Patents by Inventor Daniel D. Lofgreen

Daniel D. Lofgreen 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).

  • Patent number: 11508684
    Abstract: A direct bond hybridization (DBH) method is provided. The DBH method includes preparing a first underlying layer, a first contact layer disposed on the first underlying layer and a first contact electrically communicative with the first underlying layer and protruding through the first contact layer, preparing a second underlying layer, a second contact electrically communicative with the second underlying layer and formed of softer material than the first contact and a second contact layer disposed on the second underlying layer and defining an aperture about the second contact and a moat at least partially surrounding the second contact and bonding the first and second contact layers whereby the first contact contacts the second contact such that the second contact deforms and expands into the moat.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: November 22, 2022
    Assignee: RAYTHEON COMPANY
    Inventors: Jonathan Getty, Daniel D. Lofgreen, Alexandra V. Miller
  • Publication number: 20210210455
    Abstract: A direct bond hybridization (DBH) method is provided. The DBH method includes preparing a first underlying layer, a first contact layer disposed on the first underlying layer and a first contact electrically communicative with the first underlying layer and protruding through the first contact layer, preparing a second underlying layer, a second contact electrically communicative with the second underlying layer and formed of softer material than the first contact and a second contact layer disposed on the second underlying layer and defining an aperture about the second contact and a moat at least partially surrounding the second contact and bonding the first and second contact layers whereby the first contact contacts the second contact such that the second contact deforms and expands into the moat.
    Type: Application
    Filed: January 8, 2020
    Publication date: July 8, 2021
    Inventors: Jonathan Getty, Daniel D. Lofgreen, Alexandra V. Miller
  • Patent number: 10475664
    Abstract: In one aspect, a method includes heating a wafer chuck, heating a first wafer, depositing a first epoxy along at least a portion of a surface of the first wafer disposed on the wafer chuck, spinning the wafer chuck to spread the first epoxy at least partially across the first wafer, placing a second wafer on the first epoxy disposed on the first wafer and bonding the second wafer to the first epoxy under vacuum to form a two-wafer-bonded structure.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: November 12, 2019
    Assignee: RAYTHEON COMPANY
    Inventors: Andrew Cahill, Jonathan Getty, Daniel D. Lofgreen, Paul A. Drake
  • Patent number: 10300649
    Abstract: Methods and apparatus for enhancing the flatness of a die by applying adhesive to a shim having a selected flatness, rotating the shim to spread the adhesive to a layer having a uniform thickness, evacuating a chamber to create a vacuum; manipulating a die onto the adhesive layer in the chamber; and reducing a level of the vacuum to pressure the die onto the adhesive layer such that the bow in the die is reduced as the die conforms to the shim.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 28, 2019
    Assignee: Raytheon Company
    Inventors: Andrew Cahill, Sean F. Harris, Daniel D. Lofgreen
  • Publication number: 20190061221
    Abstract: Methods and apparatus for enhancing the flatness of a die by applying adhesive to a shim having a selected flatness, rotating the shim to spread the adhesive to a layer having a uniform thickness, evacuating a chamber to create a vacuum; manipulating a die onto the adhesive layer in the chamber; and reducing a level of the vacuum to pressure the die onto the adhesive layer such that the bow in the die is reduced as the die conforms to the shim.
    Type: Application
    Filed: November 30, 2017
    Publication date: February 28, 2019
    Applicant: Raytheon Company
    Inventors: Andrew Cahill, Sean F. Harris, Daniel D. Lofgreen
  • Publication number: 20180096833
    Abstract: In one aspect, a method includes heating a wafer chuck, heating a first wafer, depositing a first epoxy along at least a portion of a surface of the first wafer disposed on the wafer chuck, spinning the wafer chuck to spread the first epoxy at least partially across the first wafer, placing a second wafer on the first epoxy disposed on the first wafer and bonding the second wafer to the first epoxy under vacuum to form a two-wafer-bonded structure.
    Type: Application
    Filed: November 22, 2017
    Publication date: April 5, 2018
    Applicant: Raytheon Company
    Inventors: Andrew Cahill, Jonathan Getty, Daniel D. Lofgreen, Paul A. Drake
  • Publication number: 20180068843
    Abstract: In one aspect, a method includes heating a wafer chuck, heating a first wafer, depositing a first epoxy along at least a portion of a surface of the first wafer disposed on the wafer chuck, spinning the wafer chuck to spread the first epoxy at least partially across the first wafer, placing a second wafer on the first epoxy disposed on the first wafer and bonding the second wafer to the first epoxy under vacuum to form a two-wafer-bonded structure.
    Type: Application
    Filed: September 7, 2016
    Publication date: March 8, 2018
    Applicant: Raytheon Company
    Inventors: Andrew Cahill, Jonathan Getty, Daniel D. Lofgreen, Paul A. Drake