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Browse Prior Art Database

Power Distribution for Large Scale Integrated Devices

IP.com Disclosure Number: IPCOM000080461D
Original Publication Date: 1973-Dec-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Braen, RC: AUTHOR

Abstract

On circular integrated circuit devices concentric rings a, b of conductive material are laid over a suitable insulator on top of the personalization layers. The concentric rings form power buses for the distribution of required voltage levels. Interconnection from the active elements, not shown, to the power buses are made via axially oriented posts 10. The concentric rings are selectively connected to wedge-shaped power pads A, B and suitably insulated from one another.

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Power Distribution for Large Scale Integrated Devices

On circular integrated circuit devices concentric rings a, b of conductive material are laid over a suitable insulator on top of the personalization layers. The concentric rings form power buses for the distribution of required voltage levels. Interconnection from the active elements, not shown, to the power buses are made via axially oriented posts 10. The concentric rings are selectively connected to wedge-shaped power pads A, B and suitably insulated from one another.

Figs. 1-3 illustrate typical steps in building up such a structure. In Fig. 1, a personalized layer 12 of a large-scale integrated device, overcoated with an insulating layer 14 and with the connection posts 10 in place, is subjected to a deposition process by which rings a, b are laid down over the exposed ends of
10. Then, in Fig. 2, wedge-shaped sectors 14 of rings a are insulated by depositions 20. Similarly, in sectors 16, rings b are insulated by depositions 18. In Fig. 3, conductor pads A are deposited over rings a in sectors 16, and conductor pads B are deposited over rings b in sectors 14. Finally, power leads 22, 24 are attached to the pads.

The number of voltage levels required and assignment to specific buses is a function of device requirements and active element location. Instead of two sets of rings a, b and a sequence of opposite polarity pads A, B, there could be a sequence of three or more sets of rings and narrower pads, as...