Patents by Inventor Michael A. Kropp
Michael A. Kropp has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20020062919Abstract: A method of laminating a structure comprises at least two layers and a photopolymerizable adhesive composition between the layers, at least one of the layers being opaque, colored, or reflective. One or both of the layers is transmissive to actinic radiation in wavelengths in the range of greater than 400 nm and up to 1200 nm. The photopolymerizable adhesive composition absorbs radiation in the identified spectral region of the radiation transmissive layer. Curing is effected by directing radiation in the identified spectral region through the radiation transmissive layer and produces a laminated structure.Type: ApplicationFiled: July 30, 1999Publication date: May 30, 2002Inventors: JOEL D. OXMAN, MICHAEL A. KROPP
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Patent number: 6395124Abstract: A method of laminating a structure comprises at least two layers and a photopolymerizable adhesive composition between the layers, at least one of the layers being opaque, colored, or reflective. One or both of the layers is transmissive to actinic radiation in wavelengths in the range of greater than 400 nm and up to 1200 nm. The photopolymerizable adhesive composition absorbs radiation in the identified spectral region of the radiation transmissive layer. Curing is effected by directing radiation in the identified spectral region through the radiation transmissive layer and produces a laminated structure. An underfilled flip chip assembly on an integrated circuit board substrate can be prepared by the method described above.Type: GrantFiled: July 30, 1999Date of Patent: May 28, 2002Assignee: 3M Innovative Properties CompanyInventors: Joel D. Oxman, Michael A. Kropp
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Publication number: 20020032280Abstract: The invention provides adhesives and adhesive compositions that comprise epoxy resin and non-volatile anhydride. One embodiment further comprises a hydroxyl containing compound that is insoluble in the epoxy resin/anhydride blend at mixing temperatures which reacts with the anhydride at solder reflow temperatures to form a fluxing agent in-situ. Another embodiment further comprises catalyst.Type: ApplicationFiled: June 25, 2001Publication date: March 14, 2002Applicant: 3M Innovative Properties CompanyInventors: Scott B. Charles, Robert J. Kinney, Michael A. Kropp, Roger A. Mader
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Publication number: 20010053718Abstract: An annular disk for flexible shaft couplings is described, whose two coupling halves each exhibiting a connection flange are connected to each other via a packet of such annular disks in a torsionally rigid manner, but in such a way as to enable their axial and angular movement. The annular disk has four attachment holes uniformly distributed on a shared hole circle, wherein the section is tapered between two adjacent attachment holes.Type: ApplicationFiled: April 9, 2001Publication date: December 20, 2001Applicant: ATEC-Weiss GmbH & Co. KGInventors: Michael Kropp, Patrice Millet
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Patent number: 6294259Abstract: This invention relates to a polyimide hybrid adhesive comprised of an epoxy component, an epoxy curing agent, and a polyimide oligomer of molecular weight of up to about 8,000 (Mn) having repeating units of Formula (1): The adhesives are particularly useful in applications where thermal stability and high adhesive strength are required.Type: GrantFiled: July 6, 2000Date of Patent: September 25, 2001Assignee: 3M Innovative Properties CompanyInventors: Gregory J. Anderson, Scott B. Charles, Michael A. Kropp
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Patent number: 6126865Abstract: Pressure sensitive adhesives and heat activatable adhesives that are the reaction product of an acrylic acid ester of a monohydric alcohol whose homopolymer has a T.sub.g less than 0.degree. C.; a non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a T.sub.g greater than 15.degree. C.; 0-5 parts by weight of a polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of greater than 10.50 and a T.sub.g greater than 15.degree. C.; and an electrically conductive agent.Type: GrantFiled: March 11, 1997Date of Patent: October 3, 2000Assignee: 3M Innovative Properties CompanyInventors: Christopher A. Haak, Michael A. Kropp, Greggory S. Bennett
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Patent number: 6069214Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.Type: GrantFiled: April 27, 1998Date of Patent: May 30, 2000Assignee: 3M Innovative Properties CompanyInventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
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Patent number: 6069219Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.Type: GrantFiled: April 27, 1998Date of Patent: May 30, 2000Assignee: 3M Innovative Properties CompanyInventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
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Patent number: 5863664Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.Type: GrantFiled: July 17, 1996Date of Patent: January 26, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
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Patent number: 5856022Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.Type: GrantFiled: November 9, 1995Date of Patent: January 5, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
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Patent number: 5744557Abstract: A composition of matter including a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.Type: GrantFiled: June 16, 1993Date of Patent: April 28, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
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Patent number: 5685939Abstract: A Z-axis adhesive is produced by dispersing electrically-conductive particles in an organic binder and then imagewise exposing the material to electromagnetic radiation, preferably from a laser or a flash lamp, under conditions sufficient to transfer the particles from the binder to a receptor in a patterned fashion such that the resulting adhesive is a Z-axis conductor in the patterned areas. The patterned adhesive can then be used to establish electrical interconnection between facing electrodes of a number of different structures including semiconductor chips and a flexible printed circuit board.Type: GrantFiled: March 10, 1995Date of Patent: November 11, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Martin B. Wolk, Thomas A. Isberg, Michael A. Kropp, William V. Dower, Joel A. Gerber
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Patent number: 5672400Abstract: The present invention provides a microelectronic assembly wherein a semi-crystalline copolymer adhesive composition, preferably provided in the form of a film, is used to electrically interconnect a first circuit pattern on a first substrate to a second circuit pattern on a second substrate. The adhesive composition preferably includes a semi-crystalline copolymer comprising polyether and polyamide monomeric units, a tackifier, and conductive particles.Type: GrantFiled: December 21, 1995Date of Patent: September 30, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Dennis D. Hansen, Michael A. Kropp, Glen Connell
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Patent number: 5620795Abstract: Pressure sensitive adhesives and heat activatable adhesives that are the reaction product of an acrylic acid ester of a monohydric alcohol whose homopolymer has a T.sub.g less than 0.degree. C.; a non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a T.sub.g greater than 15.degree. C.; 0-5 parts by weight of a polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of greater than 10.50 and a T.sub.g greater than 15.degree. C.; and an electrically conductive agent.Type: GrantFiled: July 10, 1995Date of Patent: April 15, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Christopher A. Haak, Michael A. Kropp, Greggory S. Bennett
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Patent number: 5554664Abstract: An energy-sensitive (e.g., thermal, radiation or photosensitive) initiator, curative, and/or catalytic salt that has an anion comprising a tris-(highly fluorinated alkylsulfonyl)methide, tris-(fluorinated arylsulfonyl)methide, bis-(highly fluorinated alkyl)sulfonyl imide, bis-(fluorinated aryl)sulfonyl imide, mixed aryl- and alkylsulfonyl imides and methides and any combinations thereof, has improved solubility in organic solvents, exhibit minimal corrosiveness when coatings and adhesives are prepared using the initiator, curative and/or catalytic salts, generates a highly reactive initiator, curative, and/or catalyst upon activation by energy.Type: GrantFiled: November 17, 1995Date of Patent: September 10, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventors: William M. Lamanna, Michael C. Palazzotto, Wayne S. Mahoney, Michael A. Kropp
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Patent number: 5399637Abstract: Polymerizable compositions having at least one cationically polymerizable monomer; an optional free radically polymerizable monomer; an energy-polymerizable catalyst system wherein the catalyst system comprises an organometallic complex salt; a thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with the metal ion of the organometallic complex salt; optionally, a peroxide. The polymerized compositions are useful as cured adhesive films, pressure sensitive adhesives, protective coatings, liquid adhesives, structural and semi-structural adhesives, and free standing films.Type: GrantFiled: July 29, 1993Date of Patent: March 21, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventors: Peggy S. Willett, Janis Robins, Kent S. Tarbutton, Michael A. Kropp
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Patent number: 5362421Abstract: An anisotropically conductive adhesive composition provides electrical conductivity between facing electrodes but maintains electric insulation laterally between adjacent electrodes and comprises (a) a cationically polymerizable monomer, such as a glycidyl epoxy resin; (b) a thermoplastic resin, essentially free of nucleophilic or metal complexing functional groups; (c) optionally, an alcohol containing material; (d) a thermally initiated catalyst system comprising: (1) a salt of an organometallic cation; (2) a cure rate enhancer; and (3) a stabilizing additive; (e) conductive particles; and (f) optionally, a silane coupling agent, wherein the adhesive compositions cure at a temperature of 120.degree.-125.degree. C.Type: GrantFiled: June 16, 1993Date of Patent: November 8, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Michael A. Kropp, Wayne S. Mahoney
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Patent number: 5310840Abstract: Polymerizable compositions having at least one cationically polymerizable monomer; an optional free radically polymerizable monomer; an energy-polymerizable catalyst system wherein the catalyst system comprises an organometallic complex salt; a thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with the metal ion of the organometallic complex salt; optionally, a peroxide. The polymerized compositions are useful as cured adhesive films, pressure sensitive adhesives, protective coatings, liquid adhesives, structural and semi-structural adhesives, and free standing films.Type: GrantFiled: July 29, 1993Date of Patent: May 10, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Peggy S. Willett, Janis Robins, Kent S. Tarbutton, Michael A. Kropp
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Patent number: 5252694Abstract: Polymerizable compositions having at least one cationically polymerizable monomer; an optional free radically polymerizable monomer; an energy-polymerizable catalyst system wherein the catalyst system comprises an organometallic complex salt; a thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with the metal ion of the organometallic complex salt; optionally, a peroxide. The polymerized compositions are useful as cured adhesive films, pressure sensitive adhesives, protective coatings, liquid adhesives, structural and semi-structural adhesives, and free standing films.Type: GrantFiled: January 22, 1992Date of Patent: October 12, 1993Assignee: Minnesota Mining and Manufacturing CompanyInventors: Peggy S. Willett, Janis Robins, Kent S. Tarbutton, Michael A. Kropp