Patents by Inventor Shujiro Sadanaga

Shujiro Sadanaga 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: 9748195
    Abstract: The present invention aims to provide a method for producing a semiconductor device, the method being capable of achieving high reliability by suppressing voids. The present invention also aims to provide a flip-chip mounting adhesive for use in the method for producing a semiconductor device. The present invention relates to a method for producing a semiconductor device, including: step 1 of positioning a semiconductor chip on a substrate via an adhesive, the semiconductor chip including bump electrodes each having an end made of solder; step 2 of heating the semiconductor chip at a temperature of the melting point of the solder or higher to solder and bond the bump electrodes of the semiconductor chip to an electrode portion of the substrate, and concurrently to temporarily attach the adhesive; and step 3 of removing voids by heating the adhesive under a pressurized atmosphere, wherein the adhesive has an activation energy ?E of 100 kJ/mol or less, a reaction rate of 20% or less at 2 seconds at 260° C.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: August 29, 2017
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Sayaka Wakioka, Hiroaki Nakagawa, Yoshio Nishimura, Shujiro Sadanaga
  • Publication number: 20160056120
    Abstract: The present invention aims to provide a method for producing a semiconductor device, the method being capable of achieving high reliability by suppressing voids. The present invention also aims to provide a flip-chip mounting adhesive for use in the method for producing a semiconductor device. The present invention relates to a method for producing a semiconductor device, including: step 1 of positioning a semiconductor chip on a substrate via an adhesive, the semiconductor chip including bump electrodes each having an end made of solder; step 2 of heating the semiconductor chip at a temperature of the melting point of the solder or higher to solder and bond the bump electrodes of the semiconductor chip to an electrode portion of the substrate, and concurrently to temporarily attach the adhesive; and step 3 of removing voids by heating the adhesive under a pressurized atmosphere, wherein the adhesive has an activation energy ?E of 100 kJ/mol or less, a reaction rate of 20% or less at 2 seconds at 260° C.
    Type: Application
    Filed: November 5, 2015
    Publication date: February 25, 2016
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Sayaka WAKIOKA, Hiroaki NAKAGAWA, Yoshio NISHIMURA, Shujiro SADANAGA
  • Patent number: 9209155
    Abstract: The present invention aims to provide a method for producing a semiconductor device, the method being capable of achieving high reliability by suppressing voids. The present invention also aims to provide a flip-chip mounting adhesive for use in the method for producing a semiconductor device. The present invention relates to a method for producing a semiconductor device, including: step 1 of positioning a semiconductor chip on a substrate via an adhesive, the semiconductor chip including bump electrodes each having an end made of solder; step 2 of heating the semiconductor chip at a temperature of the melting point of the solder or higher to solder and bond the bump electrodes of the semiconductor chip to an electrode portion of the substrate, and concurrently to temporarily attach the adhesive; and step 3 of removing voids by heating the adhesive under a pressurized atmosphere, wherein the adhesive has an activation energy ?E of 100 kJ/mol or less, a reaction rate of 20% or less at 2 seconds at 260° C.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: December 8, 2015
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Sayaka Wakioka, Hiroaki Nakagawa, Yoshio Nishimura, Shujiro Sadanaga
  • Patent number: 9011629
    Abstract: An adhesive for electronic components, including a curable compound, a curing agent, and an inorganic filler, wherein A1 and A2/A1 fall within a range surrounded by solid lines and a dashed line in Fig. 1A wherein a viscosity at 5 rpm measured at 25° C. using an E type viscometer is A1 (Pa·s) and a viscosity at 0.5 rpm measured at 25° C. using an E type viscometer is A2 (Pa·s), the range including values on the solid lines but not including values on the dashed line, and a blending amount of the curing agent is 5 to 150 parts by weight and a blending amount of the inorganic filler is 60 to 400 parts by weight based on 100 parts by weight of the curable compound.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: April 21, 2015
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Carl Alvin Dilao, Akinobu Hayakawa, Shujiro Sadanaga, Munehiro Hatai
  • Publication number: 20150064847
    Abstract: The present invention aims to provide a method for producing a semiconductor device, the method being capable of achieving high reliability by suppressing voids. The present invention also aims to provide a flip-chip mounting adhesive for use in the method for producing a semiconductor device. The present invention relates to a method for producing a semiconductor device, including: step 1 of positioning a semiconductor chip on a substrate via an adhesive, the semiconductor chip including bump electrodes each having an end made of solder; step 2 of heating the semiconductor chip at a temperature of the melting point of the solder or higher to solder and bond the bump electrodes of the semiconductor chip to an electrode portion of the substrate, and concurrently to temporarily attach the adhesive; and step 3 of removing voids by heating the adhesive under a pressurized atmosphere, wherein the adhesive has an activation energy ?E of 100 kJ/mol or less, a reaction rate of 20% or less at 2 seconds at 260° C.
    Type: Application
    Filed: August 5, 2013
    Publication date: March 5, 2015
    Inventors: Sayaka Wakioka, Hiroaki Nakagawa, Yoshio Nishimura, Shujiro Sadanaga
  • Publication number: 20130237018
    Abstract: An object of the present invention is to provide an adhesive for electronic components that allows suppression of occurrence of voids and is prevented from wicking up to an upper surface of a semiconductor chip. Another object of the present invention is to provide a production method for a semiconductor chip mount using the adhesive for electronic components. The present invention is an adhesive for electronic components, including a curable compound, a curing agent, and an inorganic filler, wherein A1 and A2/A1 fall within a range surrounded by solid lines and a dashed line in FIG. 1 wherein a viscosity at 5 rpm measured at 25° C. using an E type viscometer is A1 (Pa·s) and a viscosity at 0.5 rpm measured at 25° C.
    Type: Application
    Filed: March 8, 2012
    Publication date: September 12, 2013
    Applicant: Sekisui Chemical Co., Ltd.
    Inventors: Carl Alvin Dilao, Akinobu Hayakawa, Shujiro Sadanaga, Munehiro Hatai