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    • 1. 发明授权
    • Magnetic head
    • 磁头
    • US6120919A
    • 2000-09-19
    • US114946
    • 1998-07-14
    • Satoshi ShigematsuTakao ImagawaKoichi NishiokaHiroshi KamioKatsuhisa Usami
    • Satoshi ShigematsuTakao ImagawaKoichi NishiokaHiroshi KamioKatsuhisa Usami
    • G11B5/012G11B5/39G11B5/66
    • B82Y25/00B82Y10/00G11B5/012G11B5/3903G11B2005/3996Y10S428/90Y10T428/1121Y10T428/115Y10T428/1193
    • Magnetoresistive and spin valve heads have a layered structure. Common to each of the layered structures of these heads is the combination of a soft-magnetic layer of essentially NiFe near a spacer layer of essentially Ta, which is used for insuring (111) crystal orientation of the NiFe layer. An isolate layer is interposed between the spacer layer and the soft-magnetic layer to prevent a diffusion boundary from being created at the interface of these layers which tends to degrade the soft-magnetic property of the NiFe layer, especially when the thickness of the soft-magnetic layer is 10 and nm or less. The isolate layer is one of a composition in which the principal component is a magnetic element that is not solid soluble with Ta, a composition in which the principal component is a non-magnetic element that is not solid soluble with Ni and Fe, a composition in which the principal component is at least one of the elements of Co, Fe, Ti, V, Zr, Nb, Mo, Hf, W, Tc, Ru, Rh, Pd, Ag, Re, Os, Ir, Pt and Au; or a composition in which the principal component is of Co.sub.(100-x) Fe.sub.(x), where 20.gtoreq.X>O. The isolate layer has a structure that is amorphous, an fcc structure.
    • 磁阻和旋转阀头具有分层结构。 这些磁头的每个层状结构的共同之处在于用于确保NiFe层的(111)晶体取向的基本上Ta的间隔层附近的基本上NiFe的软磁性层的组合。 在间隔层和软磁性层之间插入隔离层,以防止在这些层的界面处产生扩散边界,这倾向于降低NiFe层的软磁特性,特别是当软质的厚度 磁性层为10nm以下。 隔离层是其中主要成分是与Ta不固溶的磁性元素的组合物之一,其中主要成分是不与Ni和Fe固溶的非磁性元素的组成,组成 其中主要成分是Co,Fe,Ti,V,Zr,Nb,Mo,Hf,W,Tc,Ru,Rh,Pd,Ag,Re,Os,Ir,Pt和Au中的至少一种元素 ; 或其中主成分为Co(100-x)Fe(x)的组合物,其中20> = X> O。 隔离层具有无定形,fcc结构的结构。
    • 2. 发明授权
    • Magnetic head
    • 磁头
    • US06319622B1
    • 2001-11-20
    • US09633170
    • 2000-08-04
    • Satoshi ShigematsuTakao ImagawaKoichi NishiokaHiroshi KamioKatsuhisa Usami
    • Satoshi ShigematsuTakao ImagawaKoichi NishiokaHiroshi KamioKatsuhisa Usami
    • G11B566
    • B82Y25/00B82Y10/00G11B5/012G11B5/3903G11B2005/3996Y10S428/90Y10T428/1121Y10T428/115Y10T428/1193
    • Magnetoresistive and spin valve heads have a layered structure. Common to each of the layered structures of these heads is the combination of a soft-magnetic layer of essentially NiFe near a spacer layer of essentially Ta, which is used for insuring (111) crystal orientation of the NiFe layer. An isolate layer is interposed between the spacer layer and the soft-magnetic layer to prevent a diffusion boundary from being created at the interface of these layers which tends to degrade the soft-magnetic property of the NiFe layer, especially when the thickness of the soft-magnetic layer is 10 and nm or less. The isolate layer is one of a composition in which the principal component is a magnetic element that is not solid soluble with Ta, a composition in which the principal component is a non-magnetic element that is not solid soluble with Ni and Fe, a composition in which the principal component is at least one of the elements of Co, Fe, Ti, V, Zr, Nb, Mo, Hf, W, Tc, Ru, Rh, Pd, Ag, Re, Os, Ir, Pt and Au; or a composition in which the principal component is of Co(100−X)Fe(X), where 20≧X>O. The isolate layer has a structure that is amorphous, an fcc structure.
    • 磁阻和旋转阀头具有分层结构。 这些磁头的每个层状结构的共同之处在于用于确保NiFe层的(111)晶体取向的基本上Ta的间隔层附近的基本上NiFe的软磁性层的组合。 在间隔层和软磁性层之间插入隔离层,以防止在这些层的界面处产生扩散边界,这倾向于降低NiFe层的软磁特性,特别是当软质的厚度 磁性层为10nm以下。 隔离层是其中主要成分是与Ta不固溶的磁性元素的组合物之一,其中主要成分是不与Ni和Fe固溶的非磁性元素的组成,组成 其中主要成分是Co,Fe,Ti,V,Zr,Nb,Mo,Hf,W,Tc,Ru,Rh,Pd,Ag,Re,Os,Ir,Pt和Au中的至少一种元素 ; 或其中主成分为Co(100-X)Fe(X)的组合物,其中20> = X> O。 隔离层具有无定形,fcc结构的结构。
    • 3. 发明授权
    • Charged-particle analyzer
    • 充电粒子分析仪
    • US4135088A
    • 1979-01-16
    • US810970
    • 1977-06-28
    • Isao IshikawaMichiyasu ItohKatsuhisa Usami
    • Isao IshikawaMichiyasu ItohKatsuhisa Usami
    • G01N23/227G01N23/225G05B7/02H01J49/44H01J49/48H01J39/00
    • G01N23/225H01J49/482H01J2237/05
    • A charged-particle beam correction arrangement for a charged-particle analyzer having deflecting electrodes which focus charged particles emitted from a sample onto a center axis, an extension thereof, or onto an identical circumference with its center on the axis, a slit which is disposed at the focus point, and an energy analyzer whose object point lies at the focus point. The charged-particle beam correction arrangement is disposed axially symmetrically in the vicinity of the path of the charged particles between the sample and the slit to correct a deformation in the focusing of the charged-particle beam. BACKGROUND OF THE INVENTIONThe present invention relates to a charged-particle analyzer.For the analysis of a feeble electron beam of low energy, such as Auger electrons and photoelectrons in the surface analysis, it is important to efficiently utilize the electrons emitted from a sample. Accordingly, it is necessary that the accepted solid angle (= the solid angle of electron rays entering an analyzing system/the entire solid angle of electron rays emitted from a sample) be wide.As an optimum structure based on such requirement, an analyzing equipment shown in FIG. 1 has been proposed (Japanese Patent Application No. 12283/76). The feature of this equipment is that a deflecting system consisting of two inner and outer electrodes is arranged axially symmetrically around a sample and that signals emitted from the sample and entering the deflecting system are caused to depict a greatly curved track, whereupon they are focused on the center axis of the equipment or a circumference with its center on the axis again. Further, at a stage succeeding the deflecting system, an analyzing system is arranged in such electrooptical relation that the point of the above focusing is considered as the emission point of the signals. Thus, an energy analysis of photo-electrons, Auger electrons, etc. is carried out.FIG. 1 is a constructional view showing the prior art equipment described above including an electron gun. An electron beam 2 produced from the electron gun is focused by a focusing lens 3, and irradiates a sample 4. Charged particles 5, such as Auger electrons, are emitted from the irradiated point P of the sample 4 in substantially the COS-Law spacial distribution. Among the charged particles, rays of electrons are surrounded by two cones whose vertexes are the point P and whose half vertical angles are .theta. + a and .theta. - a, which rays enter between deflecting electrodes 6 and 7. The deflecting electrodes 6 and 7 are disposed axially symmetrically and are L-shaped in section so as to form a double electrode system.Within the deflecting electrode system, the rays of electrons depict greatly curved tracks owing to a deflecting electric field. Further, the rays of electrons have the tracks corrected by an auxiliary electrode 8 and are converged in the first order of the angle a onto a slit 9 situated at a stage succeeding the auxiliary electrode 8. After passing through the slit 9, the rays travel so as to cross on the axis of the equipment. They are subjected then to the energy analysis by a cylindrical mirror type analyzer 10 arranged after the slit 9 with only electrons having certain specific energy being converged onto a detection slit 9' which is placed on the axis, signals being detected by a detector 11 which is disposed behind the detecting slit 9'.The energy analysis of the charged particles 5 emitted from the sample becomes possible in such a way that voltages to be applied to the deflecting electrodes 6, 7, the auxiliary electrode 8, and the electrode of the cylindrical mirror type analyzer 10 are appropriately selected with divider resistances 12, 13 and 14 connected to a power source 20 and then scanned at a fixed ratio.When it is desired to have a high sensitivity of analysis utilizing the aforedescribed analyzing system, the signal obtained from the sample must of course be received at the widest possible accepted solid angle as stated above. Additionally, the loss of signal between the deflecting system and the slit must be confined to a minimum. To this end, it is necessary that the rays of electrons at the time when they pass through the slit 9 have the best possible circularity so as to reduce the amount to which the rays are intercepted by the end face of the slit 9.In this respect, a glass plate coated with a phosphor was placed at the position of the slit 9 in the aforedescribed equipment, and the shape of the rays of electrons focused on this point was directly observed. It was determined that the rays of electrons were not truly circular, but rather often presented a ring shape deformed in one direction or a shape having a long tail at a certain part.The cause therefor was studied, and has been revealed to be a kind of electrooptical astigmatism attributed to the fact that the electrodes were not fixed coaxially or that the parallelism of each electrode was not maintained. Therefore, in constructing the equipment, careful attention was pair to the finish precision of the electrodes and the assembling was carefully executed. While considerable improvements were thus effected, it has been determined that a satisfactory result has not been attained.SUMMARY OF THE INVENTIONAn object of the present invention is to provide an improved charged-particle analyzer.Another object of the present invention is to provide a charged-particle analyzer which makes it possible to set a wide accepted solid angle for signals and to attach a sample of large area without greatly decreasing the accepted solid angle.These and other objects are attained by a charged-particle analyzer having an irradiation device for irradiating a sample with a primary beam, a deflecting electrode system for focusing charged particles emitted from the sample onto the center axis of the primary beam or an extension thereof or onto an identical circumference with its center located on the axis or the extension, a slit which is disposed at the focus point of the charged particles, an energy analyzing system whose object point lies at the focus point, a detector for detecting the charged particles analyzed by the energy analyzing system, and a charged-particle beam correction arrangement disposed axially symmetrically in the vicinity of the path of the charged particles between the sample and the slit.