Browse Prior Art Database

Multilayer Ceramic Sandwiches

IP.com Disclosure Number: IPCOM000079262D
Original Publication Date: 1973-Jun-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

McIntosh, CM: AUTHOR

Abstract

Many high-temperature multilayer ceramic (MLC) processes do not lend themselves readily to an extension of the technology. The reducing atmospheres necessary for the high-temperature processes prevent the use of a green sheet material having high- K(Hi-K) coefficients. On the other hand, low-temperature MLC processes are more flexible and versatile in that a wide range of materials can be employed for forming the plurality of layers, and significantly these additional materials can be incorporated in situ so as to function as electrical components, as opposed to functioning only as insulators.

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Multilayer Ceramic Sandwiches

Many high-temperature multilayer ceramic (MLC) processes do not lend themselves readily to an extension of the technology. The reducing atmospheres necessary for the high-temperature processes prevent the use of a green sheet material having high- K(Hi-K) coefficients. On the other hand, low-temperature MLC processes are more flexible and versatile in that a wide range of materials can be employed for forming the plurality of layers, and significantly these additional materials can be incorporated in situ so as to function as electrical components, as opposed to functioning only as insulators.

Fig. 1 illustrates one particular combination of a multi-layer ceramic package, wherein layer 10 comprises a low-K (Lo-K) insulator ceramic material, layer 12 a Hi-K dielectric material, layer 14 a Lo-K material, layer 16 a glass material, layer 18 a Lo-K material, and layer 20 a Hi-K material. There also can be a infinite variety of layer arrangements of compatible materials, for example, ferrite films, piezoelectric films, resistive films or semiconductor films, etc.

This arrangement can also be extended so as to provide vertical inserts within each of the plurality of layers, as illustrated in Fig. 2. For example, Lo-K glass inserts 22 and 24 can be disposed in an upper Lo-K ceramic layer 26. Insert 28 is constituted by a Hi-K ceramic insert in a Lo-K insulator layer 30. Region 32 comprises a Lo-K insulator in a Hi-K ceramic layer 34. Finall...