Abstract: A magnetic recording media comprising a non-magnetic substrate, a ferromagnetic thin film on the non-magnetic substrate, a hard carbon film on the ferromagnetic thin film, a modified layer of which atomic ratio of nitrogen/carbon is 0.8% or more, and of which thickness is less than 3 nm on the hard carbon film, and a lubricant layer on the modified layer, has excellent electromagnetic conversion characteristic, running stability, durability, and weatherability.

Abstract: A magnetic recording medium comprising a back coating layer formed on a surface reverse to a magnetic layer and a carbonaceous film which is formed on the back coating layer and contains fluorine atoms and silicon atoms and/or nitrogen atoms and in which a concentration of fluorine atoms decreases in a depth direction from a surface of the carbonaceous film, while a concentration of the silicon and/or nitrogen atoms increases in the depth direction from the surface of the carbonaceous film, which recording medium has improved running stability, durability and weatherability while electromagnetic conversion characteristics are maintained.

Abstract: A magnetic recording medium comprising a non-magnetic substrate, a ferromagnetic metal film formed on said non-magnetic substrate, a carbon film which is formed on said ferromagnetic metal film and in which a concentration of at least one element selected from the group consisting of silicon, phosphorus, sulfur, tin and indium is or concentrations of boron and at least one element selected from the group consisting of tin and indium are decreased in a depth direction from the surface of said carbon film, and a lubricant layer formed on said carbon film, which medium has improved running durability and corrosion resistance.

Abstract: A scroll type fluid machine including two scroll members, each having a spiral body formed on a base plate, which are arranged to make their spiral bodies mesh with each other to form a confined space therebetween, one of said scroll members being arranged to make an orbiting movement relatively to the other scroll member to successively enlarge or reduce said confined space to expand or contract a fluid confined in said space, wherein said spiral body has a shape formed by an involute based on a circle having a radius which varies in accordance with an involute angle.

Abstract: A magnetic recording medium comprising: a non-magnetic substrate; a ferromagnetic metal thin film provided on the non-magnetic substrate; a filmlike first carbon layer provided on the ferromagnetic metal thin film; and a hard and amorphous second carbon layer provided on the first carbon layer; the first and second carbon layers having first and second Raman spectra based on Raman spectrophotometry, respectively; assuming that when each of the first and second Raman spectra is decomposed into a first band of Gaussian function having a peak in the vicinity of 1380 cm.sup.-1 and a second band of Gaussian function having a peak in the vicinity of 1550 cm.sup.-1 in X-Y rectangular coordinates with an X-axis expressed in cm.sup.

Abstract: A method of forming a film on a substrate by plasma CVD, comprising the steps of: providing a discharge tube in a vacuum chamber; providing a partition wall around the discharge tube; evacuating space between the discharge tube and the partition wall to vacuum; providing the substrate at a position confronting the discharge tube; and effecting plasma discharge in the discharge tube.

Abstract: In plasma discharge to form a film on a magnetic tape of the like in a plasma CVD process, a hollow electrode 12 is arranged in a discharge tube 8 or arranged opposed to another electrode 34. A non-polymerizable gas is blown out from the inside of the hollow electrode 12 made from a sintered alloy, and impurities do not adhere to the electrode. Then, small traces of discharge are not generated on the magnetic tape and impurities do not contaminate the magnetic tape, so that a uniform thin film of high quality is manufactured at a high rate in an industrial scale.

Abstract: An exhaust gas diffuser to be connected to the discharge end of an exhaust pipe of an engine, having a tubular body of a relatively flattened cross-sectional shape and having opposite open axial ends, wherein the discharge end of the exhaust pipe is connected to one of the open opposite ends while the openings left at opposite sides of the discharge end of the exhaust pipe form first external air inlet ports, wherein second external air inlet ports are provided at opposite flattened wall portions of the tubular body with upstream edges of the second external air inlet ports being obliquely bent inwardly so as to define a throttling nozzle, while the other open axial end of the tubular body forms an exhaust port through which exhaust gases discharged from the exhaust pipe are discharged mixed with air entrained principally through the second external air inlet ports.