The gold flash spec is usually from your vendors capability. However as noted in a report published in the proceedings from the IPC Summit on Surface Finishes and Solderability, Sep. 97, For solderability reasons the minimum should never go below 3 microinch. Each application should be tested independently to make sure this is an adequate thickness for whatever application it is going into. The thinner the gold the easier it is wiped off and in addition the more pores it will have making it more susceptible to oxidation of the nickel barrier under the gold. Flash gold pores are not specified they are there and there are usually too many to count. Once again check with your supplier on expected hardness and gold purity of the plating. Regards: Steve O'Hara HP ______________________________ Reply Separator _________________________________ Subject: Re: [TN] : FAB: Flash Gold Author: Non-HP-MYuen ([log in to unmask]) at HP-Vancouver,uugw10 Date: 3/23/98 6:13 AM IPC-D-275 Section 3.8.4.3. Hope that helps Michael Yuen ---------- From: Poh Kong Hui To: [log in to unmask] Subject: Re: [TN] : FAB: Flash Gold Date: Monday, March 23, 1998 8:45AM Hi Technetters, Could someone can advise me on what standard (such as IPC) to use for the requirement of Gold flash PCB, such as gold min/max thickness, surface porosity, hardness, and etc. Thks in Advance. Poh ################################################################ 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 web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ 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 web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################