Class 428/813 - Substrate composition

Subclass of Class 428 - Stock material or miscellaneous articles
Definition: Subject matter in which the laminate has the chemical
No. of patents: 24
Last issue date: 05/08/2012

Number	Title	Issue Date
8173281	Ceramic sinter, magnetic head substrate using the same, magnetic head and recording medium drive unit A ceramic sintered body contains Al2O3 crystal grains, internal TiC crystal grains existing in the Al2O3 crystal grains and external TiC crystal grains other than the internal TiC crystal grains. The Al2O3 ...	05/08/2012
7414002	Aluminum oxide-titanium nitride sintered body, manufacturing method thereof, and magnetic head substrate, ultrasonic motor and dynamic pressure bearing using the same The present invention provides an aluminum oxide-titanium nitride sintered body having good resistance to electrostatic damage and small variation in volume resistivity. The aluminum oxide-titanium nitride sintered body is mainly composed of 65 to 85% by weight of a...	08/19/2008
7381670	Material for magnetic head slider, magnetic head slider, and method of producing material for magnetic head slider A material for a magnetic head slider according to the present invention is a magnetic head slider material comprised of a sintered body containing alumina and titanium carbide, in which an area percentage of an area of alumina crystal grains and titanium carbide cr...	06/03/2008
7300711	Magnetic tunnel junctions with high tunneling magnetoresistance using non-bcc magnetic materials Magnetic material, which is not normally bcc-structured under ambient conditions, is induced into becoming bcc as a result of its proximity to a suitable templating material, such as a bcc-structured underlayer that is in contact with the magnetic material. The magn...	11/27/2007
7294418	Magnetic film for magnetic head The magnetic film includes an FeCo layer, restrains erasing data by a magnetic field leaked from a magnetic pole, has high saturation magnetic flux density and soft magnetism and writes data with high recording density. The magnetic film for a magnetic head of the p...	11/13/2007
7220498	Tunnel magnetoresistance element By varying only the thickness of a known material having superior magnetic characteristics to increase spin polarization without changing the chemical composition, a tunnel magnetoresistive element capable of producing a larger magnetoresistive effect is provided. T...	05/22/2007
7094480	Magnetic field sensor using magnetoresistance and method for making same The invention relates to magnetic field sensors in which magnetoresistance is used as the physical phenomenon for detecting and measuring the magnetic field. It consists in producing a stack comprising a first ferromagnetic layer (101), an insulating layer (	08/22/2006
7045224	Magnetic detecting element having antiferromagnetic film having predetermined space in track width direction and method for manufacturing the same The present invention provides a magnetic detecting element including a pinned magnetic layer and a first antiferromagnetic layer which constitutes an exchange coupling film and the structures of which are optimized for properly pinning magnetization of the pinned m...	05/16/2006
7029771	Magnetic sensor having free layer additionally provided with magnetic anisotropy by shape anisotropy An intermediate region is formed at a central portion of an element in a track width direction, and an antiferromagnetic layer is not provided at the intermediate region. Accordingly, a sense current can be prevented from being shunted to the intermediate region, an...	04/18/2006
6967055	Thin-film magnetic head and method of forming the same In a thin-film magnetic head having a multilayered film developing a magnetoresistive effect, which is present between an upper shielding layer and a lower shielding layer both formed above an AlTiC substrate, a recess for defining the lower shielding layer is forme...	11/22/2005
6638596	Thin film magnetic head using soft magnetic film having soft magnetic characteristics of high resistivity, low coercive force, and high saturation magnetic flux density A soft magnetic film of the invention is to improve a resistivity .rho. while maintaining a coercive force Hc and a saturation magnetic flux density Ms in good states by adding an element X (X is one or more kinds of elements selected from O, C, N, and S)...	10/28/2003
5246893	Ceramic sintered body and process for preparation thereof 1. Disclosed is a ceramic sintered body comprising, as main components, (a) 60 to 80% by weight of alumina and (b) 20 to 40% by weight of titanium carbide or a combination of titanium carbide and titanium oxide, wherein said ceramic sintered body further ...	09/21/1993
5242865	Non-magnetic substrate of magnetic head A non-magnetic substrate for use in a magnetic head, consists of the basic composition consisting of CoO and NiO or NiO, and (a) from 0.1 to 7% by weight of ZrO2 and HfO2 based on 100% of the basic composition, or (b) from 0.1 to 7% ...	09/07/1993
5231555	Magnetic head comprising a laminated magnetic layer structure between non magnetic rock salt structure oxide substrates A non-magnetic substrate used for a magnetic head comprising a pair of non-magnetic substrates, and a magnetic layer structure sandwiched between the pair of non-magnetic substrates. The magnetic layer structure is comprised, of alternately laminated magn...	07/27/1993
5057374	MnO/NiO-based nonmagnetic substrate material Nonmagnetic substrate material containing 67 to about 89.9 mol % of MnO, 10 to 33 mol % of NiO, and at least 0.1 mol % but not more than 10 mol % of a material selected from the group of CaO, ZrO2, V2 O5, Y2 O	10/15/1991
5047296	Composite magnetic material and its production process The composite material comprises an alternation of amorphous magnetic material films based on cobalt, niobium and zirconium and electrically insulating material films (4), each magnetic film being formed from several blocks (6) separated from one another ...	09/10/1991
4863557	Pattern forming process and thin-film magnetic head formed by said process Disclosed herein are a pattern forming process, particularly the one by lithography for fine fabrication, and a thin-film magnetic head formed by said process. The present invention provides a process for accurately fabricating a substrate having a steppe...	09/05/1989
4777074	Grooved magnetic substrates and method for producing the same A grooved magnetic substrate including an alumina film layer having a Knoop hardness of 600 kg/mm2 to 1200 kg/mm2 charged in at least one groove formed in a surface of a magnetic substrate. The magnetic substrate may be Mn-Zn or NiZn...	10/11/1988
4681813	Ceramic substrate for a thin layer magnetic head A thin layer magnetic head comprising a ceramic substrate consisting essentially of 100 parts by weight of a ceramic material and 0.05 to 5 parts by weight of at least one compound from the group consisting of silicon oxide and iron oxide....	07/21/1987
4650726	Ceramic substrate of Na₂ O and Ta₂ O₅ for thin film magnetic head A ceramic composition having the general formula: wherein the ratio of x/y is at least 0.85 less than 1.00, the composition having a coefficient of thermal expansion which matches that of a metal thin film type magnetic recording head so that the composition c...	03/17/1987
4639400	Ceramic substrate of Na₂ O and Nb₂ O₅ for magnetic metal thin film A ceramic composition particularly useful for use in thin film magnetic heads, the composition having the general formula: wherein the ratio x/y is at least 0.74 but less than 1.00, the composition having a coefficient of thermal expansion closely matching tha...	01/27/1987
4636420	Grooved magnetic substrates and method for producing the same A grooved magnetic substrate for thin film magnetic heads having grooves filled with glass having substantially no pores therein and an interdiffusion layer between substrate and glass of 5 microns or less. The substrate is produced by hot-filling the gro...	01/13/1987
4608293	Composite substrate for a thin-film magnetic head A composite substrate for a thin-film magnetic head comprises a substrate material, and an insulating oxide film formed thereon, and defining a smooth and stress-free surface having a surface roughness not greater than 50 Å. A film of a magnetic material...	08/26/1986
4540638	Non-magnetic substrate material A thin film magnetic material assembly for a magnetic head which has a non-magnetic substrate material and a magnetic metallic film vapor deposited thereon. The substrate material has a thermal coefficient of expansion approximating that of the magnetic m...	09/10/1985

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Class 428/813 - Substrate composition