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AssigneesIsuzu Glass Co., Ltd., National Institute of Advanced Industrial Science and Technology
InventorsTatsuya Suetsugu, Kohei Kadono, Norimasa Kominami, Takeshi Ohtani, Hiroaki Yokoi, Minoru Takada, Takashi Tarumi, Toshihiko Einishi, Tetsuo Yazawa
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The present invention provides a method for forming an optical waveguide characterized by applying a paste containing a copper compound to a glass substrate containing an alkali metal as a glass component over the whole surface thereof or in a patterned form, and performing heat treatment at a temperature lower than the softening temperature of the glass substrate. The method of the invention can produce an optical waveguide without the need for a high vacuum as in the thin film deposition method and without the use of a molten salt, and is capable of dispersing Cu+ ions selectively in a glass substrate with excellent controllability.
A method for forming an optical waveguide, comprising applying a paste containing a copper compound, an organic resin and an organic solvent to a glass substrate containing an alkali metal as a component of the glass over the whole surface thereof or in a patterned form, and performing heat treatment at a temperature lower than the softening temperature of the glass substrate, whereby copper ions contained in the paste are diffused into the glass substrate as Cu+ ions and the diffused copper ions exist as Cu+ ions in the glass substrate.
A method for forming an optical waveguide comprising applying a paste containing a copper compound, an organic resin and an organic solvent to a glass substrate containing an alkali metal as a component of the glass over the whole surface thereof or in a patterned form, and performing heat treatment at a temperature lower than the softening temperature of the glass substrate, wherein said glass substrate comprises at least about 10% by weight of alkali metal, calculated on an oxide basis.
A method for forming an optical waveguide comprising applying a paste containing a copper compound, an organic resin and an organic solvent to a glass substrate containing an alkali metal as a component of the glass over the whole surface thereof or in a patterned form, and performing heat treatment at a temperature lower than the softening temperature of the glass substrate, wherein said glass substrate is a silicate glass containing about 70% to about 74% by weight of SiO2, about 13% to about 16 % by weight of at least one component selected from the group consisting of Li2O, Na2O and K2O, about 10% to about 13% by weight of at least one component selected from the group consisting of CaO, MgO and BaO, and about 1.5% to about 2.5% by weight of Al2O3, calculated on an oxide basis.
A method for forming an optical waveguide comprising applying a paste containing a copper compound, an organic resin and an organic solvent to a glass substrate containing an alkali metal as a component of the glass over the whole surface thereof or in a patterned form, and performing heat treatment at a temperature lower than the softening temperature of the glass substrate, wherein said glass substrate is a phosphate glass containing about 20% to about 50% by weight of P2O5, about 3% to about 35% by weight of SiO2, about 10% to about 35% by weight of Al2O3, and about 5% to about 10% by weight of at least one component selected from the group consisting of Li2O, Na2O and K2O, calculated on an oxide basis.
A method for forming an optical waveguide comprising applying a paste containing a copper compound, an organic resin and an organic solvent to a glass substrate containing an alkali metal as a component of the glass over the whole surface thereof or in a patterned form, and performing heat treatment at a temperature lower than the softening temperature of the glass substrate, wherein said paste comprises at least one selected from the group consisting of Na2SO4, K2SO4, NaNO3, KNO3, NaCl, NaBr, KCl and KBr.
Dependencies are inferred from the claim text.