A microelectronic unit includes a semiconductor element consisting essentially of semiconductor material and having a front surface, a rear surface, a plurality of active semiconductor devices adjacent the front surface, a plurality of conductive pads exposed at the front surface, and an opening ext
A microelectronic unit includes a semiconductor element consisting essentially of semiconductor material and having a front surface, a rear surface, a plurality of active semiconductor devices adjacent the front surface, a plurality of conductive pads exposed at the front surface, and an opening extending through the semiconductor element. At least one of the conductive pads can at least partially overlie the opening and can be electrically connected with at least one of the active semiconductor devices. The microelectronic unit can also include a first conductive element exposed at the rear surface for connection with an external component, the first conductive element extending through the opening and electrically connected with the at least one conductive pad, and a second conductive element extending through the opening and insulated from the first conductive element. The at least one conductive pad can overlie a peripheral edge of the second conductive element.
대표청구항▼
1. A microelectronic unit, comprising: a semiconductor element consisting essentially of semiconductor material and having a front surface, a rear surface, a plurality of active semiconductor devices adjacent the front surface, a plurality of conductive pads exposed at the front surface, and an open
1. A microelectronic unit, comprising: a semiconductor element consisting essentially of semiconductor material and having a front surface, a rear surface, a plurality of active semiconductor devices adjacent the front surface, a plurality of conductive pads exposed at the front surface, and an opening extending through the semiconductor element, wherein a first one of the conductive pads at least partially overlies the opening;a first conductive element exposed at the rear surface for connection with an external component, the first conductive element extending through the opening and electrically connected with the first conductive pad; anda second conductive element extending through the opening and directly contacting a surface of the semiconductor material within the opening, the second conductive element being insulated from the first conductive element, the second conductive element exposed at the rear surface for connection with the external component, the second conductive element extending through the opening and electrically connected with a second one of the conductive pads. 2. The microelectronic unit as claimed in claim 1, wherein the opening in the semiconductor element is at least partly aligned with the first and second conductive pads, the second conductive element extends along an interior surface of the opening, and the first conductive element extends along a surface of a dielectric material disposed along a surface of the second conductive element within the opening. 3. The microelectronic unit as claimed in claim 1, wherein the second conductive element is connectable to a reference potential. 4. The microelectronic unit as claimed in claim 3, wherein the first and second conductive elements are arranged to permit a desired impedance to be achieved for carrying a signal by the first conductive element. 5. A system comprising a microelectronic unit according to claim 1 and one or more other electronic components electrically connected with the structure. 6. The system as claimed in claim 5, wherein: the first conductive element is a signal conductor connection; andthe second conductive element is a reference conductor connection. 7. The system as claimed in claim 6, wherein the reference conductor connection is a reference ground conductor connection. 8. The system as claimed in claim 6, wherein the reference conductor connection is a reference power conductor connection. 9. The microelectronic unit as claimed in claim 1, wherein the opening in the semiconductor element extends partially through the semiconductor element to meet a first hole and a second hole in the semiconductor element between the front surface and the rear surface for the opening to extend completely through the semiconductor element. 10. The microelectronic unit as claimed in claim 1, wherein: the first conductive element comprises a first conductive contact, a conductive interconnect, and a first conductive via; andthe second conductive element comprises a second conductive contact, a conductive layer, and a second conductive via. 11. The microelectronic unit as claimed in claim 10, wherein: the conductive interconnect is electrically insulated from the semiconductor material; andthe conductive layer is in direct contact with the semiconductor material. 12. The microelectronic unit as claimed in claim 11, wherein the semiconductor element is a semiconductor substrate. 13. The microelectronic unit as claimed in claim 10, wherein the first and second conductive pads are respectively coupled to the first and second contacts. 14. The microelectronic unit as claimed in claim 10, wherein the conductive layer of the second conductive element is insulated from the conductive interconnect of the first conductive element by a dielectric layer within the opening and between the conductive layer and the conductive interconnect. 15. The microelectronic unit as claimed in claim 14, wherein: the conductive layer of the second conductive element is conformal to the surface of the semiconductor material within the opening;the dielectric layer is conformal to a surface of the conductive layer; andthe conductive interconnect of the first conductive element is conformal to a surface of the dielectric layer. 16. The microelectronic unit as claimed in claim 15, wherein: the conductive layer is a reference conductor of a transmission line; andthe conductive interconnect is a signal conductor of the transmission line. 17. The microelectronic unit as claimed in claim 16, wherein the conductive layer is configured to electrically shield the conductive interconnect. 18. The microelectronic unit as claimed in claim 16, wherein the conductive layer is configured to electrically shield the first conductive via.
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