公开(公告)号：US20150380037A1

公开(公告)日：2015-12-31

申请号：US14754918

申请日：2015-06-30

Applicant: FUJIFILM CORPORATION

Inventor： Yoshinori TAMADA ,  Masahide SATO ,  Kazufumi OMURA

IPC: G11B5/708

CPC classification number: G11B5/708 ,  G11B5/7013

Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support, and a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein the magnetic layer further comprises carbon black, and a state in which the carbon black is present, as observed in a reflection electron image of a surface of the magnetic layer obtained by a scanning electron microscope, satisfies condition 1 and condition 2 below: condition 1: a number of carbon black particles with a particle size of greater than or equal to 140 nm is greater than or equal to 30 per 1,000 μm2 of area; and condition 2: a number of carbon black particles with a particle size of greater than or equal to 220 nm is less than or equal to 10 per 1,000 μm2 of area.

Abstract translation: 本发明的一个方面涉及一种磁记录介质，其包括在非磁性载体上包含非磁性粉末和粘合剂的非磁性层，以及在非磁性层上包含铁磁粉末和粘合剂的磁性层，其中所述磁性层还包含炭黑 ，并且如通过扫描型电子显微镜获得的磁性层的反射电子图像中观察到的存在炭黑的状态满足以下条件1和条件2：条件1：炭黑粒子的数量 粒径大于或等于140nm的面积大于或等于30; 条件2：粒径大于或等于220nm的数量的炭黑颗粒小于或等于每1,000平方米面积的10。

公开(公告)号：US20150010466A1

公开(公告)日：2015-01-08

申请号：US14324857

申请日：2014-07-07

Applicant: FUJIFILM Corporation

Inventor： Yasushi HATTORI ,  Yoshinori TAMADA

IPC: C01G49/02 ,  H01F1/01

CPC classification number: H01F1/01 ,  C01G49/0036 ,  C01P2004/64 ,  C01P2006/42 ,  H01F1/348 ,  H01F1/36

Abstract: The method of manufacturing hexagonal ferrite magnetic particles comprises applying, in a water-based solution, an adhering matter comprising a glass component and an alkaline earth metal to iron oxide particles to which a surfactant adheres, and calcining the iron oxide particles to which the adhering matter adheres to obtain a calcined product in which a main component that is detected by X-ray diffraction analysis is hexagonal ferrite.

Abstract translation: 制造六方晶系铁氧体磁性颗粒的方法包括在水性溶液中将包含玻璃组分和碱土金属的粘附物施加到表面活性剂附着的氧化铁颗粒上，并煅烧氧化铁颗粒， 物质粘附以获得其中通过X射线衍射分析检测的主要成分是六方铁素体的煅烧产物。

公开(公告)号：US20220109096A1

公开(公告)日：2022-04-07

申请号：US17551206

申请日：2021-12-15

Applicant: FUJIFILM Corporation

Inventor： Yoshinori TAMADA

IPC: H01L41/047 ,  H01L41/193 ,  H01L41/053

Abstract: Provided is a piezoelectric film capable of realizing an electroacoustic conversion film or the like in which the durability is high and a sufficient sound pressure with respect to an input operating voltage is obtained. The piezoelectric film is a piezoelectric film including a polymer-based piezoelectric composite material which contains piezoelectric particles in a matrix containing a polymer material, and electrode layers which are provided on both surfaces of the polymer-based piezoelectric composite material, in which in a case where a cross section of the piezoelectric film in a thickness direction is observed with a scanning electron microscope, the polymer-based piezoelectric composite material is divided into two equal regions in the thickness direction, and void volumes of the two regions are measured, a ratio of the void volume obtained by dividing the void volume of the region with a larger void volume by the void volume of the region with a smaller void volume is 1.2 or greater.

公开(公告)号：US20220384706A1

公开(公告)日：2022-12-01

申请号：US17882174

申请日：2022-08-05

Applicant: FUJIFILM Corporation

Inventor： Yoshinori TAMADA

IPC: H01L41/047 ,  H01L41/193

Abstract: An object of the present invention is to provide a piezoelectric film capable of realizing an electroacoustic conversion film or the like in which the durability is high and a sufficient sound pressure with respect to an input operating voltage is obtained. The object is achieved by providing a piezoelectric film including a polymer-based piezoelectric composite material which contains piezoelectric particles in a matrix containing a polymer material, and electrode layers which are provided on both surfaces of the polymer-based piezoelectric composite material, in which in a case where a cross section of the film in a thickness direction is observed with a scanning electron microscope, the polymer-based piezoelectric composite material is divided into ten equal regions in the thickness direction, area ratios of the piezoelectric particles in two most distant regions are measured, and the area ratio of the piezoelectric particles in the region with a lower area ratio is set as 1, the area ratio of the piezoelectric particles in the region with a higher area ratio is 1.2 or greater.

公开(公告)号：US20150010698A1

公开(公告)日：2015-01-08

申请号：US14324852

申请日：2014-07-07

Applicant: FUJIFILM CORPORATION

Inventor： Yasushi HATTORI ,  Yoshinori TAMADA

IPC: G11B5/65 ,  H01F1/03

CPC classification number: G11B5/653 ,  G11B5/70678 ,  H01F1/11

Abstract: The method of manufacturing hexagonal ferrite magnetic particles comprises applying an adhering matter comprising a glass component and an alkaline earth metal to hexagonal ferrite magnetic particles, and subjecting the hexagonal ferrite magnetic particles to which the adhering matter has been applied to a heat treatment.

Abstract translation: 制造六方晶系铁氧体磁性颗粒的方法包括将包含玻璃组分和碱土金属的粘合物施加到六方晶系铁氧体磁性颗粒上，并对已经施加粘附物质的六方晶系铁氧体磁性颗粒进行热处理。

公开(公告)号：US20140255846A1

公开(公告)日：2014-09-11

申请号：US14282141

申请日：2014-05-20

Applicant: FUJIFILM CORPORATION

Inventor： Kimi IKEDA ,  Yoshinori TAMADA ,  Makoto KUBOTA

IPC: G03F7/038

CPC classification number: G03F7/0387 ,  G02B13/006 ,  G02B13/0085 ,  G03F7/0047 ,  G03F7/029 ,  G03F7/031 ,  G03F7/033 ,  G03F7/035 ,  G03F7/038 ,  H01L27/14618 ,  H01L2224/13 ,  Y10T428/24802

Abstract: A polymerizable composition contains (A) a polymerization initiator that is an acetophenone-based compound or an acylphosphine oxide-based compound, (B) a polymerizable compound, (C) at least either a tungsten compound or a metal boride, and (D) an alkali-soluble binder.

Abstract translation: 聚合性组合物含有（A）作为苯乙酮类化合物或酰基氧化膦系化合物的聚合引发剂，（B）聚合性化合物，（C）钨化合物或金属硼化物中的至少一种，（D） 碱溶性粘合剂。