Abstract: Embodiments of the present disclosure are directed toward interconnect routing configurations and associated techniques. In one embodiment, an apparatus includes a substrate, a first routing layer disposed on the substrate and having a first plurality of traces, and a second routing layer disposed directly adjacent to the first routing layer and having a second plurality of traces, wherein a first trace of the first plurality of traces has a width that is greater than a width of a second trace of the second plurality of traces. Other embodiments may be described and/or claimed.

Abstract: An apparatus including a die including a device side with contact points and lateral sidewalls defining a thickness of the die; a build-up carrier coupled to the die, the build-up carrier including a plurality of alternating layers of patterned conductive material and insulating material, wherein at least one of the layers of patterned conductive material is coupled to one of the contact points of the die; and an interference shield including a conductive material disposed on the die and a portion of the build-up carrier. The apparatus may be connected to a printed circuit board. A method including forming a build-up carrier adjacent a device side of a die including a plurality of alternating layers of patterned conductive material and insulating material; and forming a interference shield on a portion of the build-up carrier.

Abstract: X-line routing arrangements for dense multi-chip-package interconnects are described. In an example, an electronic signal routing structure includes a substrate. A plurality of layers of conductive traces is disposed above the substrate. A first pair of ground traces is disposed in a first of the plurality of layers of conductive traces. A signal trace is disposed in a second of the plurality of layers of conductive traces, below the first layer. A second pair of ground traces is disposed in a third of the plurality of layers of conductive traces, below the first layer. The first and second pairs of ground traces and the signal trace provide an X-pattern routing from a cross-sectional perspective.

Abstract: Embodiments of the present disclosure are directed towards techniques and configurations for ground via clustering for crosstalk mitigation in integrated circuit (IC) assemblies. In some embodiments, an IC package assembly may include a first package substrate configured to route input/output (I/O) signals and ground between a die and a second package substrate. The first package substrate may include a plurality of contacts disposed on one side of the first package substrate and at least two ground vias of a same layer of vias, and the at least two ground vias may form a cluster of ground vias electrically coupled with an individual contact. Other embodiments may be described and/or claimed.

Abstract: An apparatus including a die including a device side with contact points and lateral sidewalls defining a thickness of the die; a build-up carrier coupled to the die, the build-up carrier including a plurality of alternating layers of patterned conductive material and insulating material, wherein at least one of the layers of patterned conductive material is coupled to one of the contact points of the die; and an interference shield including a conductive material disposed on the die and a portion of the build-up carrier. The apparatus may be connected to a printed circuit board. A method including forming a build-up carrier adjacent a device side of a die including a plurality of alternating layers of patterned conductive material and insulating material; and forming a interference shield on a portion of the build-up carrier.

Abstract: Some embodiments described herein include apparatuses and methods of forming such apparatuses. One such embodiment may include a routing arrangement having pads to be coupled to a semiconductor die, with a first trace coupled to a first pad among the pads, and a second trace coupled to a second pad among the pads. The first and second traces may have different thicknesses. Other embodiments including additional apparatuses and methods are described.

Abstract: An apparatus including a die including a device side with contact points and lateral sidewalls defining a thickness of the die; a build-up carrier coupled to the die, the build-up carrier including a plurality of alternating layers of patterned conductive material and insulating material, wherein at least one of the layers of patterned conductive material is coupled to one of the contact points of the die; and an interference shield including a conductive material disposed on the die and a portion of the build-up carrier. The apparatus may be connected to a printed circuit board. A method including forming a build-up carrier adjacent a device side of a die including a plurality of alternating layers of patterned conductive material and insulating material; and forming a interference shield on a portion of the build-up carrier.

Abstract: A metal surface feature, such as a pad, terminating a vertical transition through a substrate, such as an IC package substrate, includes one or more stubs providing high edge surface area to couple with one or more complementary stubs on an adjacent metal surface feature to provide a desired amount of mutual capacitance that may at least partially cancel crosstalk for an overall channel crosstalk (e.g., FEXT) reduction. In embodiments, capacitive coupling of adjacent pads is provided for more than two pads to achieve crosstalk reduction of more than one victim-aggressor pair and/or to achieve crosstalk reduction of more than two aggressors. In embodiments, the pads have a large pitch (e.g., 1000 ?m) suitable for interfacing to an interposer or PCB socket, while the gap between the stubs is small (e.g., 15 ?m), as limited only by the minimum spacing allowed for metal features on the opposite side of the package employed for interfacing to the IC.

Abstract: A mechanism is described for facilitating dynamic cancellation of signal crosstalk in input/output differential channels according to one embodiment. A method of embodiments may include detecting crosstalk between a first differential signal channel pair (“differential pair”) and a second differential pair of a plurality of differential pairs at a computing system, and switching polarity relating to the first transmission links of the first differential pair to cancel out the crosstalk with the second differential pair.

Abstract: This disclosure relates generally to devices, systems, and methods for making a flexible microelectronic assembly. In an example, a polymer is molded over a microelectronic component, the polymer mold assuming a substantially rigid state following the molding. A routing layer is formed with respect to the microelectronic component and the polymer mold, the routing layer including traces electrically coupled to the microelectronic component. An input is applied to the polymer mold, the polymer mold transitioning from the substantially rigid state to a substantially flexible state upon application of the input.

Abstract: A microelectronic package of the present description may comprises a first microelectronic device having at least one row of connection structures electrically connected thereto and a second microelectronic device having at least one row of connection structures electrically connected thereto, wherein the connection structures within the at least one first microelectronic device row are aligned with corresponding connection structures within the at least one second microelectronic device row in an x-direction.

Abstract: X-line routing arrangements for dense multi-chip-package interconnects are described. In an example, an electronic signal routing structure includes a substrate. A plurality of layers of conductive traces is disposed above the substrate. A first pair of ground traces is disposed in a first of the plurality of layers of conductive traces. A signal trace is disposed in a second of the plurality of layers of conductive traces, below the first layer. A second pair of ground traces is disposed in a third of the plurality of layers of conductive traces, below the first layer. The first and second pairs of ground traces and the signal trace provide an X-pattern routing from a cross-sectional perspective.

Abstract: X-line routing arrangements for dense multi-chip-package interconnects are described. In an example, an electronic signal routing structure includes a substrate. A plurality of layers of conductive traces is disposed above the substrate. A first pair of ground traces is disposed in a first of the plurality of layers of conductive traces. A signal trace is disposed in a second of the plurality of layers of conductive traces, below the first layer. A second pair of ground traces is disposed in a third of the plurality of layers of conductive traces, below the first layer. The first and second pairs of ground traces and the signal trace provide an X-pattern routing from a cross-sectional perspective.

Abstract: A metal surface feature, such as a pad, terminating a vertical transition through a substrate, such as an IC package substrate, includes one or more stubs providing high edge surface area to couple with one or more complementary stubs on an adjacent metal surface feature to provide a desired amount of mutual capacitance that may at least partially cancel crosstalk for an overall channel crosstalk (e.g., FEXT) reduction. In embodiments, capacitive coupling of adjacent pads is provided for more than two pads to achieve crosstalk reduction of more than one victim-aggressor pair and/or to achieve crosstalk reduction of more than two aggressors. In embodiments, the pads have a large pitch (e.g., 1000 ?m) suitable for interfacing to an interposer or PCB socket, while the gap between the stubs is small (e.g., 15 ?m), as limited only by the minimum spacing allowed for metal features on the opposite side of the package employed for interfacing to the IC.

Abstract: Capacitively coupled vertical transitions may be configured with a desired amount of mutual capacitance to at least partially cancel crosstalk for an overall channel crosstalk (e.g., FEXT) reduction. In embodiments, capacitive coupling of adjacent vertical transitions is achieved with overlapping metal surfaces within the vertical transitions. In embodiments, one or more of the overlapping metal surfaces are vias, via pads, or metal stub features extending off a vertical transition. In embodiments, signal paths with overlapped vertical transitions are utilized to achieve crosstalk reduction of more than one victim-aggressor pair and/or to achieve crosstalk reduction of more than two aggressors. In embodiments, capacitively coupled vertical transitions are implemented in a package substrate, an interposer, or a printed circuit board.

Abstract: In accordance with one aspect of the present description, a transmission line such as a microstrip or stripline transmission line, has stub-shaped projections adapted to compensate simultaneously for both far-end crosstalk (FEXT) induced by inductive coupling between the transmission line and an adjacent transmission line, and also far-end crosstalk induced by inductive coupling between the vertical electrical interconnect at the far end of the transmission line and an adjacent vertical electrical interconnect electrically connected to the adjacent transmission line. In another aspect of the present description, a microstrip transmission line may have multiple stubby line sections having different resistances and impedances to more gradually transition from to the typically low impedance characteristics of vertical interconnects such as the PTH vias and socket connectors. Other aspects are described.

Abstract: A mechanism is described for facilitating dynamic cancellation of signal crosstalk in input/output differential channels according to one embodiment. A method of embodiments may include detecting crosstalk between a first differential signal channel pair (“differential pair”) and a second differential pair of a plurality of differential pairs at a computing system, and switching polarity relating to the first transmission links of the first differential pair to cancel out the crosstalk with the second differential pair.

Abstract: Some embodiments described herein include apparatuses and methods of forming such apparatuses. One such embodiment may include a routing arrangement having pads to be coupled to a semiconductor die, with a first trace coupled to a first pad among the pads, and a second trace coupled to a second pad among the pads. The first and second traces may have different thicknesses. Other embodiments including additional apparatuses and methods are described.

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: X-line routing arrangements for dense multi-chip-package interconnects are described. In an example, an electronic signal routing structure includes a substrate. A plurality of layers of conductive traces is disposed above the substrate. A first pair of ground traces is disposed in a first of the plurality of layers of conductive traces. A signal trace is disposed in a second of the plurality of layers of conductive traces, below the first layer. A second pair of ground traces is disposed in a third of the plurality of layers of conductive traces, below the first layer. The first and second pairs of ground traces and the signal trace provide an X-pattern routing from a cross-sectional perspective.