An ultrasonic wave nebulizer for converting water or liquid to mist has a disc-shaped piezoelectric vibrator (1) which has a pair of surfaces one of which is defined as an operation surface. A mesh (3) is located close to said operation surface so that a gap (G) or a thin water or liquid film is defined...http://www.google.com.tw/patents/US5299739?utm_source=gb-gplus-share專利 US5299739 - Ultrasonic wave nebulizer
