International Business Machines Corporation

James M Brownlow

Thomas S Plaskett

Robert Rosenberg

Ifay Fay Chang

The bonding of an external metal taken from the group of Cu, Ni, Fe, Ti, Mo and alloys thereof to an oxide ceramic substrate is accomplished through the use of an ionic diffusion accommodating metal oxide where the ionic diffusion oxide metal is taken from the group of Fe, Mn, Ti and the combination 33 Ni 67 V. The bond adhesion and processing parameters can be enhanced by addition of Li, Ni, Cu, Co and Mo and the ceramic can be at least one member of the group of glass, pyrex, Al.sub.2 O.sub.3 and SiO.sub.2 glass.

Bonding metal to ceramic like materials

In a process for sintering a metal member bonded to a substrate during which the metal member undergoes densification at a temperature which is different from the curing temperature of the substrate, an improvement is provided which comprises causing the densification temperature of the metal member to be closer to or identical with the curing temperature of the substrate by adding to said metal member prior to sintering an amount of organometallic compound which undergoes decomposition before the densification temperature of the metal member has been reached to provide under the sintering conditions employed a densification temperature-modifying amount of a metal or metal oxide which can be the same as or different from the metal of the aforesaid metal member. The improved sintering process of the present invention is particularly adapted for use in the fabrication of multilayer ceramic substrates which serve as circuit modules for seminconductor chips.

Control of the sintering of powdered metals

A process is described for the sintering and densification of ceramic materials containing hydrocarbon materials to produce ceramic bodies substantially free from carbonaceous residues of such hydrocarbon materials by compacting ceramic particles and a binder containing a pyrolysis catalyst selected from the group consisting of nickel and palladium ions, heating in a low oxygen atmosphere to a temperature in the range of 350.degree. to 780.degree. C. to remove the carbonaceous residue and further heating the material to produce a sintered, dense ceramic body.

Process for the removal of carbon residues during sintering of ceramics

Improved zinc silicate phosphor particles are made by using silicic acid particles in the range from 0.7 to 10 micrometers coated with Mn.sub.2 O.sub.3 .multidot.xH.sub.2 O and then a layer of ZnO particles about an order of magnitude smaller which are fired to form the phosphors. The particle size is held within the range preferred and preferably is even narrower. The particles are not milled or mechanically crushed. Instead, the ZnO powder prevents agglomeration during firing. Baths are provided for formation of the particles prior to firing. Brightness and persistance are improved over conventional phosphors.

Zinc silicate phosphor particles and method for making them

Luminescent material may be fabricated of silicon dioxide containing as activators approximately up to 1% monovalent copper together with up to approximately 15% aluminum. The material may be in powder form, it may be in glass form or it may be produced by electrolytic ingredient transfer. The material is luminescent in the blue range from 380-580 nanometers.

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Crompond, NY, United States of America

James M Brownlow