Patents Assigned to Sophia Systems Co., Ltd.
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Patent number: 5989362Abstract: A polymer-based solder paste composition having the strength and corrosion resistance of joints produced by conventional solder technology and the environmental and processing advantages of ICA technology comprises a powdered solder metal with a single component (single package) polymerizable flux composition. In one embodiment the polymerizable flux composition includes 55-70% by weight of an epoxy such as epoxy novolac, the diglycidyl ethers of bisphenol A and F, and mixtures thereof, 0-15% by weight of a dicarboxylic acid, 3-5% by weight of an amine thermal curing agent, and the balance may include a polyalcohol, a chelating agent, a defoamer, a thixotrope and a surfactant. In another embodiment the polymerizable flux composition includes approximately 55-70% by weight of an epoxy such as trifunctional epoxide of p-aminophenol, approximately 20-30% by weight of a liquid organic acid such as a carboxy-acrylate, and approximately 4-10% by weight of an amine thermal curing agent.Type: GrantFiled: September 15, 1997Date of Patent: November 23, 1999Assignee: Sophia Systems Co., Ltd.Inventors: Joram Diamant, Henry L. Myers
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Patent number: 5851311Abstract: A polymer-based solder paste composition having the strength and corrosion resistance of joints produced by conventional solder technology and the environmental and processing advantages of ICA technology comprises a powdered solder metal with a single component (single package) polymerizable flux composition. The polymerizable flux composition includes 55%-65% by weight of an epoxy such as epoxy novolac, the diglycidyl ethers of bisphenol A and F, and mixtures thereof, 0-15% by weight of a dicarboxylic acid, 9%-11% by weight of a polyalcohol, 3%-5% by weight of an amine thermal curing agent, and the balance including a chelating agent, a defoamer, a thixotrope and a surfactant. Upon heating, the solder metal spontaneously segregates from the flux composition, fuses, and forms a metallurgical joint, while the single-component polymerizable flux composition encapsulates the fused metal in a polymer coating which remains firm but pliable at reflow temperatures.Type: GrantFiled: March 29, 1996Date of Patent: December 22, 1998Assignee: Sophia Systems Co., Ltd.Inventors: Joram Diamant, Henry L. Myers
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Patent number: 5514729Abstract: A dimensionally stable, UV hardenable polymeric composition is provided in which a conductive filler material is combined with a solventless resin formulation comprising a low viscosity epoxide compound, a photo initiator, and a thermal cure initiator. The properties of the polymeric composition may be adjusted through the addition of reactive diluents, poly alcohol flexiblizers, and acrylate based polymers, photo initiators, and thermal cure initiators. Conductive traces produced by extruding the polymeric composition through a syringe are subjected to a preliminary UV hardening step followed by deposition of an insulator layer and additional conductive traces, until all layers of conductive traces have been deposited. The structure is then subjected to heat until the conductive traces are fully cured. The formulation and the process described produce traces with bulk conductivity at least two times higher than any comparable conductive polymer, without using solvents.Type: GrantFiled: June 27, 1995Date of Patent: May 7, 1996Assignee: Sophia Systems Co., Ltd.Inventors: Joram Diamant, Henry L. Myers
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Patent number: 5449407Abstract: Extrusion apparatus and method includes a chamber of alterable volume having an outlet and a vent in a movable wall of the chamber to facilitate sealing the chamber upon application of force to the movable wall to displace viscous, fluid composition from within the chamber through the outlet and along a desired path. After displacement of a volume of the composition from the chamber, the vent is relieved to promote expansion of the composition within the chamber through the vent rather than through the outlet. The composition may be cured to substantially non-fluid condition along the desired path in response to applied thermal and/or ultraviolet radiant energy to provide traces of selected electrical properties on a work surface.Type: GrantFiled: February 1, 1994Date of Patent: September 12, 1995Assignee: Sophia Systems Co., Ltd.Inventors: Philip J. Breeden, Adam J. Bell, Joram Diamant, Edmund S. Lewandowski
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Patent number: 5376414Abstract: Extrusion apparatus and method includes a chamber of alterable volume having an outlet and a vent in a movable wall of the chamber to facilitate sealing the chamber upon application of force to the movable wall to displace viscous, fluid composition from within the chamber through the outlet and along a desired path. After displacement of a volume of the composition from the chamber, the vent is relieved to promote expansion of the composition within the chamber through the vent rather than through the outlet. The composition may be cured to substantially non-fluid condition along the desired path in response to applied thermal and/or ultraviolet radiant energy to provide traces of selected electrical properties on a work surface.Type: GrantFiled: June 1, 1993Date of Patent: December 27, 1994Assignee: Sophia Systems Co., Ltd.Inventors: Philip J. Breeden, Adam J. Bell, Joram Diamant, Edmund S. Lewandowski
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Patent number: D350123Type: GrantFiled: May 20, 1992Date of Patent: August 30, 1994Assignee: Sophia Systems Co., Ltd.Inventors: Shinbo Makoto, Hagimo Akihiro, Asami Hiromi