Patent ID: 6086269
Filing Date: 2000-07-11
Classification: B05D,G03F,H01L,Y10S

Abstract:
An apparatus for applying a substance to a surface, comprising:a housing;at least one feeder associated with said housing for receiving a substance to be applied to a surface having a middle and an edge; andjets for carrying the substance to the surface, at least one of said jets disposed adjacent the middle of the surface, at least one of said jets disposed adjacent the edge of the surface, each of said lets having a predetermined radial spacing r.sub.i from the middle of the surface, said jets having jet openings, said jet opening of said at least one jet adjacent the middle of the surface being smaller than said jet opening of said at least one jet adjacent the edge of the surface, and at least some of said lets having jet opening surface areas S.sub.i varying in accordance with the formula:S.sub.i+n /S.sub.i =((r.sub.i+n+1.sup.2 -r.sub.i+n.sup.2)/(r.sub.i+1.sup.2 -r.sub.i.sup.2)).