Stabilized carbon cluster conducting or superconducting material, process for producing the same, device using carbon cluster, and process for producing the device
AssigneeSumitomo Electric Industries, Ltd.
InventorsNobuyuki Okuda, Takashi Uemura, Yoshinobu Ueba, Koji Tada, Kengo Ohkura, Hirokazu Kugai
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Abstract
A stabilized carbon cluster conducting material comprising (i) a core comprising a conducting or superconducting carbon cluster and (ii) a sheath covering the core; a device comprising a substrate having thereon a film of a conducting or superconducting carbon cluster covered with a protective film capable of substantially preventing permeation of oxygen and water in the atmosphere; and processes for producing the stabilized carbon cluster conducting material and the device.
Claims3
A device comprising a substrate having thereon, (1) a film of a conducting or superconducting carbon cluster comprising (a) C.sub.60 or (b) a C.sub.60 /C.sub.70 mixture, each of (a) and (b) being doped with at least one dopant selected from the group consisting of Group I elements, Group II elements, Group III elements, and Group IV elements, covered with (2) a protective film capable of substantially preventing permeation of oxygen and water from the atmosphere,
- wherein said protective film (2) comprises an insulator having a thermal expansion coefficient ranging from 1.times.10.sup.-6 /.degree.C. to 5.times.10.sup.-6 /.degree.C.,
- wherein said device further comprises (3) a non-doped carbon cluster film between said film (1) and said protective film (2),
- wherein said insulator is selected from the group consisting of silicon, silicon dioxide, silicon nitride, diamond, amorphous carbon, and boron nitride, and
- wherein said protective film (2) has a thickness of from 0.1 .mu.m to 10 .mu.m.
Dependencies are inferred from the claim text.