Abstract: A substrate is made of a crystallized glass having translucency and an average linear thermal expansion coefficient of ?5×10?7/° C. at 30 to 500° C. The substrate has a first surface (working surface) of a smooth surface having a surface roughness Rmax of less than 0.5 ?m, and a second surface (non-working surface) of a rough surface having a surface roughness Rmax of 4 ?m. A light shielding layer consisting of a light shielding film and an antioxidant film is formed on the second surface of the substrate through sputtering.

Abstract: A recording and reproducing apparatus includes: a recording section for recording an information signal in a magnetic recording medium including a magnetic layer including hexagonal ferrite; a reproducing section for reproducing the information signal recorded in the magnetic recording medium, the reproducing section including: a reproducing head for reading the information signal from the magnetic recording medium; an equalizer for equalizing the information signal read from the magnetic recording medium, wherein a partial response of the information signal after equalization by the equalizer satisfies a condition that 0.4?a<3.0, ?0.6?b<2.0, ?2.0<c??0.2, ?3.0<d??0.4, and ?1.0<e?0.0. A corresponding reproducing method, a corresponding reproducing apparatus, and the magnetic recording medium are also disclosed.

Abstract: A recording and reproducing apparatus includes: a recording section for recording an information signal in a magnetic recording medium in which a magnetic layer containing hexagonal ferrite is formed; and a reproducing section for reproducing the information signal recorded in the magnetic recording medium, the reproducing section including: a reproducing head for reading the information signal from the magnetic recording medium; and an equalizer for equalizing the information signal read from the magnetic recording medium, wherein in the equalized information signal, coefficients a, b, c, d of PR(1, a, b, c, d) meet conditions that 0.1?a<2.0, ?0.9?b<?0.0, ?2.0<c??0.3, and ?1.0<d??0.1. A corresponding reproducing method, a corresponding reproducing apparatus, and the magnetic recording medium are also disclosed.

Abstract: Provided is a magnetic recording medium capable of achieving high reproduction output in a short wavelength region. The magnetic recording medium comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support. The magnetic layer has a squareness ranging from 0.6 to 1.0 in a perpendicular direction, and the magnetic recording medium is employed for recording a magnetic signal on the medium in a longitudinal direction at a linear recording density of equal to or greater than 300 Kbpi using a recording head with a gap length of equal to or less than 0.3 micrometer, and reproducing the magnetic signal using a magnetoresistive head with a shield spacing of equal to or less than 0.2 micrometer.

Abstract: Provided is a magnetic recording medium capable of achieving optimum error rate characteristics in the high-density region. The magnetic recording medium is employed for magnetically recording signals and reproducing the signals with a reproduction head with a track width equal to or less than 6 ?m. The magnetic recording medium comprises a magnetic layer on a nonmagnetic support, and the thickness variation of the magnetic layer satisfies the following equation (1): (1)m/Tw?10 [wherein m denotes magnetic layer thickness variation (%) and Tw denotes reproduction head track width (?m)].

Abstract: The reproducing method and apparatus, and recording and reproducing apparatus equalize and demodulate an information signal under a condition that coefficient terms (1, a1, a2, . . . , am (m: 2n or 2n+1; n, an integer not less than 1)) of a partial response satisfy any of equations (1) and (2) in a case that ? comprises a waveform of ?>0 and indicates an asymmetry of an isolated reversion producing waveform reproduced from the magnetic recording medium; and under a condition that the coefficient items of the partial response satisfy any of equations (3) and (4) in a case that the ? comprises a waveform of ?<0, wherein the equations (1) to (4) are: in a case of PR (1, a1, a2, . . . , a2n), 1 + ? ? k = 1 n - 1 ? a k ? < ? ? k = n + 1 2 ? n ? a k ? ( 1 ) in a case of PR (1, a1, a2, . . . , a2n+1), 1 + ? ? k = 1 n ? a k ? < ? ? k = n + 1 2 ? n + 1 ? a k ? ( 2 ) in a case of PR (1, a1, a2, . . .

Abstract: A substrate is made of a crystallized glass having translucency and an average linear thermal expansion coefficient of ?5×10?7/° C. at 30 to 500° C. The substrate has a first surface (working surface) of a smooth surface having a surface roughness Rmax of less than 0.5 ?m, and a second surface (non-working surface) of a rough surface having a surface roughness Rmax of 4 ?m. A light shielding layer consisting of a light shielding film and an antioxidant film is formed on the second surface of the substrate through sputtering.

Abstract: Novel amine compounds having a nitrogen-containing cyclic structure and a hydrating group such as a hydroxy, ether, ester, carbonyl, carbonate group or lactone ring are useful for use in resist compositions for preventing a resist film from thinning and also for enhancing the resolution and focus margin of resist.

Abstract: Provision of a highly reliable magnetic recording medium with able to record further high density recording, usable advantageously as a magnetic tape for recording computer data, and having a further improved SNR, and a method for reproducing signals magnetically recorded on a magnetic recording medium to reproduce more desirably magnetic recording such as computer data with high density recording or the like. The magnetic recording medium having, on either side of a flexible nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder, and a magnetic layer containing a ferromagnetic powder and a binder, having a thickness in the range of from 0.2 to 0.6 &mgr;m in this order, where a laminated head is used for reproduction. The method for reproducing signals magnetically recorded medium having, on either side of a flexible nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder, and a magnetic layer, with a thickness ranging from 0.2 to 0.

Abstract: Onium salts of arylsulfonyloxynaphthalenesulfonate anions with iodonium or sulfonium cations are novel. A chemically amplified resist composition comprising the onium salt as a photoacid generator is suited for microfabrication, especially by deep UV lithography because of many advantages including improved resolution, improved focal latitude, minimized line width variation or shape degradation even on long-term PED, minimized debris after coating, development and peeling, and improved pattern profile after development.

Abstract: A top plate is provided for use in a cooking device having an induction heater alone or an infrared heater in addition, which comprises a transparent crystallized glass plate, a light-shading film on a bottom surface of the glass plate and an ornamental film formed on the top surface of the glass plate. The light-shading film is a porous layer of inorganic pigment powder dispersed in glass matrix. The light-shading film has small apertures at a portion corresponding to the infrared heater. Alternatively, it has a decreased thickness at the portion. In another alternative, a luster film is used in place of the inorganic pigment layer at the portion corresponding to the infrared heater.

Abstract: A top plate is provided for use in a cooking device having an induction heater alone or an infrared heater in addition, which comprises a transparent crystallized glass plate, a light-shading film on a bottom surface of the glass plate and an ornamental film formed on the top surface of the glass plate. The light-shading film is a porous layer of inorganic pigment powder dispersed in glass matrix. The light-shading film has small apertures at a portion corresponding to the infrared heater. Alternatively, it has a decreased thickness at the portion. In another alternative, a luster film is used in place of the inorganic pigment layer at the portion corresponding to the infrared heater.

Abstract: Onium salts of the formula (1) are novel. R1 is C1-10 alkyl or C6-14 aryl, R2 is H or C1-6 alkyl, p is an integer of 1 to 5, q is an integer of 0 to 4, p+q=5, R3 is C1-10 alkyl or C6-14 aryl, M is a sulfur or iodine atom, and “a” is equal to 3 or 2. A chemical amplification type resist composition comprising the onium salt as a photoacid generator is suited for microfabrication, especially by deep UV lithography because of many advantages including improved resolution, minimized line width variation or shape degradation even on long-term PED, minimized defect after coating, development and stripping, and improved pattern profile after development.

Abstract: The magnetic tape processing method and apparatus allow at least one of a laser beam or laser beams in a visible region and a laser beam or laser beams in an ultraviolet region to be incident on a backing layer of a magnetic tape while transporting the magnetic tape in a lengthwise direction of the magnetic tape and process the backing layer by means of the laser beam or laser beams to form recesses on the backing layer. The processed magnetic tape is composed of a base layer, a magnetic layer formed on one surface of the base layer and the backing layer formed on another surface of the base layer and having recesses which are formed by processing the backing layer by means of the laser beam or laser beams.

Abstract: Novel amine compounds having a nitrogen-containing cyclic structure and a hydrating group such as a hydroxy, ether, ester, carbonyl, carbonate group or lactone ring are useful for use in resist compositions for preventing a resist film from thinning and also for enhancing the resolution and focus margin of resist.

Abstract: Onium salts of arylsulfonyloxynaphthalenesulfonate anions with iodonium or sulfonium cations are novel. A chemically amplified resist composition comprising the onium salt as a photoacid generator is suited for microfabrication, especially by deep UV lithography because of many advantages including improved resolution, improved focal latitude, minimized line width variation or shape degradation even on long-term PED, minimized debris after coating, development and peeling, and improved pattern profile after development.

Abstract: A chemical amplification type resist composition contains as a photoacid generator a sulfonyldiazomethane compound of the formula (1): wherein R1 is C1-10 alkyl or C6-14 aryl, R2 is C1-6 alkyl, G is SO2 or CO, R3 is C1-10 alkyl or C6-14 aryl, p is an integer of 0 to 4, q is an integer of 1 to 5, 1≦p+q≦5, n is 1 or 2, m is 0 or 1, and n+m=2. The composition is suited for microfabrication, especially by deep UV lithography because of many advantages including improved resolution, minimized line width variation or shape degradation even on long-term PED, minimized debris after coating, development and peeling, and improved pattern profile after development.

Abstract: A chemically amplified positive resist composition comprising at least one basic compound of the following general formula (1) or (2): wherein R1, R2, R3, R7, and R8 are independently normal, branched or cyclic alkylene groups having 1 to 20 carbon atoms, R4, R5, R6, R9, and R10 are independently hydrogen, alkyl groups having 1 to 20 carbon atoms or amino groups, R4 and R5, R5 and R6, R4 and R6, or R8, R5 and R5, and R9 and R10, taken together, may form a ring, letters k, m and n are integers of 0 to 20, with the proviso that hydrogen is excluded from R4, R5, R6, R9 and R10 when k, m or n is equal to 0. The resist compositions of the present invention are effective for preventing resist films from thinning and for increasing the focus margin of an isolated pattern.

Abstract: Di- or triphenyl monoterpene hydrocarbon derivatives of formula (1) are novel. ##STR1## X is a di- or trivalent monoterpene hydrocarbon group, R.sup.1 to R.sup.3 are hydrogen or an alkyl, alkoxy, alkoxyalkyl, alkenyl or aryl group, R.sup.4 is hydrogen or an acid labile group, at least one R.sup.4 being an acid labile group, letter n is an integer of 1-5, j, k and m are integers of 0-4, n+j+k+m=5, and p is 2 or 3. When used as a dissolution rate regulator, the compound of formula (1) exerts remarkably enhanced dissolution inhibitory effect and minimized light absorption in the deep-UV region. A chemically amplified positive resist composition having the compound of formula (1) blended therein is highly sensitive to actinic radiation such as deep-UV radiation, electron beam and X-ray, especially KrF excimer laser light, and has improved sensitivity, resolution and plasma etching resistance.

Abstract: In a chemically amplified positive resist composition comprising an organic solvent, an acid labile group-protected resin and a photoacid generator, a compound having a weight average molecular weight of 100-1,000 and at least two phenolic hydroxyl groups in a molecule wherein the hydrogen atom of the phenolic hydroxyl group is partially replaced by an acid labile group in an overall average proportion of 10-80% is blended as a dissolution controller. The resist composition is highly sensitive to actinic radiation, has improved sensitivity and resolution, and is suitable for use in a fine patterning technique and commercially acceptable.