SMT钢板开孔案例分析PPT

钢板开孔案例分析,目录,1、鋼网的光學點形式a.黑色盲孔.光學點一律不貫穿.b.半蝕刻部份以黑色epoxy填滿,一、G/C鋼板開孔設計規範,4、鋼板制作方法須用Laser切割,並電拋光處理.,3、鋼板張力a.新的鋼板張力須35N/cmb.鋼板張力1.52.面積比(AreaRatio)=開口面積(LxW)/孔壁的面積2x(L+W)xT0.66,1.ChipR,C(0402),方形PAD,通常法一:X=X1=0.608Y=Y1=0.558D1=D+0.143=1.108,二、無延伸腳類零件鋼板基本規範,2.ChipR,L,C(0603),方形PAD,通常法一:Y=Y1=0.77X=X1=0.77D=0.66D1=D+0.2=0.86=1/3*Y1=0.26面積1/2Y=Y1=1.20X=0.98mmX1=X-0.1=0.97,3.ChipL,C(0603),橢圓形PAD,通常法一:D=0.6D1=D+0.15=0.75=1/3*Y1=0.4面積1/2圓,4.ChipR(0603),橢圓形PAD,通常法二:Y=Y1=1.20X=X1=0.98D=0.6D1=D+0.2=0.8,5.ChipR,L,C(0805),方形PAD,通常法一:Y=Y1=1.28X=1.1X1=X-0.18=0.92D=0.77D1=D+0.36=1.1=1/3*Y1=0.42面積1/2圓,6.ChipL(0805),方形PAD,通常法一:Y=Y1=1.7X=1.78X1=X-0.25=1.53D=0.25D1=D+0.5=0.75=1/3*Y1=0.56面積1/2圓,7.ChipR,L,C(1206),橢圓形PAD,通常法一:Y=Y1=1.8X=X1=1.03D=D1=2.0=1/3*Y1=0.6面積1/2圓,8.FUSE(1206),通常法一:Y=Y1=2.18Y2=1/3*Y1=0.73X=X1=1.43D=D=1.52,9.FUSE(1206),通常法二:Y=Y1=2.18X=X1=1.43D=D1=1.52X2=1/2*X=0.72Y2=0.3Y3=1.1,Y2=0.3,D1=1.52,10.鋁質電容與鉭質電容共用PAD:Y=Y1=2.54X1=X-0.1=2.58D1=D+0.2=0.97=1/3*Y1=0.84面積1/2圓,11.鉭質電容(1210),法一Y=Y1=1.88X=2.6X1=X-0.1=2.5D=1.0D1=D+0.2=1.2=1/3*Y1=0.62面積1/2圓,12.SOT252大顆及小顆功率晶體大PAD分成網格狀開孔X=5.87Y=6.02D=2.3X1=2.25Y1=2.3W=0.5W1=0.4D1=D+1.0=3.3如圖所示,13.CN(1206)排容,通常法一:Y=Y1=1.28mm向外移0.1mmX=X1=0.57mmD=0.2mmD=0.5mmX2=X1-0.12=0.45mm縮孔且外移0.1mmD1=D+0.2=0.7mm,X=0.3,14.RN(0704)排阻,通常法一:Y=0.6X=0.5D=0.2X=0.3Y1=0.6X1=X+0.05=0.55D1=D+0.05=0.25Y2=Y+0.1=0.7X2=X-0.05=0.25縮孔如圖所示,角落四角倒圓角,15.RN,CN(1206),法一:Y=Y1=1.02X1=X-0.23=0.54D=0.5D1=D+0.2=0.7角落四角倒圓角.中間四腳1:1開孔,Y=0.58,X=0.52,D=0.2,D=0.45,X=0.3,16.RN(0704整體特殊PAD)法一:Y=Y1=0.58X=0.52X1=X+0.05=0.57D1=D=0.2D=0.45D2=D+0.05=0.25Y3=Y+0.1=0.68X1=X1=X=0.3D3=D+0.1=0.55角落四角導圓角,17.RN(0805)排阻,通常法一:X=X-0.108=0.4X3=X-0.208=0.3X2=X-0.19=0.20X1=X1-0.014=0.24Y2=Y-0.1=0.5Y=Y1=0.6D1=D-0.309=0.4四角成梯形,18.長寬開孔1:1,間距外移0.1角落四角導圓角Y=Y1=1.28,X=X1=0.57Y2=Y+0.1=1.38X2=X-0.12=0.45D=0.2D1=D+0.25=0.45,19.SOT223大顆及小顆功率晶體,通常法一:Y1=Y=8.35X1=X=3.8D1=D=0.78開孔1:1,X1=1.55,20.晶振,法一L1=L=5.44W1=W=1.7D=2.75D1=D+0.2=2.95,21.晶振,法二X=X1=1.3Y=Y2=1.9開孔1:1,22.三极管Y=Y1=1.28X=X1=1.28D=D1=1.1D=D1=0.65開孔均1:1,L=1.9,W=0.3,1.Pitch=1.27但與ViaHole較近,鋼板開孔直徑2=0.42d.最里層Pitch=1.0鋼板開孔直徑1=0.42,4.Pitch=1.0mm的BGA(LANCHIP)原始焊盤的直徑=0.51鋼板開孔直徑1=-0.03=0.48,5.Pitch=0.8mm的BGA(LANCHIP)原始焊盤的直徑=0.3鋼板開孔直徑1=+0.08=0.38開方形四角導圓角,1.Pin-in-PasteThroughHole的鋼板規範:PTHPAD邊緣可OverPrint的距離OP3.048mm鋼板相鄰開口間距須Ds0.3048mm鋼板開口與相鄰的StandOff使用區須距Ss0.127mm鋼板開口與相鄰的測試點：(1)若TestPoint有開，Ts0.254mm(2)若TestPoint沒開，Ts0.127mm鋼板開口須距板邊Be0.2286mm,五、ThroughHole零件鋼板基本規範,2.若Pin-in-PastePTH的Drill直徑d0.305mm(泛指BoardLock,Kink,MetalPost),則:TOPSIDE:其鋼板開口須劃分成四塊,相鄰兩塊須距Db0.3048mm,以降低錫膏量太多被高速機甩掉.BOTTOMSIDE:,3.多列PTH時鋼板開口但列與列間PAD距離Dp0.152mm:所有鋼板開口皆用四方形或菱形.