H - Electricity – 01 – B
Patent
H - Electricity
01
B
H01B 12/12 (2006.01) H01L 39/14 (2006.01) H05K 9/00 (2006.01)
Patent
CA 2056871
ABSTRACT A small tube satisfying the following formula is fixed to the opening (for enabling the insertion of sensor, etc.) provided at the bottom or tubular portion of a superconducting tubular material for magnetic shielding comprising a bottomed tubular substrate and an oxide superconducting layer formed on the substrate: L/R ? L1/R1 wherein L is a distance from the top end of the tubular material to the small tube, i.e. the opening of the tubular material; R is an inside diameter of the oxide superconducting layer in the tubular material; L1 is a length of the small tube; and R1 is an inside diameter of the oxide superconducting layer in the small tube. Then, an oxide superconducting layer is formed on the small tube contiguously to the oxide supercon-ducting layer formed on the bottomed tubular substrate. The resulting superconducting tubular material for magnetic shielding can protect the penetration of a magnetic field into the tubular material through the opening.
Marks & Clerk
Ngk Insulators Ltd.
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