Abstract: A pyroelectric infrared detector includes a substrate having a recess. A pyroelectric portion substantially aligns with the recess. A resin film is located between the substrate and the pyroelectric portion. The recess faces the resin film. First and second electrodes are connected to first and second surfaces of the pyroelectric portion respectively. The pyroelectric portion may include a pyroelectric film of Pb.sub.x La.sub.y Ti.sub.z Zr.sub.w O.sub.3 where atomic fractions "w", "x", "y", and "z" satisfy one of following conditions a), b), and c):a) 0.7.ltoreq.x.ltoreq.1, x+y=1, 0.925.ltoreq.z.ltoreq.1, w=0b) x=1, y=0, 0.45.ltoreq.z<1, z+w=1c) 0.75.ltoreq.x<1, x+y=1, 0.5.ltoreq.

Abstract: A laminated thin film capacitor having a substrate, at least two electrode layers, at least one dielectric layer and a pair of external electrode which are placed on respective side walls of the capacitor, wherein the metal electrode layer and the dielectric layers are laminated alternately on the substrate, and every other metal electrode layers are exposed on each of side walls of the capacitor, which capacitor is excellent in dielectric properties such as a high capacity per unit volume.

Abstract: A pyroelectric infrared detector includes a substrate having a recess. A pyroelectric portion substantially aligns with the recess. A resin film is located between the substrate and the pyroelectric portion. The recess faces the resin film. First and second electrodes are connected to first and second surfaces of the pyroelectric portion respectively. The pyroelectric portion may include a pyroelectric film of Pb.sub.x La.sub.y Ti.sub.z Zr.sub.w O.sub.3 where atomic fractions "w", "x", "y", and "z" satisfy one of following conditions a), b), and c):a) 0.7.ltoreq.x.ltoreq.1, x+y=1, 0.925.ltoreq.z.ltoreq.1, w=0b) x=1, y=0, 0.45.ltoreq.z<1, z+w=1c) 0.75.ltoreq.x<1, x+y=1, 0.5.ltoreq.z<1, z+w=1.

Abstract: A NaCl oxide thin layer oriented to (100) face or a spinel oxide thin layer oriented to (100) face, a perovskite dielectric thin layer oriented to (100) face and a metal electrode are sequentially laminated on a metal electrode, thus providing a thin film capacitor. Or alternatively, a thin film capacitor is manufactured by sequentially laminating a NaCl oxide thin layer oriented to (100) face or a spinel oxide thin layer oriented to (100) face, a platinum thin layer as a lower electrode oriented to (100) face, a perovskite dielectric thin layer oriented to (100) face and a metal thin layer as an upper electrode on a substrate. A plasma-enhanced CVD method is applied to form a NaCl oxide thin layer, a spinel oxide thin layer and a perovskite dielectric thin layer while a vacuum deposition method, a sputtering method, a CVD method or a plasma-enhanced CVD method is applied for the formation of a metal electrode.

Abstract: A magnetic recording medium, comprising; a 2-layer film formed on a glass disk substrate as an under layer composed of an amorphous oxide or NaCl oxides like a NiO or CoO and the like, or any soft magnetic oxide of Mn-Zn ferrite, Ni-Zn ferrite and the like, or a combination of those 2 materials; a magnetic recording medium formed thereon composed of a Co ferrite perpendicular magnetic film of a columnar structure; and a structure formed thereon with a lubricant layer medium. This magnetic recording medium is used for a magnetic rigid disk apparatus. The substrate is made by press-molding the glass plate at a high temperature. The under layer film and Co ferrite film are composed of vapors of organic material compounds and oxygen as their raw materials, and made by a plasma assisted CVD method.

Abstract: Disclosed is a method of forming a Perovskite-type dielectric film on a substrate under low temperature by decomposing and reacting vapor of organometallic compound containing metal for the dielectric, vapor of organometallic compound containing titanium, and oxygen in a reduced-pressure and plasma.

Abstract: Disclosed herein is a perpendicular magnetic film of spinel type iron oxide formed on a surface of a base substrate in the form of columnar grains which are densely arranged perpendicularly to the surface of the base substrate. A vapor of an organic iron compound or a mixed vapor consisting of the organic iron compound vapor and a vapor of an organic metal compound different from the organic iron compound is added with oxygen to obtain a mixed gas. The mixed gas is subjected to chemical vapor deposition on the substrate at low temperature, at reduced pressure in plasma, thereby to obtain the perpendicular magnetic film.

Abstract: Disclosed is a composite magnetic powder comprising two crystal phases of a hexagonal ferrite portion and a spinel structure ferrite portion, which are different in thermal characteristic and in crystal structure and which are in a crystallographically epitaxial relation in each particle. The magnetic powder can be synthesized by reaction of starting components in a low temperature solution. Using the magnetic powder, a vertical magnetic recording medium can be provided, which is excellent in weather stability and suitable for short wavelength recording.

Abstract: On a cemented carbide alloy disk or a cermet disk having been coated with either an iridium (Ir) alloy film or a ruthenium (Ru) alloy film is formed guide grooves by photography or ECR ion etching. The disk thus obtained is used as an optical or magnetic disk stamper. Next, a glass or aluminium disk is placed between a pair of stampers obtained as above and molded under pressure while heating thereby to make guide grooves of an optical or magnetic disk.

Abstract: The present invention provides a platelike magnetic powder made from a magnetic powder having particles each of which has a portion comprising the spinel type crystal structure and a portion comprising the magnetoplumbite type crystal structure. The magnetic powder provides a large saturation magnetization .sigma.s and a small temperature change .DELTA.Hc/.DELTA.T of coercive force in the vicinity of the room temperature. Further, the present invention is to provide a high density magnetic recording medium which uses the magnetic powder. Furthermore, the present invention is to provide, a method to easily manufacture the magnetic powder by the coprecipitation method. A raw material powder of superfine particles is prepared. The prepared powder is fired at a low temperature in a non-oxidizing atmosphere.

Abstract: An iron-aluminum-silicon (Fe-Al-Si) series magnetic alloy magnetic head is described. The magnetic head is filled between front gap forming surfaces (the front gap facing a magnetic tape) of a pair of Fe-Al-Si core pieces with non-magnetic ceramic films formed on the respective front gap forming surfaces and a glass film formed therebetween, and between rear gap forming surfaces for junction with an Ag-Cu-In series alloy film.

Abstract: A mold for press-molding glass elements comprising a base member made of a super hard alloy or a cermet; at least one intermediate layer made of a nitride, a carbide, an oxide or a metal, provided on the base member; and a noble metal layer provided on the intermediate layer for forming a mold surface. An active metal contained in the base member is prevented from diffusing to the mold surface by the presence of the intermediate layer.

Abstract: An organic metal compound containing elements constituting a magnetic material and an oxygen gas are introduced into plasmas at a low pressure and a thin film of magnetic oxide is prepared on an organic film or aluminum at low temperature.

Abstract: A glass optical element is directly press-molded by a method using a noble mold. The mold comprises a base material and a press surface film formed on the base material. The press surface film is an Ir film, or a Ru film, or an alloy film comprising Ir and at least a member selected from the group consisting of Pt, Re, Os, Rh and Ru, or an alloy film comprising Ru and at least a member selected from the group consisting of Pt, Re, Os and Rh.

Abstract: Disclosed is a molding method for producing an optical glass element which comprises the steps of preparing a mold coated with a thin film of a noble metal alloy, and molding optical glass into the form of an optical glass element by using the mold while applying heat and pressure to the optical glass. Further disclosed is such a mold that is coated with a thin film of a noble metal alloy, for producing an optical glass element.

Abstract: A mold used for manufacturing optical glass parts by the direct press molding of lumps of raw optical glass. The pressing surface of the mold is made of a material comprising .alpha. type SiC or amorphous SiC or a mixture of both. The pressing surface may be a coated film on a base body of hard alloy or high density carbon.

Abstract: An oxygen sensor whose sensing element is covered by a cylindrical porous filter cap, prepared by sintering metallic wool such as nickel-chromium alloy wool for protecting the sensing element from damage by mechanical shock and thermal shock due to a high flow pressure of a high temperature gas and for easy determination of sensing response time.