Hi Linda, If you want to be safe then I would recommend the Electroless Nickel and Immersion Gold finish. It has been around for a long time and is generally considered to be the best quality finish available. Specify 3-5 microns El/Nickel and 0.05-0.15 microns immersion gold. (25 microns = 1 thou") Ask for a quote as standard HASL as well so you can see the added cost of this finish. On an expensive board, it should not be too significant. Regards Paul Gould Teknacron Circuits Ltd UK [log in to unmask] -----Original Message----- From: (No Name Available) <[log in to unmask]> To: [log in to unmask] <[log in to unmask]> Date: 02 November 1998 01:31 Subject: [TN] Fine Pitch info >Hi everyone, >For increasing the placement of fine pitch devices I have heard about gold >finish, tin and silver. So tell me from everyone's experience which do I want >to use for fine pitch PC boards? We have an expensive board that we have to >process and I can make the changes this week. After that I am stuck with my >decision. Since I don't know anything other than tin/lead I am in a bit of a >pinch here. Of course I know who can give me the answers and that is you >technetters. > >Thanks for the help in advance. > >Linda >[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 ################################################################