公开(公告)号：US20160358840A1

公开(公告)日：2016-12-08

申请号：US15119052

申请日：2015-02-20

Applicant: Denka Company Limited

Inventor： Ryota AONO ,  Kosuke WADA ,  Masao TSUICHIHARA ,  Takeshi MIYAKAWA

IPC: H01L23/373 ,  H01L23/498 ,  C04B37/02

Abstract: [Problem] To obtain a ceramic circuit substrate having high bonding strength, excellent heat cycle resistance, enhanced reliability of operation as an electronic device, and excellent heat dissipation properties.[Solution] A ceramic circuit substrate in which metal plates and both main surfaces of a ceramic substrate are bonded via silver-copper brazing material layers, the ceramic Cit quit substrate characterized in that the silver-copper brazing material layers are formed from a silver-copper brazing material including 0.3-7.5 parts by mass of carbon fibers and 1.0-9.0 parts by mass of at least one active metal selected from titanium, zirconium, hafnium, niobium, tantalum, vanadium, and tin with respect to 75-98 parts by mass of silver powder and 2-25 parts by mass of copper powder totaling 100 part by mass, with the carbon fibers having an average length of 15-400 μm, an average diameter of 5-25 μm and an average aspect ratio of 3-28.

Abstract translation: [解决方案]陶瓷电镀基板，其中金属板和陶瓷基板的两个主表面通过银 - 铜钎料层接合，陶瓷Cit离子基板的特征在于，银 - 铜钎焊材料层由银 - 含有0.3〜7.5质量份的碳纤维的铜钎焊材料和选自钛，锆，铪，铌，钽，钒和锡中的至少一种活性金属相对于75-98份的1.0-9.0质量份 银粉的质量和总计100质量份的2〜25质量份的铜粉，碳纤维的平均长度为15〜400μm，平均直径为5〜25μm，平均长径比为3〜 28。

公开(公告)号：US20220402759A1

公开(公告)日：2022-12-22

申请号：US17777521

申请日：2020-11-12

Applicant: DENKA COMPANY LIMITED

Inventor： Go TAKEDA ,  Masao TSUICHIHARA ,  Takaaki TANAKA

IPC: C01B21/064

Abstract: One aspect of the present disclosure provides a hexagonal boron nitride powder having a purity of 98 mass % or more and a specific surface area of less than 2.0 m2/g.

公开(公告)号：US20210163288A1

公开(公告)日：2021-06-03

申请号：US17265841

申请日：2019-08-06

Applicant: DENKA COMPANY LIMITED

Inventor： Go TAKEDA ,  Masao TSUICHIHARA ,  Yoshitaka TANIGUCHI

IPC: C01B21/064

Abstract: A hexagonal boron powder having a purity of 98% by mass or more and a specific surface area of less than 2.0 m2/g.