Another alternative, if you feel you need the reflowed solder, is to relieve the mask from the widest traces (over .050) to prevent the problem. There are some guidelines for this in IPC-D-275 (5.5.1) or its replacement document... ______________________________ Reply Separator _________________________________ Subject: Re: [TECHNET] Solder mask material -Reply Author: "TechNet Mail Forum." <[log in to unmask]>, annie laberge <[log in to unmask]> at INTERNET_GATEWAY