Air assisted apparatus and method for selective coating

A mask-free method of coating selected areas of a circuit board with a liquid coating material without coating regions of said circuit board to be left uncoated, comprising the steps of:

• emitting said liquid coating material as a nonatomized liquid from a liquid spray device;
• operating in a first mode by directing jets of air into impinging relation with said liquid coating material emitted from said liquid spray device as a stream of liquid coating material to transform said stream of liquid coating material into an atomized, shaped spray pattern adapted for coating certain of said selected areas of said circuit board;
• and
• operating in a second mode wherein said liquid coating material is emitted from said liquid spray device as a nonatomized, liquid film having a shaped film pattern adapted for coating certain of said selected areas with said liquid film without coating said regions of said circuit board to be left uncoated.