Patent Number: 
Section: claims

1. An electromagnetic-wave suppressing device including an electromagnetic-wave suppressing material, the electromagnetic-wave suppressing material comprising:an ionic liquid; andnanometer-order particles mixed with the ionic liquid, wherein10 wt % or more of the nanometer-order particles is mixed with respect to 100 wt % of the ionic liquid. 2. The electromagnetic-wave suppressing device according to claim 1, whereina sealing member is sealed with the electromagnetic-wave suppressing material. 3. The electromagnetic-wave suppressing device according to claim 1, wherein the electromagnetic-wave suppressing material is in sheet form. 4. The electromagnetic-wave suppressing device according to claim 1, whereinthe electromagnetic-wave suppressing material is in bulk form. 5. The electromagnetic-wave suppressing device according to claim 1, whereinan insulating material is laminated on the electromagnetic-wave suppressing material. 6. The electromagnetic-wave suppressing device according to claim 1, wherein the ionic liquid is a mixture of an anionic ion X− and one of an imidazolium salt of 1-ethyl-3-methyl imidazolium, a pyridinium salt of 3-butyl pyridium and an aliphatic quaternary ammonium salt. 7. The electromagnetic-wave suppressing device according to claim 6, wherein the anionic ion X− is (CF3SO2)2N−,BF4−,PF6−. 8. The electromagnetic-wave suppressing device according to claim 6, wherein the nanometer-order particles is one of a dielectric material with a specific permittivity of 10 or more at 1 kHz at room temperature and a magnetic material with a relative magnetic permeability of 100 or more at 100 MHz at room temperature. 9. An electronic apparatus comprising:an integrated circuit device;a wiring line; andan electromagnetic-wave suppressing device located in the vicinity of at least one of the integrated circuit device and the wiring line, whereinthe electromagnetic-wave suppressing device including an ionic liquid and nanometer-order particles mixed with the ionic liquid, where 10 wt % or more of the nanometer-order particles is mixed with respect to 100 wt % of the ionic liquid. 10. The electronic apparatus according to claim 9, wherein the ionic liquid is a mixture of an anionic ion X− and one of an imidazolium salt of 1-ethyl-3-methyl imidazolium, a pyridinium salt of 3-butyl pyridium and an aliphatic quaternary ammonium salt. 11. The electronic apparatus according to claim 10, wherein the anionic ion X− is (CF3SO2)2N−,BF4−,PF6−. 12. The electronic apparatus according to claim 10, wherein the nanometer-order particles is one of a dielectric material with a specific permittivity of 10 or more at 1 kHz at room temperature and a magnetic material with a relative magnetic permeability of 100 or more at 100 MHz at room temperature.