Hi ! We are considering some changes in our vertical ( racks ) PTH line based on thin copper electroless . Today microetch section consists of : 1 ) microetch at following steady state operating conditions :sodium persulfate ( 40g/l) , sulfuric acid ( 60-80 gr/l) , dissolved copper ( 12 g/l ) 2 ) flowing rinse 3 ) sulfuric acid post-dip ( 100 to 200 g/l ) 4 ) flowing rinse 5 ) static catalyst pre-dip Due to lack of space in the line for some expansion I am considering cancelation of sulfuric acid post dip and the following rinse , since microetch solution allready has enough sulfuric acid . All opinions ( pro , contra ) will be very appreciated. Regards Edward Szpruch Eltek Ltd - Israel Tel 972 3 9395050 Fax 972 3 9309581 E-mail : [log in to unmask] ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################