Patents Assigned to Iwaki Glass Company Ltd.
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Patent number: 5821182Abstract: A hermetic sealing composition comprising 100 parts by weight of a basic composition consisting of from 80 to 99.9 wt % of a crystalline low melting glass powder containing lead and boron and from 0.1 to 20 wt % of a low expansion ceramic filler, and from 0.001 to 1.0 part by weight, in total, of at least one of an .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and a Pb.sub.3 O.sub.4 powder, incorporated to the basic composition, the thermal expansion coefficient of the sealing composition after firing being from 80.times.10.sup.-7 to 105.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C.Type: GrantFiled: April 18, 1997Date of Patent: October 13, 1998Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.Inventors: Ryuichi Tanabe, Satoshi Rokudai, Yuichi Kuroki, Akira Nakamura
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Patent number: 5683948Abstract: A hermetic sealing composition comprising 100 parts by weight of a basic composition consisting of from 80 to 99.9 wt % of a crystalline low melting glass powder containing lead and boron and from 0.1 to 20 wt % of a low expansion ceramic filler, and from 0.001 to 1.0 part by weight, in total, of at least one of an .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and a Pb.sub.3 O.sub.4 powder, incorporated to the basic composition, the thermal expansion coefficient of the sealing composition after firing being from 80.times.10.sup.-7 to 105.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C.Type: GrantFiled: July 30, 1996Date of Patent: November 4, 1997Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.Inventors: Ryuichi Tanabe, Satoshi Rokudai, Yuichi Kuroki, Akira Nakamura
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Patent number: 5498657Abstract: A fluorine-containing polymer composition comprising a polymer having a functional group and a fluorine-containing aliphatic cyclic structure dissolved in a solvent mixture of an aprotic fluorine-containing solvent and a protic fluorine-containing solvent.Type: GrantFiled: August 26, 1994Date of Patent: March 12, 1996Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.Inventors: Norihide Sugiyama, Atsushi Watakabe, Shunsuke Yokotsuka, Atsuo Hiroi, Masaki Naritomi, Naoko Shirota, Ko Aosaki, Masaru Nakamura
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Patent number: 4704370Abstract: A sealing glass composition comprising from 75 to 50% by volume of low-melting glass powder containing PbO as the main component, from 20 to 45% by volume of ceramics powder having a thermal expansion coefficient of at most 30.times.10.sup.-7 .degree. C..sup.-1 in a range of from room temperature to 300.degree. C. and from 5 to 30% by volume of TiO.sub.2 -SnO.sub.2 solid solution powder.Type: GrantFiled: November 3, 1983Date of Patent: November 3, 1987Assignee: Iwaki Glass Company Ltd.Inventors: Hiroshi Seki, Toshiki Nishiyuki
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Patent number: 4405722Abstract: A sealing glass composition containing refractory filler of lower coefficient of thermal expansion for use in sealing alumina package for electronic components is disclosed. The composition consists essentially of low melting glass powder and cordierite powder in proportion of 2-30% by weight of the total composition, and optionally, .beta.-eucryptite, .beta.-spodumen, lead titanate or zircon in a proportion, respectively, not exceeding 15% by weight of the total composition. The low melting glass has a composition of 77.0-86.0 wt. % of PbO, 6.0-15.0 wt. % of B.sub.2 O.sub.3, 0.5-6.9 wt. % of ZnO, 0.1-3.0 wt. % of SiO.sub.2, 0-3.0% of Al.sub.2 O.sub.3 0-2.0% of alkali earth metal oxide, 0-1.5% of SnO.sub.2 and 0-1.0% of alkali metal oxide.Type: GrantFiled: January 2, 1980Date of Patent: September 20, 1983Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.Inventors: Yoshinori Kokubu, Jiro Chiba, Nobuyoshi Ichimura, Takashi Iwai, Toshiyasu Kawaguchi
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Patent number: RE37022Abstract: A fluorine-containing polymer composition comprising a polymer having a functional group and a fluorine-containing aliphatic cyclic structure dissolved in a solvent mixture of an aprotic fluorine-containing solvent and a protic fluorine-containing solvent.Type: GrantFiled: March 10, 1998Date of Patent: January 16, 2001Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.Inventors: Norihide Sugiyama, Atsushi Watakabe, Shunsuke Yokotsuka, Atsuo Hiroi, Masaki Naritomi, Naoko Shirota, Ko Aosaki, Masaru Nakamura