Abstract: 1.

Abstract: A gold conductor composition comprising by weight, basis total inorganic solids, finely divided particles of 75-95% metallic gold at least 90% by weight of which gold particle have an aspect ratio of no greater than 2, 0.5-10% cadmium borosilicate glass, 0.1-5% spinel-forming divalent metal oxide selected from the group consisting of CuO, ZnO, MgO, CoO, NiO, FeO, MnO and mixtures thereof, and 0.1-1.0% metal selected from the group consisting of palladium, platinum and rhodium, all of the foregoing particles being dispersed in an organic medium. This composition is useful in electronic packaging for forming conductor patterns on ceramic-based substrates, particularly patterns on which metallic components are bonded by brazing.

Abstract: A semi-aqueous developable copper conductive composition which is fireable in a nonoxidizing atmosphere is developable in an aqueous solution containing 0.63 percent by weight sodium borate and 8.7 percent by weight butyl cellusolve.

Abstract: A semi-aqueous developable photosensitive gold conductive composition which is fireable in a nonoxidizing atmosphere is developable in an aqueous solution containing 0.63 percent by weight sodium borate and 8.7 percent by weight butyl cellusolve.

Abstract: A process for brazing a metallized component to a metallized ceramic-based substrate comprising the steps of:(a) applying a second conductor composition over the metallizations on the substrate such that the metallizations are covered by said second conductor composition which consists essentially of a metal powder and an organic medium;(b) drying said second conductor composition;(c) firing said second conductor composition at a temperature sufficient to sinter the metal powder of the second conductor composition and drive off said organic medium thereby forming a second metallization layer;(d) forming an assembly by positioning at least one metallized component on said second metallization layer and a brazing composition at the component-second metallization layer interface; and(e) heating said assembly at a temperature sufficient for said brazing composition to form a joint between said component and said second metallization layer.

Abstract: A photosensitive aqueous developable photosensitive gold conductive composition is disclosed which is fireable in a nonoxidizing atmosphere is developable in an aqueous solution containing 0.8 percent by weight sodium carbonate.

Abstract: A photosensitive aqueous developable photosensitive copper conductive composition is disclosed which is fireable in a nonoxidizing atmosphere is developable in an aqueous solution containing 0.8 percent by weight sodium carbonate.

Abstract: A photosensitive ceramic coating composition which is fireable in a substantially nonoxidizing atmosphere comprising an admixture of:(a) finely divided particles of ceramic solids,(b) finely divided particles of an inorganic binder dispersed in an organic medium comprising(c) an organic polymeric binder, and(d) a photoinitiation system, dissolved in(e) photohardenable monomer, and(f) an organic mediumwherein the improvement comprises an organic polymeric binder containing a copolymer or interpolymer of a C.sub.1 -C.sub.10 alkyl acrylate, C.sub.1 -C.sub.10 methacrylate, styrene, and an ethylenically unsaturated carboxylic acid, wherein a moiety in the binder derived from the unsaturated carboxylic acid comprises from 5 to less than 15 weight percent of the polymer and wherein the binder has a molecular weight not greater than 100,000 and wherein the composition upon imagewise exposure to actinic radiation is developable in an organic solvent-water mixture.

Abstract: A photosensitive ceramic coating composition which is fireable in a substantially nonoxidizing atmosphere comprising an admixture of:(a) finely divided particles of ceramic solids having a surface area-to-weight ratio of no more than 10 m.sup.2 /g and at least 80 wt. % of the particles having a size of 1-10 .mu.m, and(b) finely divided particles of an inorganic binder having a glass transition temperature in the range from the 550.degree. to 825.degree. C., a surface area-to-weight ratio of no more than 10 m.sup.2 /g and at least 90 wt. % of the particles having a size of 1-10 .mu.m, the weight ratio of (b) to (a) being in a range from 0.6 to 2, dispersed in an organic medium comprising(c) an organic polymeric binder, and(d) a photoinitiation system, dissolved in(e) photohardenable monomer, and(f) an organic mediumwherein the improvement comprises an organic polymeric binder containing a copolymer or interpolymer of a C.sub.1 -C.sub.10 alkyl acrylate, C.sub.1 -C.sub.

Abstract: A photosensitive ceramic coating composition which is fireable in a substantially nonoxidizing atmosphere comprising an admixture of:(a) finely divided particles of ceramic solids having a surface area-to-weight ration of no more than 10 m.sup.2 /g and at least 80 wt. % of the particles having a size of 1-10 .mu.m, and(b) finely divided particles of an inorganic biner having a glass transition temperature in the range from of 550.degree. to 825.degree. C., a surface area-to-weight ration of no more than 10 m.sup.2 /g and at least 90 wt. % of the particles having a size of 1-10 .mu.m, the weight ratio of (b) to (a) being in a range from 0.6 to 2, dispersed in an organic medium comprising(c) an organic polymeric binder, and(d) a photoinitiation system, dissolved in(e) photohardenable monomer, and(f) an organic mediumwherein the improvement comprises an organic polymeric binder containing a copolymer or interpolymer of a C.sub.1 -C.sub.10 alkyl acrylate, C.sub.1 -C.sub.

Abstract: A photosensitive ceramic coating composition which is fireable in a substantially nonoxidizing atmosphere comprising an admixture of:(a) finely divided particles of ceramic solids,(b) finely divided particles of an inorganic binder dispersed in an organic medium comprising(c) an organic polymeric binder, and(d) a photoinitiation system, dissolved in(e) photohardenable monomer, and(f) an organic mediumwherein the improvement comprises an organic polymeric binder containing a copolymer or interpolymer of a C.sub.1 -C.sub.10 alkyl acrylate, C.sub.1 -C.sub.10 methacrylate, styrene, and an ethylenically unsaturated carboxylic acid, wherein a moiety in the binder derived from the unsaturated carboxylic acid comprises from 5 to less than 15 weight percent of the polymer and wherein the binder has a molecular weight not greater than 100,000 and wherein the composition upon imagewise exposure to actinic radiation is developable in an organic solvent-water mixture.

Abstract: Photosensitive compositions contain a surface layer of microcapsules which influence interfacial properties.

Abstract: Photopolymerizable elements comprising a support, a layer of a photopolymerizable composition and a protective layer, the photopolymerizable layer having in reactive association therewith, e.g., dispersed therein or in contact with the surface, pressure rupturable microcapsules containing therein at least one active component for the photopolymerizable composition, e.g., ethylenically unsaturated compound, sensitizer, photoinitiator, oxygen scavenger, and plasticizer. Processes for the preparation of an activated photopolymerizable element and use are described wherein the microcapsules are ruptured, i.e., prior to imagewise exposure and development. The photopolymerizable elements are useful as color proofs, printing plates, etc.

Abstract: Photopolymerizable crystalline composition having a crystallinity index of at least 0.2 which comprises: (a) at least one ethylenically unsaturated monomer, (b) at least one photoinitiator, (c) at least one acidic polymeric binder and (d) a crystalline matrix forming compound having a melting point of 50.degree. to 200.degree. C. The compositions are useful in film form as photoresists, litho films, etc.

Abstract: A photopolymerizable coating composition comprising(1) a nongaseous, ethylenically unsaturated, polymerizable compound,(2) a specified acidic o-nitroaromatic compound, and(3) an organic, radiation-sensitive, free-radical generating system which is useful for making a positive or negative polymeric image on a substrate.

Abstract: Photoactive, thermally coalescible resin plastisol dispersions comprising a polyvinyl chloride polymer having attached to the polymer backbone photopolymerizable or photocrosslinkable groups dispersed in a liquid plasticizer medium, and a photoinitiator which is either a separate component or a photoactive substituent present on the polymer backbone. The photoactive plastisols, in element form, can be used in an image formation process that is a positive working washout or negative toned imaging system.

Abstract: Photoactive, thermally coalescible resin plastisol dispersions comprising a polyvinyl chloride polymer having attached to the polymer backbone photopolymerizable or photocrosslinkable groups dispersed in a liquid plasticizer medium, and a photoinitiator which is either a separate component or a photoactive substituent present on the polymer backbone. The photoactive plastisols, in the element form, can be used in an image formation process that is positive working washout or negative toned imaging system.

Abstract: A photohardenable composition especially suitable for use in solid imaging. The compositions are characterized by their improved photospeed in combined with excellent initial green strength. The compositions allows for the production of articles by solid imaging processing techniques that show little or no distortion, high accuracy, excellent clarity. The compositions are low in toxicity and have low sensitivity to water.