The adhesion forces between the micro-particles and the dielectric surface were analyzed. The adhesion of a particle with 1.5 microns in diameter to a surface was estimated to be about 10 -6 newtons. Experimentally, the optical pressure of a focused laser pulse was used to determine the adhesion between the quartz particles and a sapphire surface. This pressure was found to be very close to the estimated adhesion. It was also shown that the capillary force was the dominant component in the experiment.