公开(公告)号：US20230331960A1

公开(公告)日：2023-10-19

申请号：US18340368

申请日：2023-06-23

Applicant: FUJIFILM Corporation

Inventor： Tatsuo ISHIKAWA ,  Tetsushi Miyata

IPC: C08K7/18 ,  C08L63/00 ,  C08K5/3492 ,  C08K5/3445 ,  H01F1/14

CPC classification number: C08K7/18 ,  C08L63/00 ,  C08K5/3492 ,  C08K5/3445 ,  H01F1/14 ,  C08K2201/005 ,  C08K2201/003 ,  C08K2201/014 ,  C08L2203/20

Abstract: An object of the present invention is to provide a composition that is capable of forming a magnetic particle-containing cured substance having a high magnetic permeability and a low magnetic loss, and has excellent embedding suitability. Another object of the present invention is to provide a magnetic particle-containing cured substance and an electronic component.
The composition according to an embodiment of the present invention is a composition containing magnetic particles that has an Fe atom content of 70% by mass or more and an epoxy resin, in which the magnetic particles have a peak top in a range of 10 to 30 μm in a particle size distribution curve showing a volume-based frequency distribution, and a content of the magnetic particles is 70% to 90% by mass with respect to a total solid content in the composition.

公开(公告)号：US20210072589A1

公开(公告)日：2021-03-11

申请号：US17087206

申请日：2020-11-02

Applicant: FUJIFILM Corporation

Inventor： Yoshinori TAGUCHI ,  Tatsuo ISHIKAWA ,  Yuki SAKAMOTO

IPC: G02F1/1335 ,  H04N9/04 ,  G02B5/20 ,  G02B1/00

Abstract: A light-shielding resin composition contains: a light-shielding pigment which is one or more selected from the group consisting of metal nitride-containing particles containing an atom A and metal oxynitride-containing particles containing the atom A; and a resin, in which the light-shielding pigment contains at least one of a nitride or an oxynitride of a transition metal having an electronegativity of 1.22 to 1.80, among transition metals of groups 3 to 7, and the atom A is at least one selected from the group consisting of hafnium and tungsten, and is an atom different from the transition metal.

公开(公告)号：US20220013264A1

公开(公告)日：2022-01-13

申请号：US17487269

申请日：2021-09-28

Applicant: FUJIFILM Corporation

Inventor： Tatsuo ISHIKAWA ,  Tatsuo MIKAMI

IPC: H01F1/153 ,  C08F2/50 ,  C08L101/00 ,  C08K3/11

Abstract: The first object of the present invention is to provide a photosensitive resin composition with which a cured film that exhibits a high magnetic permeability real part μ′ and a low magnetic loss tan δ in the high frequency region can be formed. The second object of the present invention is to provide a cured film that is formed by using the photosensitive resin composition and to provide an inductor and an antenna that contain the cured film.
The photosensitive resin composition of the present invention contains a resin that has an ethylenic unsaturated group and a graft chain, or a resin that has a compound having an ethylenic unsaturated group and has a graft chain; an iron-containing particle of which an iron atom content is 10% by mass or more; and a polymerization initiator.

公开(公告)号：US20210108103A1

公开(公告)日：2021-04-15

申请号：US17130760

申请日：2020-12-22

Applicant: FUJIFILM Corporation

Inventor： Tatsuo ISHIKAWA ,  Yoshinori Taguchi ,  Yuki Sakamoto

IPC: C09D151/08 ,  C09D7/65 ,  C09D7/62 ,  C09D5/32 ,  C09D4/06 ,  G02B1/04 ,  G02B5/00

Abstract: A light-shielding composition includes a light-shielding pigment, a resin, a polymerizable compound, which is a low-molecular-weight compound containing an ethylenically unsaturated group, and a polymerization initiator, in which the light-shielding pigment contains an inorganic particle, and an inorganic compound coating the inorganic particle, the inorganic particle contains one or more nitrogen-containing metal compounds selected from the group consisting of zirconium nitride, zirconium oxynitride, vanadium nitride, vanadium oxynitride, niobium nitride, and niobium oxynitride, the inorganic compound contains a silicon atom, and a contained atom number ratio of a total content of metallic atoms, which are selected from the group consisting of a zirconium atom, a vanadium atom, and a niobium atom, to a content of the silicon atom in a surface of the light-shielding pigment, as determined by X-ray photoelectron spectroscopy, is greater than 1.0.

公开(公告)号：US20230238164A1

公开(公告)日：2023-07-27

申请号：US18183976

申请日：2023-03-15

Applicant: FUJIFILM Corporation

Inventor： Tatsuo ISHIKAWA ,  Tetsushi MIYATA

IPC: H01F10/14 ,  H01Q23/00 ,  H01F27/02 ,  H01F41/00

CPC classification number: H01F10/14 ,  H01Q23/00 ,  H01F27/02 ,  H01F41/005

Abstract: An object of the present invention is to provide a composition that can form a magnetic particle-containing film having excellent magnetic permeability and excellent acid resistance, and has excellent sedimentation stability. Another object of the present invention is to provide a magnetic particle-containing film that relates to the composition, and an electronic component that includes the magnetic particle-containing film.
The composition according to an embodiment of the present invention contains magnetic particles that contain 70% to 90% by mass of Fe atoms and have a crystal structure of Fe, an average particle diameter of 2 to 30 μm, and an aspect ratio less than 8, and a rheology control agent.

公开(公告)号：US20220206387A1

公开(公告)日：2022-06-30

申请号：US17696880

申请日：2022-03-17

Applicant: FUJIFILM Corporation

Inventor： Daisuke HAMADA ,  Tatsuo ISHIKAWA

IPC: G03F7/075 ,  C08K3/36 ,  C08K3/22 ,  C08K3/28 ,  C08K9/02 ,  G03F7/00 ,  C08K7/18 ,  G03F7/027 ,  G03F7/028

Abstract: A photosensitive composition contains a black pigment, a resin, a polymerizable compound, and a photopolymerization initiator, in which the black pigment includes a coated particle which includes a metal-containing particle consisting of a nitride or oxynitride of one or more metals selected from the group consisting of zirconium, vanadium, and niobium, and a metal oxide coating layer consisting of a metal oxide, with which the metal-containing particle is coated.

公开(公告)号：US20240363275A1

公开(公告)日：2024-10-31

申请号：US18767210

申请日：2024-07-09

Applicant: FUJIFILM Corporation

Inventor： Tatsuo ISHIKAWA ,  Tetsushi MIYATA

IPC: H01F1/37 ,  H01Q1/36

CPC classification number: H01F1/37 ,  H01Q1/364

Abstract: The present invention provides a method for producing a composition, with which a composition capable of forming a magnetic material exhibiting high magnetic permeability and low magnetic loss, and having excellent storage stability can be produced; a magnetic material; and an electronic component. The method for producing a composition of the present invention includes a step of obtaining a composition by supplying, to a mixing device, magnetic particles, an organic solvent, and a rheology control agent to be stirred and mixed, in which a content of the magnetic particles is 80% to 95% by mass with respect to a total mass of components supplied to the mixing device, a stirring circumferential speed during the stirring and mixing is 2.0 to 5.0 m/sec, a viscosity of the composition, which is measured under a condition of a temperature of 25° C. and a shear rate of 0.1 sec−1, is 0.5 to 500 Pa·s, and a viscosity of the composition, which is measured under a condition of a temperature of 25° C. and a shear rate of 10 sec−1, is 0.01 to 100 Pa·s.

公开(公告)号：US20230420167A1

公开(公告)日：2023-12-28

申请号：US18462738

申请日：2023-09-07

Applicant: FUJIFILM Corporation

Inventor： Tetsushi MIYATA ,  Tatsuo ISHIKAWA

IPC: H01F1/37 ,  C09D171/02 ,  C09D135/02 ,  C09D163/00 ,  C09D4/00 ,  C09D161/06 ,  C09D7/62 ,  C09D7/63 ,  C09D7/20 ,  C09D7/40

CPC classification number: H01F1/37 ,  C09D171/02 ,  C09D135/02 ,  C09D163/00 ,  C09D4/00 ,  C09D161/06 ,  C09D7/62 ,  C09D7/63 ,  C09D7/20 ,  C09D7/69 ,  C08K2003/2265

Abstract: A first object of the present invention is to provide a composition that is capable of forming a cured substance having a high magnetic permeability and a low magnetic loss and has excellent hole filling suitability and excellent storage stability. A second object of the present invention is to provide a magnetic particle-containing cured substance formed of the composition. A third object of the present invention is to provide a magnetic particle-introduced substrate and an electronic material that contain the magnetic particle-containing cured substance.
The composition according to an embodiment of the present invention is a composition containing



magnetic particles and
an organic solvent,
in which the magnetic particles include magnetic particles X having a sphericity of 100 to 120,
the magnetic particles X include ferrite particles,
a content of magnetic particles that are included in the magnetic particles X and have an equivalent circle diameter of less than 11 μm is 15% to 70% by mass with respect to a total mass of the magnetic particles X, and
a volume average particle size of the magnetic particles X is 5 to 50 μm.

公开(公告)号：US20220332953A1

公开(公告)日：2022-10-20

申请号：US17848982

申请日：2022-06-24

Applicant: FUJIFILM Corporation

Inventor： Tatsuo ISHIKAWA

IPC: C09D5/00 ,  C08K3/08 ,  C08K3/22 ,  C09D7/65

Abstract: A first object of the present invention is to provide a composition that contains electromagnetic wave absorbing particles and has excellent dispersion stability. A second object of the present invention is to provide a film and a cured film that are formed using the aforementioned composition and a manufacturing method of a cured film. A third object of the present invention is to provide an electronic component including a cured film formed using the aforementioned composition.
The composition according to an aspect of the present invention contains electromagnetic wave absorbing particles, a dispersant, and a solvent.
The composition absorbs electromagnetic waves in a frequency band of 1 GHz or higher when formed into a film.