PROCESS FOR PRODUCING CERAMIC SHEET, CERAMIC SUBSTRATE UTILIZING THE SAME AND USE THEREOF

Title:

PROCESS FOR PRODUCING CERAMIC SHEET, CERAMIC SUBSTRATE UTILIZING THE SAME AND USE THEREOF

Document Type and Number:

WIPO Patent Application WO/2005/090032

Kind Code:

A1

Abstract:

It is intended to solve the problem of the conventional process for producing a ceramic sheet through extrusion molding such that it is a production process of prolonged lead time requiring raw material granulation and homogenization operations and when the homogenization of kneaded clay is unsatisfactory, a density irregularity of green sheet would occur with the result that the ceramic sintered compact after sintering operation would suffer deformation and warpage to thereby cause failures in circuit pattern printing and joining between metal circuit board and heat sink. There is provided a process for producing a ceramic sheet, comprising use of an extrusion molding machine combining a twin screw extruder of powerful kneading capability with a single screw extruder of molding stability, so that a quality equivalent to or superior to that of the prior art can be obtained and that high production efficiency can be attained. Further, there is provided a ceramic substrate utilizing the same.

Inventors:

TERAO AKIRA (JP)
FUKUDA MAKOTO (JP)
YOSHINO NOBUYUKI (JP)

Application Number:

PCT/JP2005/004815

Publication Date:

September 29, 2005

Filing Date:

March 17, 2005

Export Citation:

Click for automatic bibliography generation Help

Assignee:

DENKI KAGAKU KOGYO KK (JP)
TERAO AKIRA (JP)
FUKUDA MAKOTO (JP)
YOSHINO NOBUYUKI (JP)

International Classes:

B28B3/22; B29C48/07; H01L21/48; H01L23/12; H01L23/36; H05K7/20; B29C48/395; H01L23/15; H05K1/03; (IPC1-7): B28B3/22; H01L23/12; H01L23/15; H01L23/36; H05K1/03; H05K7/20

Foreign References:

JPH05220803A	1993-08-31
JP2002079509A	2002-03-19
JP2002144313A	2002-05-21

Other References: