Browse Prior Art Database

Superconducting Ribbon Transmission Line

IP.com Disclosure Number: IPCOM000081563D
Original Publication Date: 1974-Jun-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Hamel, HC: AUTHOR

Abstract

A superconducting ribbon transmission line 10 is provided for making ultrawide bandwidth connections for Josephson chips.

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Superconducting Ribbon Transmission Line

A superconducting ribbon transmission line 10 is provided for making ultrawide bandwidth connections for Josephson chips.

A thin conductor 12 (nonferrous) such as aluminum in the form of a spider frame or the like is utilized. The thin conductor 12 is electroplated with a metal 14 such as niobium which is a superconductor having an extremely tough oxide. The plating may be done in the case of niobium by using NbF5 which melts at 73 degrees C. The frame after plating is wet anodized. This forms a very tough and very well controlled insulating coating 16 such as Nb(2)O5.

A superconductor strip 18, such as lead or a lead-tin alloy, is deposited on the spider frame and legs and personalized. The connection to the chip is made by either low-temperature solder, ultrasonic bonding or other techniques that do not excessively heat the Josephson chips. The chips should not be heated to more than 70 degrees C. The chip connection is shown in the figure.

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