Abstract: A magnetron sputtering cathode includes: a yoke; a magnetic circuit having a central magnet portion, a peripheral edge magnet portion, an auxiliary magnet portion, and a parallel area; and a backing plate. The central magnet portion, the peripheral edge magnet portion, and the auxiliary magnet portion are disposed so that polarities of tip portions of the central magnet portion, the peripheral edge magnet portion, and the auxiliary magnet portion are different from each other at portions between adjacent magnet portions. The magnetic field profile observed from above of the backing plate and the magnetic flux density in a horizontal direction are determined so that the magnetic flux density in a first area is a positive value and the magnetic flux density in a second area is a negative value with respect to a position corresponding to the central magnet portion as a boundary.

Abstract: A dispersant for coal into oils which comprises a metal salt of a dialkyl sulfosuccinate and a lower aliphatic alcohol and a coal-oil mixed fuel containing the dispersant. The coal-oil mixed fuel containing the dispersant is provided with excellent stability and fluidity for a long period of time by virtue of a high dispersing effect of the dispersant.