Patent ID: 7014969

Claim:
A silica fine particle which has been hydrophobic treated, and has a peak in a particle diameter range of 0.04 μm or more and less than 1 μm and a peak in the particle diameter range of 1 μm or more and less than 100 μm in a volume-basis particle diameter distribution measured by using a laser diffraction particle diameter distribution-meter, wherein the silica fine particle has a frequency ratio of 10 to 80% for the particles with a particle diameter in the range of 0.04 μm or more and less than 1 μm to a total of all the peaks, and has the frequency ratio of less than 16% for the particles with the particle diameter of 20 μm or more and less than 2000 μm to the total of all the peaks, respected to the volume-basis particle diameter distribution.