Patent ID: 6077359
Filing Date: 2000-06-20
Classification: B01J,C23F,C25D,G03F,H05K,Y10S

Abstract:
A method of treatment of printed circuit boards or conductor films with a treatment liquid; said method comprising the steps of transporting the printed circuit boards or conductor films in a horizontal direction along a transport plane bypassing the printed circuit boards or conductor films through a bath of the treatment liquid;contacting an underside of the printed circuit boards or conductor films with the treatment liquid in a treatment bath;contacting an upper side of the printed circuit boards or conductor films with the treatment liquid in a liquid build-up space;passing the treatment liquid through nozzles that are in the bath of treatment liquid and that are at a spacing of 20 to 300 mm from the transport plane;applying the treatment liquid onto surfaces of the printed circuit boards or conductor films as a liquid jet from said nozzles, thereby,forming cavitation bubbles within the liquid jet, wherein the cavitation bubbles are generated by outflow of the treatment liquid, which is under high pressure and set in an eddy current movement from the nozzles, whereby,the cavitation bubbles are applied onto the surfaces of the printed circuit boards or conductor films.