A method of forming fine partition walls by which fine partition walls with stable
shape can be formed with good processing accuracy and at good grinding efficiency
by a jet processing technique, a method of producing a planar display device by
application of the method, and an abrasive for jet processing to be used in these
methods, are disclosed. The fine partition walls are formed on the surface of a
substrate by jet processing using an abrasive comprised of a powder of calcium
carbonate coated with silicone on the surfaces thereof. Each of the particles constituting
the abrasive has a three-dimensional shape comprised of a stack of different-sized
triangular or more-angular polygonal layers.
