first region may also include additional layers of alternating signal and ground traces. The first region may also be formed with the ground traces having a width that is larger than that of the signal traces. The routing structure may also include a second region including pads to which the traces are coupled. Other embodiments are described and claimed.

Abstract: Transmission lines with a first dielectric material separating signal traces and a second dielectric material separating the signal traces from a ground plane. In embodiments, mutual capacitance is tuned relative to self-capacitance to reverse polarity of far end crosstalk between a victim and aggressor channel relative to that induced by other interconnect portions along the length of the channels, such as inductively coupled portions. In embodiments, a transmission line for a single-ended channel includes a material of a higher dielectric constant within the same routing plane as a microstrip or stripline conductor, and a material of a lower dielectric constant between the conductor and the ground plane(s). In embodiments, a transmission line for a differential pair includes a material of a lower dielectric constant within the same routing plane as a microstrip or stripline conductors, and a material of a higher dielectric constant between the conductors and the ground plane(s).

Abstract: A passive equalizer circuit is embedded within a substrate of a package containing an integrated circuit. It is believed that substantial reduction in uneven frequency dependent loss may be achieved for interconnects interconnecting the integrated circuit with other integrated circuits on a printed circuit board. Other aspects are described and claimed.

Abstract: An assembly of substrate packages interconnected with flex cables. The assembly allows input/output (I/O) signals to be speedily transmitted between substrate packages via flex cable and without being routed through the motherboard. Embodiments relate to a substrate package providing detachable inter-package flex cable connection. The flex cable comprises a transmission region that includes a plurality of signal traces and a ground plane. A plurality of solder mask strips are disposed on the plurality of signals traces to provide anchoring for the signal traces. The solder mask strips intersect the signals traces. The exposed signal traces and the ground plane are coated with organic solderability preservative material. Hermetically-sealed guiding through holes are provided on the substrate package as a mechanical alignment feature to guide connection between flex cables and high speed I/O contact pads on the substrate package.

Abstract: A multimode system with at least two end points may include a multimode signaling path that, in some embodiments, is a multimode cable or a multimode board and is pluggably connectable to packages at each end point. Each end point may include a processor die package coupled to a socket. The socket may also receive a connector that couples the cable to the package. Power supply signals and input/output signals may be decoupled at each end point.

Abstract: In integrated circuit packages, core vias are created to provide electrical connections between circuitry on one face of the core substrate material with circuitry on an opposing face of the core substrate material. Provided are methods for forming a via in a packaging substrate and packaging substrates having core vias formed in the core substrate material. Methods for forma a core via in a packaging substrate in which a first hole is created through the core substrate and filled with a low permittivity filler material. A second co-axially aligned hole is then created in the low permittivity filler material wherein the second hole is smaller in diameter than the first hole. The second hole is then filled with conducting material to provide a conducting via through the core substrate material.

Abstract: A high-speed I/O trace is part of an I/O package architecture for an integrated circuit package substrate. The integrated circuit package substrate includes an integrated heat spreader footprint on a die-side and the I/O trace to couple with an IC device to be disposed inside the IHS footprint. The I/O trace includes a pin-out terminal outside the IHS footprint to couple to an IC device to be disposed outside the IHS footprint. The high-speed I/O trace can sustain a data flow rate from a processor in a range from 5 gigabits per second (Gb/s) to 40 Gb/s.

Abstract: An assembly of substrate packages interconnected with flex cables. The assembly allows input/output (I/O) signals to be speedily transmitted between substrate packages via flex cable and without being routed through the motherboard. Embodiments relate to a substrate package providing detachable inter-package flex cable connection. The flex cable comprises a transmission region that includes a plurality of signal traces and a ground plane. A plurality of solder mask strips are disposed on the plurality of signals traces to provide anchoring for the signal traces. The solder mask strips intersect the signals traces. The exposed signal traces and the ground plane are coated with organic solderability preservative material. Hermetically-sealed guiding through holes are provided on the substrate package as a mechanical alignment feature to guide connection between flex cables and high speed I/O contact pads on the substrate package.

Abstract: A multimode system with at least two end points may include a multimode signaling path that, in some embodiments, is a multimode cable or a multimode board and is pluggably connectable to packages at each end point. Each end point may include a processor die package coupled to a socket. The socket may also receive a connector that couples the cable to the package. Power supply signals and input/output signals may be decoupled at each end point.

Abstract: A shielded socket and method of fabrication is described. In an embodiment, a socket is formed of a conductive polymer socket housing, and at least one conductive contact is in electrical contact with the conductive polymer socket housing. In an embodiment, a socket is formed of an insulative socket housing, and at least one conductive contact is in electrical contact with a conductive grid embedded within the insulative housing.

Abstract: A multimode system with at least two end points may include a multimode signaling path that, in some embodiments, is a multimode cable or a multimode board and is pluggably connectable to packages at each end point. Each end point may include a processor die package coupled to a socket. The socket may also receive a connector that couples the cable to the package. Power supply signals and input/output signals may be decoupled at each end point.

Abstract: A multimode system with at least two end points may include a multimode signaling path that, in some embodiments, is a multimode cable or a multimode board and is pluggably connectable to packages at each end point. Each end point may include a processor die package coupled to a socket. The socket may also receive a connector that couples the cable to the package. Power supply signals and input/output signals may be decoupled at each end point.

Abstract: In integrated circuit packages, core vias are created to provide electrical connections between circuitry on one face of the core substrate material with circuitry on an opposing face of the core substrate material. Provided are methods for forming a via in a packaging substrate and packaging substrates having core vias formed in the core substrate material. Methods for forma a core via in a packaging substrate in which a first hole is created through the core substrate and filled with a low permittivity filler material. A second co-axially aligned hole is then created in the low permittivity filler material wherein the second hole is smaller in diameter than the first hole. The second hole is then filled with conducting material to provide a conducting via through the core substrate material.

Abstract: A multimode system with at least two end points may include a multimode signaling path that, in some embodiments, is a multimode cable or a multimode board and is pluggably connectable to packages at each end point. Each end point may include a processor die package coupled to a socket. The socket may also receive a connector that couples the cable to the package. Power supply signals and input/output signals may be decoupled at each end point.

Abstract: A high-speed I/O trace is part of an I/O package architecture for an integrated circuit package substrate. The integrated circuit package substrate includes an integrated heat spreader footprint on a die-side and the I/O trace to couple with an IC device to be disposed inside the IHS footprint. The I/O trace includes a pin-out terminal outside the IHS footprint to couple to an IC device to be disposed outside the IHS footprint. The high-speed I/O trace can sustain a data flow rate from a processor in a range from 5 gigabits per second (Gb/s) to 40 Gb/s.

Abstract: A high-speed I/O trace is part of an I/O package architecture for an integrated circuit package substrate. The integrated circuit package substrate includes an integrated heat spreader footprint on a die-side and the I/O trace to couple with an IC device to be disposed inside the IHS footprint. The I/O trace includes a pin-out terminal outside the IHS footprint to couple to an IC device to be disposed outside the IHS footprint. The high-speed I/O trace can sustain a data flow rate from a processor in a range from 5 gigabits per second (Gb/s) to 40 Gb/s.

Abstract: An embodiment of the present invention is a technique to fabricate a package substrate. The package substrate includes top substrate layers, an array capacitor, and bottom substrate layers. The top substrate layers embed micro-vias. The micro-vias have a micro-via area and provide electrical connections between the top substrate layers. The array capacitor structure is placed in contact with the micro-via area. The array capacitor structure is electrically connected to the micro-vias. The bottom substrate layers are formed on the array capacitor structure.

Abstract: A high-speed I/O trace is part of an I/O package architecture for an integrated circuit package substrate. The integrated circuit package substrate includes an integrated heat spreader footprint on a die-side and the I/O trace to couple with an IC device to be disposed inside the IHS footprint. The I/O trace includes a pin-out terminal outside the IHS footprint to couple to an IC device to be disposed outside the IHS footprint. The high-speed I/O trace can sustain a data flow rate from a processor in a range from 5 gigabits per second (Gb/s) to 40 Gb/s.

Abstract: A multimode system with at least two end points may include a multimode signaling path that, in some embodiments, is a multimode cable or a multimode board and is pluggably connectable to packages at each end point. Each end point may include a processor die package coupled to a socket. The socket may also receive a connector that couples the cable to the package. Power supply signals and input/output signals may be decoupled at each end point.

Abstract: A printed circuit assembly is provided. The printed circuit assembly includes a plurality of signal layers and a plurality of test structures disposed within the plurality of signal layers, wherein each of the plurality of test structures comprises one of a microstrip and a stripline and wherein each of the plurality of test structures is to measure a characteristic impedance of each of the plurality of signal layers.