一般來說化金製程的厚度多為1~5U”之間此種規格最多 但是實際上若要焊錫性不錯且不易產生可靠度問題.則 建議規格為1~3u”. 超過3U”以上在化金製作過程中.化金時間較長鎳層就比較 容易被攻擊..後續問題就會比較多一點 ________________________________ From: TGAsia [mailto:[log in to unmask]] On Behalf Of YangYanBo Sent: Friday, March 18, 2011 1:47 PM To: [log in to unmask] Subject: [TGAsia] 答复: [TGAsia] Immersion gold - gold thickne ss Normally 2-5u'' ________________________________ 发件人: TGAsia [mailto:[log in to unmask]] 代表 Patricia Lui 发送时间: 2011年3月17日 8:31 收件人: [log in to unmask] 主题: [TGAsia] Immersion gold - gold thickness Dear PCB manufacturers and friends, I have a query on the Immersion gold gold thickness, can you advise me what is the standard or most common gold thickness you are making if your customer do not have any high gold thickness requirements. Because I noticed that most PCB supplier will advise 1u"-3u" but the actual gold thickness is slightly >1u" only. It have never near to 2u". My customers had advised me that to meet IPC class 2 immersion gold boards gold thickness have to meet minmum 2u". Please advise are you also making mostly 1u"-3u" actual slightly >1u"? is this acceptable and the common practice? Hope to have your favourable advise. Thansk & Best Regards Patricia Lui Xuan Technologies ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________