International Business Machines Corporation

Peter Bakos

Russell E Darrow

Joseph Funari

John Rasile

Richard M Poliak

Dennis L Rivenburgh

Irving Memis

Nelson P Franchak

Raymond W Angelo

Gerald A Bendz

Lawrence M Baldauf

Duane T Napp

Roger E Haggett

William F Williams

Diane L Redpath

A process for making printed circuit cards is disclosed wherein a copper clad, insulating substrate having a layer of copper from which circuitry lines and patterns will be fabricated, is coated with a thin layer of nickel prior to forming any circuit patterns.

Raw card fabrication process with nickel overplate

A structure comprising on a substrate successive layers of metal circuitry having therebetween as a dielectric a cured polyimide composition containing a polyimide and aluminum oxide or zinc oxide or mixtures thereof. The structure is produced by a method including the following process steps:

Structure containing a layer consisting of a polyimide and an organic

An elongated member is provided in the discharge orifice of a spray head nozzle so that the fluid being sprayed is discharged as a hollow stream resulting inter alia in a better and more complete atomization of the fluid in coaction with a low pressure propellant.

Spray head apparatus

An aqueous acidic composition suitable for etching containing an acid and polyvinyl alcohol and use thereof.

Etchant composition and use thereof

Cured epoxy compositions are removed from substrates by employing compositions containing an organic cyclic alcohol and a surface-active agent.

Composition containing alcohol and use thereof for epoxy removal

A cleaning composition which includes N-methyl-2-pyrrolidone and an alkanolamine, and use thereof for cleaning substrates.

Cleaning composition and use thereof

A screenable and strippable solder mask composition which contains a polyepoxide or polyimide/amide; a detackifier and a high-temperature resistant filler; and use thereof for protecting predetermined areas on a substrate from the solder deposition.

Screenable and strippable solder mask and use thereof

The porosity and surface roughness of ceramic substrates are improved by coating the surface with silicon compounds, drying the coated substrate, and then subjecting the substrate to elevated temperature so as to convert the silicon compounds to silicon oxides. Coated substrates obtained by the above process as well as specific preferred organosilane compositions are provided.

Decreasing the porosity and surface roughness of ceramic substrates

A film-forming composition comprising an organic flux base material; and a carboxylic acid anhydride and/or aldehyde; and a process for using are provided.

Removable protective coating and process of using same

A ceramic substrate is provided with via holes and these holes are primed by first depositing a palladium coating to the inside surface of the holes and then depositing an iron film onto the palladium. The primed holes are then completely filled with copper to provide conductive connections between opposite surfaces of the substrate. On one side of the substrate, input/output connector pins are brazed to the copper fillings. On the other side, printed circuitry is applied to produce a circuit module.

Method of making metal filled via holes in ceramic circuit boards

A hermetic topsealant for metal electrodes on components and other microelectronic circuitry is formed by polymerizing a mixture of an unsaturated silane monomer, a bifunctional silane adhesion promoter, a polymeric plasticizer and a stabilizer. The purpose of this abstract is to enable the public and the Patent Office to rapidly determine the subject matter of the technical disclosure of the application. This abstract is neither intended to define the invention of the application nor is it intended to be limiting as to the scope thereof.

Hermetic topsealant coating and process for its formation

A positive photoresist having increased sensitivity to light and formed by the addition of an acidic compound to a 1,2-quinone-diazide sulphonic acid ester sensitizer.

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Endicott, NY, United States of America

Peter Bakos