Hi Jim I just pulled one of our 4layer (do take bit more heat) cards random from after wave ( a little Seho with foam > found spray too messy ) and : The standard small pads you should be able to fill bottom easy ; barrel you'll start to feel the climb (lesser mortals talk about 75% fill) ; the top will sort out the wolfs from sheep : we manage all top pad fill on standard pads ; but once you go to large pads with bigger than standard rim you'll start to display outer golden rings ; say 0.2 - 0.5 mm rim ; on large pads (heatsinks) just forget it ; you'll fill only the barrel ; which should We use ancient Multi's X32 10i no clean ; I did have tendencies to upstyle to Kest's etc. with perhaps more bitey composition ; but was never quite forced enough to it . Preheat some 150'C ; wave 240-250'C ; just about all ; both sides wave open ; deadly simple . Have a fun Jim ; let us here know if you hit the wall ; always fancy gold's versatility ; we have switchpads all over . See yo' Paul Klasek http://www.resmed.com > ---------- > From: Jim Kittel[SMTP:[log in to unmask]] > Sent: Wednesday, 20 January 1999 8:40 > To: [log in to unmask] > Subject: [TN] Gold Immersion at Wave Solder > > Technetter's, > I have a question about immersion gold plating vrs HASL on thru hole > boards to be wave soldered. > > We are currently using HASL and considering switching. Is there any > difference to be expected in top side wetting of gold vrs HASL? Also, > is there any significant difference in appearance between top side and > bottom side solder fillet when using gold immersion? Are their any > other issues? > > ################################################################ > 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 ################################################################