(19)
(11) EP 1 599 429 A1

(12)

(43) Date of publication:
30.11.2005 Bulletin 2005/48

(21) Application number: 04713676.7

(22) Date of filing: 23.02.2004
(51) International Patent Classification (IPC)7C04B 35/117, H05K 1/03, H01B 3/12
(86) International application number:
PCT/JP2004/002079
(87) International publication number:
WO 2004/074207 (02.09.2004 Gazette 2004/36)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 24.02.2003 JP 2003045410
22.10.2003 JP 2003361733
17.09.2003 JP 2003323981

(71) Applicant: Showa Denko K.K.
Tokyo 105-8518 (JP)

(72) Inventors:
  • Osuzu, Hideyuki,Showa Denko K.K.
    Yokohama-shi,Kanagawa 221-0024 (JP)
  • Kamimura, Katsuhiko,Showa Denko K.K.
    Yokohama-shi,Kanagawa 221-0024 (JP)

(74) Representative: Strehl Schübel-Hopf & Partner 
Maximilianstrasse 54
80538 München
80538 München (DE)

   


(54) ALUMINA-BASED CERAMIC MATERIAL AND PRODUCTION METHOD THEREOF