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BGA区域防焊开窗及PAD尺寸规范不同平台的BGA规范及相关尺寸管控定义目前在制主要有2种BGA设计:0.5Pitch,0.4Pitch。0.5mmptich以6253为例,规格如下:0.5mmPITCH的BGA规范(针对NSMD设计)生产板管控范围:防焊桥宽度=0.05-0.13mm(2-3mil)防焊窗单边宽度=0-0.05mil(0-2mil)防焊窗直径(A)=0.33-0.42mm(13-16.5mil)开窗斜对角(B)=0.41–0.51mm(14-20mil)PAD直径(C1)=0.23-0.27mm(9.05-10.6mil)PAD直径(C2)=0.26–0.30mm(10.3-11.8milBGAGEBER资料设计:防焊桥宽度=0.13mm(5.12mil)防焊窗单边宽度=0.05mm(2mil)防焊窗直径(A)=0.37mm(14.6mil)开窗斜对角(B)=0.482mm(18.9mil)PAD直径(C1)=0.27mm(10.6mil)PAD直径(C2)=0.30mm(11.8mil)备注:1.0.5PITCH的6253平台的BGA防焊窗采用方形倒角设计;2.0.5PITCH的其它平台的BGA防焊窗采用圆形设计。备注:以上均针对非走线的规范设计区域,走线区域会适量加大R角或削防焊窗。0.5mmPITCH的BGA规范(针对NSMD设计)对于方形开窗倒角位置走线可能会漏铜时,倒角可做调整成圆弧或倒直线角。√0.5mmPITCH的BGA规范(针对NSMD设计)0.5mmPITCH6253平台的防焊窗设计0.5mmPITCH其它平台的防焊窗设计0.5mmPITCH的BGA规范(针对大铜面绿油窗设计)0.5mmPITCHSMD区域的防焊窗按圆形设计防焊窗直径(C)=0.25-0.30mm(9.8-11.8mil)0.5mmPITCH大铜面NSMD的防焊窗按圆形设计防焊窗直径(A)=0.32-0.39mm(11.8-15.4mil)A生产板管控范围:防焊桥宽度=0.05-0.076mm(2-3mil)防焊窗单边宽度=0.015-0.05mm(0.6-2mil)防焊窗直径(a)=0.30-0.34mm(11.8-13.5mil)开窗斜对角=0.35–0.46mm(14-18mil)PAD直径=0.22-0.25mm(8.65-9.8mil)0.4mmPitch的BGA规范(针对NSMD设计)BGAGEBER资料设计:防焊桥宽度=0.075mm(3mil)防焊窗单边宽度=0.038mm(1.5mil)防焊窗直径(a)=0.325mm(12.8mil)开窗斜对角=0.418mm(16.5mil)PAD直径=0.25mm(9.8mil)a备注:以上均针对非走线的规范设计区域,走线区域会适量加大R角或削防焊窗。0.4mmPitch的BGA规范(针对NSMD设计)对于方形开窗倒角位置走线可能会漏铜时,倒角可做调整成圆弧或倒直线角。√√0.4mmPITCH的BGA规范(针对SMD设计)0.4mmPITCHSMD区域的防焊窗按圆形设计防焊窗直径(C)=0.23-0.26mm(9.1-10.3mil)0.4mmPITCH大铜面NSMD的防焊窗按圆形设计防焊窗直径(A)=0.29-0.34mm(11.4-13.5mil)A0.4mmPITCHBGA设计规范(以MTK6575为例)0.4mmPitch设计MTK6573平台、MTK6575平台展示1、MTK6573平台展示BGAPAD大小0.254mm,公差:+/-10%,Pitch0.4mm,防焊开窗0.325mm,盲孔0.1mm,盲孔位于BGAPAD中心,盲孔PAD与BGAPAD等大,PIN:518个,盲孔电镀填平工艺。2、MTK6575平台展示BGAPAD大小0.254mm,公差:+/-10%,Pitch0.4mm,防焊开窗0.325mm,盲孔0.1mm,盲孔位于BGAPAD中心,盲孔PAD与BGAPAD等大,PIN:537个,中间153个pin由开窗定义BGAPAD大小盲孔电镀填平工艺。完毕!谢谢!
本文标题:BGA区域防焊窗及PAD尺寸规范
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