Yes, published data indicates that even at a gold thickness of 10 microinches you'd have much less than 1% Au in the solder joint. Rob Schetty LeaRonal Inc. ---------- From: TechNet Mail Forum on behalf of [log in to unmask] Sent: Friday, August 08, 1997 2:50 PM To: [log in to unmask] Subject: Re: [TECHNET] micro bga Isn't it true that with gold flash your thickness of gold, usually less than 10 microinches, is such a small amount of gold that you would never get a 3% to 5% gold concentration in your solderjoint thus making gold embrittlement not an issue. ______________________________ Reply Separator _________________________________ Subject: Re: [TECHNET] micro bga Author: Non-HP-bwhite ([log in to unmask]) at HP-Vancouver,mimegw10