Superconducting ceramic circuits and manufacturing method for the same

Claim 2

A multilayered circuit comprising: a lower superconducting pattern made of a superconducting ceramic material formed on a substrate; an intervening insulating ceramic film for electrical isolation formed on said lower superconducting pattern; and an upper superconducting pattern made of a superconducting ceramic material electrically isolated from said lower superconducting pattern by said insulating ceramic film wherein the thermal expansion coefficient of the substrate is ±50% that of the superconducting ceramic materials of the lower and upper superconducting patterns.

Claim 3

The circuit of claim 1 wherein said lower and upper superconducting patterns are interconnected through an opening formed in said insulating ceramic film.

Claim 4

The circuit of claim 1 wherein said lower and/or upper superconducting pattern is a coil.

Claim 5

The circuit of claim 3 wherein said lower and upper patterns are coils which are respectively coupled to form a multilayered coil wherein the lower coil turns in a first turning direction from a first end thereof to a second end and the upper coil turns in a second turning direction from a first end thereof to a second end, and wherein said first and second turning directions are opposite one another.

Claim 6

The circuit of claim 1 wherein said lower pattern is formed on an insulating ceramic substrate.

Claim 7

The circuit of claim 1 wherein said patterns are spirals formed on a disk.

Claim 8

The circuit of claim 1 wherein said patterns are helices on a cylindrical surface.

Claim 9

The circuit of claim 1 wherein said insulating ceramic film is made of an oxide ceramic material conforming to the stoichiometric formula [(A' p A" 1-p ) 1-x (B' q B" 1-q ) X ] y (Cu r X 1-r ) Z O W , where A' is one or more elements of Group IIIa of the Priodic Table, e.g., the rare earth elements or lantanoides, B' is one or more alkaline earth metals, i.e. Ba, Sr and Ca, A", B" and X are selected from a group consisting of Mg, Be, Al, Fe, Co, Ni, Cr, Ti, Mn and Zr, and X=0-1; Y=2.0-4.0; Z=1.0-4.0; and W=4.0-10.0, and the numbers p, q and r are chosen so that the total proportion of A", B" and X is 1-20 vol %, and wherein said superconducting ceramic pattern is made of materials conforming to the stoichiometric formula, (A 1-X B X ) Y Cu Z O W , where A is one or more elements of Group IIIa of the Priodic Table, e.g., the rare earth elements or lantanoides, B is one or more alkaline earth metals, i.e. Ba, Sr and Ca, and X=0-1; Y=2.0-4.0; Z=1.0-4.0; and W=4.0-10.0.

Claim 10

A multi-layered coil where each layer comprises a copper-oxide superconducting ceramic and where each layer is electrically isolated from adjacent layers by a copper-oxide non-superconducting ceramic layer interposed between said adjacent layers.

Claim 11

A multi-layered coil where each layer comprises a copper-oxide superconducting ceramic and where each layer is electrically isolated from adjacent layers by a copper-oxide non-superconducting ceramic layer interposed between said adjacent layers.

Claim 12

The multilayered circuit of claim 1, wherein superconducting ceramic materials for the upper and lower superconducting patterns comprise materials represented by the formula (A 1-x B x ) y Cu z O w , wherein A is one or more elements of Group IIIa of the Periodic Table, B is one or more alkaline earth metals, x=0-1, y=2.0-4.0 z=1.0-4.0 and w=4.0-10.0.

Claim 13

The multilayered circuit of claim 10, wherein z=1.5-3.5, y=2.5-3.5 and w=6.0-8.0, and wherein B comprises at least one of Ba, Sr and Ca.

Claim 14

The multilayered circuit of claim 1, wherein superconducting ceramic materials for the upper and lower superconducting patterns comprises materials represented by the formula (A 1-x B x ) y Cu z O w , wherein A is one or more elements of Group Vb of the Periodic Table, B is one or more elements of Group IIa of the Periodic Table, x=0.3-1, y=2.0-4.0 z=1.0-4.0 and w=4.0-10.0.

Claim 15

The multilayered circuit of claim 12, wherein A comprises at least one of B, Sb and As, z=1.5-3.5 y=2.5-3.5, and w=6.0-8.0.

Claim 16

The multilayered circuit of claim 1, wherein superconducting materials for the upper and lower superconducting patterns comprise at least one of BiSrCaCu 2 O x , Bi 4 Sr 3 Ca 3 Cu 4 O x , Bi 4 Sr 4 Ca 2 Cu 4 Ox and Bi 2 Sr 3 Ca 2 Cu 2 O x .

Claim 17

The multilayered coil of claim 9, wherein the copper-oxide superconducting ceramic comprises materials represented by the formula (A 1-x B x ) y Cu z O w , wherein A is one or more elements of Group IIIa of the Periodic Table, B is one or more alkaline earth metals, x=0-1, y=2.0-4.0 z=1.0-4.0 and w=4.0-10.0.

Claim 18

The multilayered coil of claim 9, wherein the copper-oxide superconducting ceramic comprises materials represented by the formula (A 1-x B x ) y Cu z O w , wherein A is one or more elements of Group Vb of the Periodic Table, B is one or more elements of Group IIa, x=0.3-1, y=2.0-4.0, z=1.0-4.0 and w=4.0-10.0.