Title:
CERAMIC COPPER CIRCUIT BOARD AND SEMICONDUCTOR DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/209175
Kind Code:
A1
Abstract:
A ceramic copper circuit board including a ceramic board, and a copper circuit provided upon the ceramic board, said ceramic copper circuit board characterized in that, in a cross section of the copper circuit parallel to a first direction heading from the ceramic board toward the copper circuit, an arbitrary line parallel to the first direction intersects a plurality of copper crystal grains, and the average of a plurality of distances in a second direction perpendicular to the first direction between said line and the respective ends of the copper crystal grains in the second direction is 300 μm or less.
Inventors:
NABA TAKAYUKI (JP)
KATO HIROMASA (JP)
YANO KEIICHI (JP)
KATO HIROMASA (JP)
YANO KEIICHI (JP)
Application Number:
PCT/JP2020/015211
Publication Date:
October 15, 2020
Filing Date:
April 02, 2020
Export Citation:
Assignee:
TOSHIBA KK (JP)
TOSHIBA MATERIALS CO LTD (JP)
TOSHIBA MATERIALS CO LTD (JP)
International Classes:
C22C5/08; B23K35/30; C22C9/00; H01L23/15; H05K1/09
Domestic Patent References:
| WO2017056360A1 | 2017-04-06 | |||
| WO2018180965A1 | 2018-10-04 |
Foreign References:
| JP2007177274A | 2007-07-12 | |||
| JP2005268821A | 2005-09-29 | |||
| JP2006128286A | 2006-05-18 | |||
| JP2011124585A | 2011-06-23 |
Other References:
See also references of EP 3954795A4
Attorney, Agent or Firm:
HYUGAJI, Masahiko et al. (JP)
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