Abstract: A cryogenic multilayer interconnect structure has a substrate including a molybdenum layer, a first insulating layer on the substrate and a first superconducting layer on the first insulating layer. The molybdenum layer has a coefficient of thermal expansion (CTE) that is well matched with the CTE of cryogenic electronic chips that are to be attached to the cryogenic multilayer interconnect structure. The substrate may be a copper clad molybdenum substrate that provide the CTE advantages provided by the molybdenum layer while also providing an increased thermal conductivity to improve the dissipation of heat generated by cryogenic electronic chips coupled to the substrate.

Abstract: Methods and apparatus to improve routing density through asymmetric array of vias are described. In one embodiment, a plurality of vias may be asymmetrically distributed relative to the distribution of a plurality of pads. Other embodiments are also described.

Abstract: A microelectronic circuit structure containing interleaved copies of a first circuit pattern and a second circuit pattern, each circuit pattern containing a transmitter and a receiver, where transmitters and receivers of the two circuit patterns are positioned so that the two transmitters are adjacent or so that the two receivers are adjacent. Other structures and methods are also described and claimed.

Abstract: A microelectronic circuit structure containing interleaved copies of a first circuit pattern and a second circuit pattern, each circuit pattern containing a transmitter and a receiver, where transmitters and receivers of the two circuit patterns are positioned so that the two transmitters are adjacent or so that the two receivers are adjacent. Other structures and methods are also described and claimed.