焊盘的实际尺寸是900mm*1000mm 丝网开孔方式采取防锡珠处理，且长宽各缩10% Best Regards 屈小红（Qu Xiaohong） Alcatel Shanghai Bell Co,Ltd *: 50554550-7771 *: [log in to unmask] <mailto:[log in to unmask]> ________________________________ From: HouToby [mailto:[log in to unmask]] Sent: 2009年4月10日 22:20 To: [log in to unmask]; QU Xiaohong Subject: RE: [TGAsia] 答复: [TGAsia] chip-0603 锡 珠不 良 可否提供具体的开口尺寸? ________________________________ Date: Fri, 10 Apr 2009 09:02:18 +0800 From: [log in to unmask] Subject: Re: [TGAsia] 答复: [TGAsia] chip-0603 锡 珠不 良 To: [log in to unmask] 把网板开孔改为防锡珠的凹型，效果应该比较明显。 Best Regards 屈小红（Qu Xiaohong） Alcatel Shanghai Bell Co,Ltd *: 50554550-7771 *: [log in to unmask] <mailto:[log in to unmask]> < /SPAN> ________________________________ From: TGAsia [mailto:[log in to unmask]] On Behalf Of Cony Su Sent: 2009年4月9日 17:12 To: [log in to unmask] Subject: Re: [TGAsia] 答复: [TGAsia] chip-0603 锡 珠不 良 试试下列方法看看有效果没 1 .橡皮擦拭PCB 焊盘 2.减少锡膏量 3.更换锡膏 4.预热加快 5 .更换不同batch的电容 HouToby <[log in to unmask]> Sent by: TGAsia <[log in to unmask]> 2009-04-08 21:23 Please respond to Asia Committe Task Group Forum <[log in to unmask]>; Please respond to HouToby <[log in to unmask]> To [log in to unmask] cc Subject [TGAsia] chip-0603锡 珠不良 Dear all: 最近遇到了个很棘手的问题,现在公司有一个产品,每次生产,板子上0603chip零件体侧有锡珠产生,位置很不固定.偶尔这个位置,偶尔另外一个位置,最大的直径有0.2-0.3mm,最小的只有0.08mm. 现在试过很多解决方案,减少置件压力,调整温度曲线,缩小钢板开孔面积(现只有84%),板子也烘烤过, 锡膏在其他的产品也使用,但是未发现.现有的PCB 板是镀金板. 各位还有什么好的解决办法? 另外对于锡珠的标准问题,现有的IPC-A-610D 定义不违反最小电气间隙,还是否有其他的标准,目前我们板子上最小间距零件为0.5mm ________________________________ 微软地图实时路况，为您节省的不仅仅是时间！ 立即查看！ <http://ditu.live.com/default.aspx?v=2&form=MICHAJ&cp=qcbgzzsz1gzz&style=r&lvl=4&tilt=-90&dir=0&alt=-1000&phx=0&phy=0&phscl=1&trfc=1&encType=1> ***This email, its content, and any files transmitted with it, are intended solely for the addressee(s) and may be legally privileged and/or confidential. If you are not the intended recipient, please contact the sender by return and delete the material from any computer. Any review, retransmission, dissemination, or other use of, or taking of any action in reliance upon this information by persons or entities other t han the intended recipient is prohibited. Messages sent via this medium may be subjected to delays, non-delivery, and unauthorized alteration. This email has been prepared using information believed by the author to be reliable and accurate, but Indium Corporation makes no warranty as to accuracy or completeness. Indium Corporation does not accept responsibility for changes made to this email after is was sent. Any opinions or recommendations expressed herein are solely those of the author. They may be subject to change without notice.*** ________________________________ 使用新一代 Windows Live Messenger 轻松交流和共享！ 立刻下载！ <http://im.live.cn/messenger.aspx>