US 6,582,541 B2Granted

Monolithic ceramic substrate, manufacturing and designing methods therefor, and electronic device

AssigneeMurata Manufacturing Co., Ltd.

InventorsMitsuyoshi Nishide, Norio Sakai, Akira Baba

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Abstract

In a green laminate body including a plurality of base green layers and a plurality of constraining green layers for forming a monolithic ceramic substrate by using a non-shrinking process, when the thicknesses of the base green layers differ from each other, a thicker base green layer shrinks largely during sintering, and hence, the resulting monolithic ceramic substrate may warp in some cases. In order to solve this problem, the constraining green layers, which are in contact with the main surfaces of the individual base green layers, have different thicknesses so that a relatively thicker constraining green layer is in contact with a relatively thicker base green layer, and a relatively thinner constraining green layer is in contact with a relatively thinner base green.

Claims14

Dependent claims

A method for manufacturing a monolithic ceramic substrate, comprising the steps of:

forming a green laminate body including a plurality of base green layers which contain low-temperature sinterable ceramic particles, a plurality of constraining green layers which contain inorganic particles that are not sintered at a sintering temperature of the low-temperature sinterable ceramic particles and which are disposed so as to be in contact with the main surfaces of predetermines layers of the plurality of base layers, and wiring conductors provided for the base green layers;
and
sintering the green laminate boy under conditions causing sintering of the low-temperature sinterable ceramic particles;
wherein at least two base green layers selected from the plurality of base green layers constituting the green laminate body have different intrinsic shrinkabilities during the sintering step, and at least two constraining green layers selected from the plurality of constraining green layers constituting the green laminate have different constraining forces applied to the base green layers for constraining the shrinkage thereof.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 10/124,409Filed 18 Apr 2002 · division
Priority: JP 2000-10779710 Apr 2000
Published: US 2002/0058131 A124 Oct 2002
Granted: 24 Jun 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification36 codes

H05K 3/4688
Manufacturing multilayer circuits: composite multilayer circuits, i.e. comprising insulating layers having different properties
B32B 17/00
Layered products essentially comprising sheet glass, or glass, slag, or like fibres
B32B 18/00
Layered products essentially comprising ceramics
C03C 8/02
Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions: frit compositions, i.e. in a powdered or comminuted form

Family

Application09/828,080Parent of this division · filed 6 Apr 2001
US 2002/0155264 A1Pre-grant publication · published 24 Oct 2002
US 6,468,640 B2Parent of this division
US 2002/0058131 A1Published application
US 6,582,541 B2This patent

From the US filing history. Foreign family members aren’t listed.