31.
    发明专利
    未知

    公开(公告)号:DE69600105T2

    公开(公告)日:1998-04-09

    申请号:DE69600105

    申请日:1996-05-07

    Abstract: The invention aims to offer a method to manufacture a high-strength, high-reliability and low cost silicon nitride based sintered body which is not affected by the amount of metal impurities contained in the silicon nitride powder, without using high-purity silicon nitride powder, and can be sintered for a short sintering time. The invention uses silicon nitride and sintering aids, and the powder mixture containing 500 - 5000 ppm metal impurities is sintered at temperatures ranging from 1300 - 1900 DEG CÄdegrees CÜ, and under the conditions wherein the product of sintering temperature and sintering time ranges from 1 x 10 to 10x 10 DEG C Ädegrees CÜ.seconds.

    32.
    发明专利
    未知

    公开(公告)号:DE69600105D1

    公开(公告)日:1998-01-02

    申请号:DE69600105

    申请日:1996-05-07

    Abstract: The invention aims to offer a method to manufacture a high-strength, high-reliability and low cost silicon nitride based sintered body which is not affected by the amount of metal impurities contained in the silicon nitride powder, without using high-purity silicon nitride powder, and can be sintered for a short sintering time. The invention uses silicon nitride and sintering aids, and the powder mixture containing 500 - 5000 ppm metal impurities is sintered at temperatures ranging from 1300 - 1900 DEG CÄdegrees CÜ, and under the conditions wherein the product of sintering temperature and sintering time ranges from 1 x 10 to 10x 10 DEG C Ädegrees CÜ.seconds.

    40.
    发明专利
    未知

    公开(公告)号:DE60316469D1

    公开(公告)日:2007-10-31

    申请号:DE60316469

    申请日:2003-12-04

    Abstract: Affords efficiently and at low cost practical, tiny light-emitting devices having an optically diffractive film on their light-output face. A light-emitting device (LD) includes a diffractive film (DF) formed on its light-output face; the diffractive film includes a transparent DLC (diamond-like carbon) layer; and the DLC layer includes a modulated-refractive-index diffraction grating containing local regions of relatively high refractive index and local regions of relatively low refractive index.

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