Sorry we don't do this type of work. At 02:22 PM 1/5/00 +0100, you wrote: >I am doing a technology survey which needs comparison data between the two >etch processes used in PWB fabrication: acidic vs. alkaline. I would very >much appreciate to receive data on following items -- please indicate type >of product range, throughput and etch speed, type of etch resist and energy >cost -- > >1. chemical cost of etching 1 kg copper by cupric chloride and treatment >costs of spent etchant >2. chemical cost of etching 1 kg copper by alkaline etchant and treatment >costs of spent etchant. >3. quality difference between alkaline and acidic copper etching in terms of >defect density / production yields, line width uniformity, undercut, etch >profiles, >4. relevant cost for the of waste water treatment plant which are >attributable to the etch process (only patterning not any microetch or metal >deposition process) in absolute figures and in percentage of total waste >water treatment installation costs. >5. transport cost for spent etchants; conditions of the supplier / recycler >for the etchant "lease". >6. total cost of ownership for etching 1 kg copper by cupric chloride >7. total cost of ownership for etching 1 kg copper by alkaline etchant. > >Thanks. > >############################################################## >TechNet Mail List 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 web site (http://www.ipc.org/html/forum.htm) for additional >information. >If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or >847-509-9700 ext.5365 >############################################################## > ############################################################## TechNet Mail List 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 web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################