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    11.
    发明专利
    未知

    公开(公告)号：DE69006609T2

    公开(公告)日：1994-06-30

    申请号：DE69006609

    申请日：1990-03-13

    Applicant: NGK INSULATORS LTD

    Inventor： KAJIHARA TAKEHIRO ,  OHASHI TOSHIO ,  MAEKAWA KOICHIRO

    IPC: H01L21/50 ,  H01L23/10

    Abstract: A ceramic lid (1) for sealing a semiconductor element and has a sealing surface for forming a seal with a ceramic package (6) housing a semiconductor (7) within a recess. A glass sealant is heated and hermetically seals said semiconductor element. The ceramic lid (1) is made of alumina of high purity and a glass sealing aid is applied to the sealing surface and is pretreated at a higher temperature than the heating temperature for sealing said semiconductor element, before the hermetic sealing of the semiconductor element in the ceramic package. This improves the strength of the seal and allows a smaller seal area.

    13.
    发明专利
    未知

    公开(公告)号：AU4665379A

    公开(公告)日：1979-12-06

    申请号：AU4665379

    申请日：1979-05-03

    Applicant: NGK INSULATORS LTD

    Inventor： ODA ISAO ,  MAEKAWA KOICHIRO

    IPC: H01J9/24 ,  C04B35/115 ,  H01J61/30 ,  C04B35/10

    Abstract: Polycrystalline translucent alumina having an average grain size of alumina crystal grain being not smaller than 20 mu and an average surface roughness of the fired body being not larger than 1/10 of the maximum grain size of alumina crystal grain and capable of being used for an envelope of a high pressure vapor discharge lamp, which is produced by shaping alumina composition powders consisting mainly of alumina into a given shape, primarily firing the shaped body under vacuum or in an atmosphere of hydrogen gas or dissociated ammonia gas at a temperature within 1,500 DEG C. and then secondarily firing the primarily fired body at a temperature of 1,650 DEG -1,900 DEG C., at least the temperature from 1,400 DEG C. to 1,700 DEG C. being raised at a rate of not lower than 200 DEG C./hr.

    16.
    发明专利
    未知

    公开(公告)号：DE69306635D1

    公开(公告)日：1997-01-30

    申请号：DE69306635

    申请日：1993-03-29

    Applicant: NGK INSULATORS LTD ,  NIPPON TELEGRAPH & TELEPHONE

    Inventor： MAEKAWA KOICHIRO ,  OTA TAKASHI ,  FUKUYAMA MASASHI

    IPC: G02B6/36 ,  G02B6/38 ,  G02B6/40

    Abstract: To obtain an optical fiber connector for splicing a plurality of optical fibers integrally, V-groove substrates (1-1 SIMILAR 1-5) each comprising V-grooves (2) for receiving the optical fibers and positioning standard surfaces (5-1 SIMILAR 5-5) arranged in parallel with the V-groove direction are stacked on each other on the basis of the positioning standard surfaces (5-1 SIMILAR 5-5). The optical fibers are located accurately and compactly.

    POLYCRYSTALLINE TRANSLUCENT ALUMINA
    20.
    发明专利
    POLYCRYSTALLINE TRANSLUCENT ALUMINA 未知

    公开(公告)号：AU531238B2

    公开(公告)日：1983-08-18

    申请号：AU4665379

    申请日：1979-05-03

    Applicant: NGK INSULATORS LTD

    Inventor： ODA ISAO ,  MAEKAWA KOICHIRO

    IPC: H01J9/24 ,  C04B35/115 ,  H01J61/30 ,  C04B35/10

    Abstract: Polycrystalline translucent alumina having an average grain size of alumina crystal grain being not smaller than 20 mu and an average surface roughness of the fired body being not larger than 1/10 of the maximum grain size of alumina crystal grain and capable of being used for an envelope of a high pressure vapor discharge lamp, which is produced by shaping alumina composition powders consisting mainly of alumina into a given shape, primarily firing the shaped body under vacuum or in an atmosphere of hydrogen gas or dissociated ammonia gas at a temperature within 1,500 DEG C. and then secondarily firing the primarily fired body at a temperature of 1,650 DEG -1,900 DEG C., at least the temperature from 1,400 DEG C. to 1,700 DEG C. being raised at a rate of not lower than 200 DEG C./hr.

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