Hi Dwayne - I suggest you get a copy of the recently held IPC PWB Surface Finishes and Solderability conference proceedings. There were a number of presentations that include information, both pro and con, on the use of immersion gold. The biggest driver for switching to immersion gold from HASL was not solder joint reliability but the need for a flat pad for fine pitch onseration. Give Jack Crawford at IPC a call for info on how to get the proceedings. Good Luck. Dave Hillman Rockwell Collins [log in to unmask] [log in to unmask] on 10/01/97 07:00:07 AM Please respond to [log in to unmask]; Please respond to [log in to unmask] To: [log in to unmask] cc: (bcc: David D Hillman/CedarRapids/Collins/Rockwell) Subject: [TECHNET] Gold Immersion Plating I am considering to switch the plating used on our PCB's from HASL to gold immersion. The reason I am considering making this change is to improve the solder joint reliability of our 20mil components. My company is a manufacture of RF products from 300MHz to 2.4GHz. When I switch to gold immersion plating is there any electrical characteristics I should be concerned about between gold immersion and HASL. Is there any types of testing I should do to verify I did not change the performance of my products. Any information would be helpful. Thank you for you time. Dwayne Niewiemski Director of Manufacturing Engineering Microwave Data Systems Rochester, New York ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ############################################################## ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################