Multi-layer wiring board

Details Multi-layer wiring board Multi-layer wiring board

1991-09-20

1994-01-04

Ryan, Patrick J.

Stock material or miscellaneous articles

Composite

Of quartz or glass

428209, 428210, 428323, 428406, 428901, B32B 900

Patent

active

052758893

ABSTRACT:
A laminated multi-layer wiring board comprising alternate layers of a glass ceramic material and conductor pattern. The glass ceramic layers are made of a glass ceramic comprising glass and dispersed ceramic particles. The glass ceramic layers further contain hollow or porous silica glass spheres dispersed in the glass ceramic. The hollow or porous silica glass spheres are covered with a ceramic coating layer containing aluminum as a constituent element. Such a structure prevents crystallization of the silica spheres and the resultant rapid increase in the thermal expansion coefficient of the glass ceramic layer. The structure also procludes the formation of pores in the surfaces of the spheres.

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