摘要:
There is provided a multilayer substrate comprising, at least, a single crystal MgO substrate, an iridium (Ir) film heteroepitaxially grown on the MgO substrate, a diamond film vapor-deposited on the Ir film, wherein crystallinity of the Ir film is that a full width at half maximum (FWHM) of a diffracted intensity peak in 2 θ=46.5° or 2θ=47.3° attributed to Ir (200) analyzed by X-ray diffraction method with a wavelength of λ=1.54 Å is 0.40° or less. Thereby, there is provided a multilayer substrate that is delamination-proof at the respective interfaces between the MgO substrate and the Ir film and between the Ir film and the diamond film, and, particularly, that has a single crystal diamond film of a large area as a continuous film.
摘要:
There is disclosed a method for producing a substrate for single crystal diamond growth, comprising at least a step of preliminarily subjecting a substrate before single crystal diamond growth to a bias treatment for forming a diamond nucleus thereon by a direct-current discharge in which an electrode in a substrate side is a cathode, and wherein in the treatment, at least, a temperature of the substrate from 40 sec after an initiation of the bias treatment to an end of the bias treatment is held in a range of 800° C.±60° C. There can be provided a method for producing a substrate for single crystal diamond growth, by which a single crystal diamond can be grown more certainly.
摘要:
A magnetic disk cartridge, which holds therein a magnetic disk with recording density and has a liner composed of polyethylene terephthalate fibers, is provided which achieves a good dust-removal effect by the liner without flawing the magnetic disk and without increasing the rotary torque of the magnetic disk. A magnetic layer of the magnetic disk is formed such that the magnetic layer contains diamond particles which have an average particle size satisfying a relationship “b−0.05≦a≦b+0.1” at 1% to 10% by weight with respect to the ferromagnetic material, where “a” represents the average particle size of the diamond particles in units of μm and “b” represents a thickness of the magnetic layer in units of μm. The fibers of the liner are selected from the fibers whose fiber diameter varies in its length direction.
摘要翻译:一种磁盘盒,其具有记录密度的磁盘并具有由聚对苯二甲酸乙二醇酯纤维组成的衬垫,其实现了衬垫的良好的除尘效果,而不会使磁盘发生瑕疵而不会增加旋转扭矩 磁盘。 形成磁盘的磁性层,使得磁性层含有平均粒径满足关系式“b-0.05 <= a <= b + 0.1”的金刚石颗粒,相对于 铁磁材料,其中“a”表示以单位为单位的金刚石颗粒的平均粒度,“b”表示磁性层以母体为单位的厚度。 衬垫的纤维选自其纤维直径在其长度方向上变化的纤维。
摘要:
A method comprising recording or reproducing a magnetic disc with a recording head or a reproducing head, the magnetic disc having a diameter of from 1.91 to 3.81 cm and comprising, in this order, a flexible support, a substantially nonmagnetic lower layer and a magnetic layer containing hexagonal ferrite magnetic powder and a binder, wherein relative speeds in all recording area of the magnetic disc are within a range of from 1.0 to 8.0 m/s when the recording or reproducing is conducted.
摘要:
The present invention provides smooth and adequate recording/reproducing on a recording medium employing a biodegradable material as a substrate material. The present invention relates to storing on a recording medium, information, structure, or the like indicating that a substrate is formed of a biodegradable material. When the present invention is applied to CD, CD-R, and CD-RW, identification information indicating a substrate formed of a biodegradable material is included in a free area of TOC data in a lead-in area shown in FIG. 4. An optical disc apparatus reads the identification information to identify whether or not a disc loaded into the apparatus has a substrate of a biodegradable material. When the loaded disc has a substrate of a biodegradable material, the optical disc apparatus: measures a temperature inside a drive; stops a recording/reproducing operation on the disc when the temperature approaches a glass transition temperature of a substrate material; and ejects the disc to outside of the apparatus.
摘要:
The present invention is a method for producing a diamond film on a base material by a vapor phase reaction at least with introducing a raw material gas, wherein PO(OCH3)3 gas, P(OCH3)3 gas, or B(OC2H5)3 gas is added to the raw material gas as a source of phosphorus or boron to be doped, and a diamond film doped with phosphorus or boron is deposited on the base material by a vapor phase reaction utilizing the mixed raw material gas. Thereby, there can be provided a method enabling easy, inexpensive and uniform production of a diamond film showing low electric resistivity with good reproducibility and few problems concerning handling such as bad influence on human bodies and explosiveness during the doping process.
摘要翻译:本发明是至少通过引入原料气体,其中PO(OCH 3)3气体,P(OCH 3)3气体或B(OC 2 H 5)3)的气相反应在基材上制备金刚石膜的方法 将气体作为待掺杂的磷或硼的原料气体添加,并且通过利用混合原料气体的气相反应将掺杂有磷或硼的金刚石膜沉积在基材上。 因此,可以提供一种能够容易,廉价和均匀地制备显示低电阻率的金刚石膜的方法,具有良好的再现性和在诸如对人体的不良影响和在掺杂过程中的爆炸性的处理方面的少量问题。
摘要:
Provided are a method of magnetic recording and reproducing capable of permitting high density recording on magnetic recording media even under the condition of high data transfer rates and yielding adequate recording and reproduction characteristics when an MR head is used in reproduction, and a magnetic recording medium capable of being used in this magnetic recording and reproducing method. The magnetic recording and reproducing method is a method for reproducing a signal magnetically recorded on a magnetic recording medium with a magnetoresistive (MR) head. The magnetic recording medium comprises a substantially nonmagnetic lower layer and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on at least one side of a nonmagnetic support, in which said hexagonal ferrite ferromagnetic powder has a mean plate diameter ranging from 15 to 40 nm and a mean plate thickness ranging from 4 to 15 nm, and said magnetic layer has a coercive force Hc ranging from 143.3 to 318.4 kA/m, and said signal magnetically recorded has a maximum recording frequency ranging from 10 to 80 MHz.
摘要:
A magnetic recording and reproducing method comprising recording and reproducing a signal with a magnetic head in a track width (A) of less than 5 &mgr;m on a magnetic recording medium comprising a support having provided thereon a magnetic layer containing at least a ferromagnetic powder, an abrasive and a binder, wherein the average longer size (B) of the abrasive particle(s) which are present on the magnetic layer surface is ⅓ or less of the track width (A).
摘要:
On a dielectric layer of SiN a reproduction layer, a non-magnetic layer of SiN and a recording layer of TbFeCo are formed to provide a magneto optical recording medium. The reproduction layer is formed of a first layer corresponding to a Gd layer, a second layer formed of GdFeCo and a third layer corresponding to a Gd layer. As such, the magneto optical recording medium, with the non-magnetic layer formed in contact with the reproduction layer, can prevent the non-magnetic layer from affecting the reproduction layer and thus prevent the reproduction layer from having a degraded characteristic.
摘要:
A magnetic head is configured of a core and a coil wound around the core and passing current through the coil in a variable direction allows the core to have an edge generating an alternating magnetic field Hex1 and another edge generating an alternating magnetic field Hex2. Alternating magnetic fields Hex1 and Hex2 are applied to the respective edges. Furthermore, a laser beam LB1 is directed such that its optical axis L01 matches the edge receiving the alternating magnetic field Hex1, and a laser beam LB2 is directed such that its optical axis L02 matches the edge receiving the alternating magnetic field Hex2. A first magneto-optical signal detected through the alternating magnetic field Hex1 and the laser beam LB1 and a second magneto-optical signal detected through the alternating magnetic field Hex2 and the laser beam LB2 are composited together. As such, an alternating magnetic field can be applied to a magneto-optical recording medium at a predetermined angle to an in-plane direction of the recording medium to accurately enlarge a magnetic domains for reproduction.