SMT 鋼板設(shè)計(jì)規(guī)范

1、1NB3 SMT 鋼板設(shè)計(jì)規(guī)范鋼板設(shè)計(jì)規(guī)范NB3-SMT-Doc0090 Rev: 3CFor GP641 & SP60Edit by: YF Liao2目錄目錄鋼板尺寸規(guī)格與要求鋼板設(shè)計(jì)數(shù)據(jù)格式及工藝要求鋼板設(shè)計(jì)的依據(jù)鋼板開(kāi)口設(shè)計(jì)（常見(jiàn)元件的開(kāi)口設(shè)計(jì)）鋼板的檢驗(yàn)驗(yàn)收參考資料3鋼板尺寸規(guī)格（一）鋼板尺寸規(guī)格（一）1，Mesh: 絲網(wǎng)材質(zhì)通常用高彈力120-200目聚酯絲網(wǎng)或不銹鋼絲網(wǎng)2，Stencil: 鋼片材質(zhì)通常為不銹鋼(304L(Ni-Cr-Fe)，進(jìn)口鋼片3，F(xiàn)rame:材質(zhì)通常有鋁型材、鑄鋁、鑄鋼及不銹鋼等4，Spacer：擋塊通常為金屬鋁 另外，還有將絲網(wǎng)、鋼片、網(wǎng)框結(jié)合在

2、一起的膠水，通常要求用進(jìn)口的高性能膠水4Unit: mm505封膠網(wǎng)框鋼片絲網(wǎng)5535401515墊片鋼板尺寸規(guī)格鋼板尺寸規(guī)格 （二）（二）SP60 & GP641通用通用鋼板外框尺寸：L*W*T=650*680*28mm鋼片尺寸(Min)：L*W=530*560mm鋼片工作范圍(Min)：L*W=500*530 mm墊片尺寸：50*15*5 mmPCB印刷開(kāi)口區(qū)域位置：L方向居中，W方向離底邊固定距離160mm具體標(biāo)準(zhǔn)參考左圖具體標(biāo)準(zhǔn)參考左圖LW28M3*0.5T螺絲需嵌入鎖平15網(wǎng)框平整度要做到1.5面積比面積比(Area Ratio) ：(L W)/ 2(L+W) T 0.66脫

3、模角度（開(kāi)口內(nèi)側(cè)錐度）：脫模角度（開(kāi)口內(nèi)側(cè)錐度）：49 度度2、實(shí)際應(yīng)用、實(shí)際應(yīng)用鋼板設(shè)計(jì)除了考慮理論原則外，更重要的還要考慮到實(shí)際應(yīng)用，如下所列：鋼板設(shè)計(jì)除了考慮理論原則外，更重要的還要考慮到實(shí)際應(yīng)用，如下所列：印刷機(jī)：印刷機(jī)要求印刷機(jī)：印刷機(jī)要求STENCIL外框，外框，MARK點(diǎn)在哪面，印刷格式等點(diǎn)在哪面，印刷格式等PCB：待裝配：待裝配PCB要求哪些需開(kāi)孔，哪些不需要要求哪些需開(kāi)孔，哪些不需要工藝：印刷膠水還是錫膏？有何種工藝缺陷？是否通孔元件使用工藝：印刷膠水還是錫膏？有何種工藝缺陷？是否通孔元件使用SMT工藝？測(cè)試點(diǎn)是否開(kāi)孔？工藝？測(cè)試點(diǎn)是否開(kāi)孔？裝配密度：裝配密度越高對(duì)裝配密度：

4、裝配密度越高對(duì)STENCIL要求越高要求越高產(chǎn)品類別：產(chǎn)品裝配質(zhì)量要求越高對(duì)產(chǎn)品類別：產(chǎn)品裝配質(zhì)量要求越高對(duì)STENCIL要求越高要求越高鋼板開(kāi)口的的制程包容性：比如鋼板開(kāi)口的的制程包容性：比如DIP元件，設(shè)計(jì)開(kāi)口時(shí)需要注意方便下錫，保證錫膏填充量元件，設(shè)計(jì)開(kāi)口時(shí)需要注意方便下錫，保證錫膏填充量等等脫模角度(a)a3最佳49 10鋼板開(kāi)口設(shè)計(jì)（常見(jiàn)元件的開(kāi)口設(shè)計(jì)）鋼板開(kāi)口設(shè)計(jì)（常見(jiàn)元件的開(kāi)口設(shè)計(jì)）必須符合設(shè)計(jì)理論依據(jù)設(shè)計(jì)最關(guān)鍵的環(huán)節(jié)是尺寸、形狀兩要素必須保證：有利于錫膏釋放和脫模；有利于改善工藝缺陷影響錫膏釋放的三大要素是：寬厚比和面積比；孔壁幾何形狀；孔壁粗糙度開(kāi)孔設(shè)計(jì)須遵循一般通用規(guī)則，但

5、須以現(xiàn)場(chǎng)工藝環(huán)境作為基礎(chǔ)1.鋼板開(kāi)口設(shè)計(jì)前需要考量的要素：鋼板開(kāi)口設(shè)計(jì)前需要考量的要素：2. 鋼板開(kāi)口尺寸、形狀設(shè)計(jì)通用原則：鋼板開(kāi)口尺寸、形狀設(shè)計(jì)通用原則：合適的孔壁錐度(4-9)有利于焊膏釋放和脫模圓角比直角有更好的脫模效果設(shè)計(jì)目的皆是力圖避免或改善諸如錫珠、橋連等工藝缺陷Aperture寬度減小應(yīng)對(duì)稱進(jìn)行，以使錫膏居中Aperture長(zhǎng)度減小應(yīng)盡量在元件內(nèi)側(cè)以避免“Underchip”錫珠開(kāi)孔尺寸應(yīng)符合寬厚比和面積比公式一般，Aperture應(yīng)略小于PAD尺寸以利于減少錫膏移位和減少錫珠0.8mm以上間距元件或其他需較多錫量元件開(kāi)孔可按1:1小于0.12mm厚STENCIL時(shí)，開(kāi)孔可考慮

6、按1:1BGA開(kāi)孔尺寸應(yīng)考慮大于PAD11鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（RCL chip-0402）PCB PadStencil Aperture0.5mm0.94mm0.5mm0.44mm0.6mm0.635mm0.6mm0. 6mm0.2mm0.2mm0.305mm倒R角倒R角12鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ RCL chip-0603 ）PCB PadStencil Aperture0.7mm （W）0.66mm0.7mm0.76mm0. 8mm （L）1/3 L1/3 W0.8mm13鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ RCL chip-0805 ）PCB PadStencil Apertur

7、e0.85mm0.94mm1mm1.34mm （L）1/3 L1/3 W1.34mm0.94mm （W）WLDDWL1/3 W1/3 L14鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ RC array chip ）PCB PadStencil Aperture0.33mm0.76mm0.32mm0.285mm0.86mm0.65mm1.1mm0.3mm0.327mm1.1mm0.3mm倒R角倒R角15鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Crystal (晶振晶振) ）PCB PadStencil ApertureLWLWLWLW16鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Diode/Transistor ）PCB PadS

8、tencil ApertureLWLWWLWL17鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Transistor/Mosfet ）PCB PadStencil Aperture0.72mm (W)1.52mm (L)0.9mm 0.5mm WL0.5mm 0.534mm (W)1.75mm (L)1.95mm0.73mm18PCB PadStencil Aperture0.5mm (W)0.71mm (L)0.86mmW0.76mm (W)1mm (L)0.97mm 0.5mm WL0.4mm 0.4mm0.4mm 0.4mm鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Transistor/Mosfet ）19鋼板開(kāi)口

9、設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ LED ）PCB PadStencil Aperture1.2mm (L)1.02mm (W)0.4mm1.2mm0.55mm1/3 L1/3 W1.02mm1.5mm0.99mm0.89mm 0.89mm1.5mm1.09mm0.84mm 0.89mm20鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Transformer ）PCB PadStencil Aperture1.2mm (L)0.28mm (W)1.4mm (L)0.28mm (W)倒R角21鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Fine pitch QFP ）PCB PadStencil Aperture0.4 pitch QF

10、P0.4mm (P)0.254mm (W)1.5mm (L)0.18mm0.22mm0.85mm0.5mm倒R角0.147mm0.165mm寬度(W)方向內(nèi)切15%22鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Fine pitch QFP ）PCB PadStencil Aperture0.4 pitch QFP （E-PAD）0.4mm (P)0.23mm (W)1.5mm (L)0.187mm 0.213mm0.85mm0.5mm倒R角0.173mm0.165mm寬度(W)方向內(nèi)切10%QFP中間如有 ground如有透氣孔開(kāi)口時(shí)要避開(kāi),并且開(kāi)口面積要盡量 50% ground pad.23鋼板開(kāi)口設(shè)

11、計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Fine pitch QFN ）PCB PadStencil Aperture0.4mm (P)0.2mm (W)0.6mm (L)0.2mm0.4 pitch QFN0.22mmL寬度(W)方向內(nèi)切10%0.18mm (90% W)倒R角24鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ QFP ）PCB PadStencil Aperture0.5 pitch QFP倒R角0.218mm0.282mm0.5mm (P)1.5mm (L)0.246mm0.254mm (W)1.5mm (L)寬度(W)方向內(nèi)切7%25鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ QFN ）PCB PadStencil Ap

12、ertureQFN中間 ground如有透氣孔開(kāi)口時(shí)要避開(kāi)0.5 pitch QFN1mm (L)長(zhǎng)度(L)方向外擴(kuò)15%，內(nèi)擴(kuò)10%0.3mm (W)1.24mm0.23mm 0.27mm架橋?qū)挾?.50.8mm倒R角26鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ QFN ）QFN中間 ground如有透氣孔開(kāi)口時(shí)要避開(kāi)1.22mm0.23mm倒R角1.27mm (L)0.28mm (W)0.5mm (P)0.5 pitch QFN0.25mm1.52mm長(zhǎng)度(L)方向外擴(kuò)15%，內(nèi)擴(kuò)10%0.27mmPCB PadStencil Aperture27鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ SOP ）PCB Pad

13、Stencil Aperture倒R角0.3mm1.726mm1.726mm (L)0.3mm (W)0.335mm28鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Switch ）PCB PadStencil Aperture1.1mm (W)1.8mm (L)1.19mm0.46mm1.245mm2.05mm1.36mm0.6mm1.4mm (W)1.6mm (L)1.75mm1.4mm29鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ BGA-CPU Socket ）PCB PadStencil Aperture1.27mm (P)0.6mm0.66mm30鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ BGA ）PCB PadStenc

14、il Aperture0.356mm (d3)0.3mm (d2)0.4mm (d1)d1=d2=d30.4mm (d3)0.4mm (d2)0.4mm (d1)0.356mm (d)0.4*0.4mm 倒R角31鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ BGA ）PCB PadStencil Aperture0.4mm (d)0.4*0.4mm 倒R角0.456mm (d)0.5mm 32鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ BGA ）PCB PadStencil Aperture0.356mm (d)0.4mm 0.8mm (P)0.356mm (d)0.4*0.4mm 倒R角33鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（

15、 DDR connector ）PCB PadStencil Aperture0.356mm (W)0.6mm (P)2mm (L)3.5 mm4.6 mm0.28mm0.32mm2.5mm長(zhǎng)度(L)方向外擴(kuò)0.6mm，內(nèi)切0.1mm3.5mm4.6 mm直徑為2mm0.73mm倒R角34鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Mini PCI connector ）PCB PadStencil Aperture2 mm (L)0.19 mm0.6 mm (W)4 mm3.2 mm4 mm3.2 mm直徑為1.5mm0. 5 mm2.2 mm0.8 mm倒R角35鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ CRT c

16、onnector ）PCB PadStencil Aperture1 mmGap 0.5 mmGap 0.37 mm1.8 mm1.15 mm0.965 mm0.18mm1.12 mm1.6 mmGAP 0.24 mm0.9 mm1.6 mm1.12 mm36鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ DVI connector ）PCB PadStencil Aperture1.27mm0.6mm1.06mm1.45mm0.45mm0.35mm2.8mm3.5mm正面反面在固定PAD 圓環(huán)位置開(kāi)口加鋪錫37鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ HDMI connector ）PCB PadStencil Aper

17、ture1.9 mm (L)0.3 mmGap 0.19 mm0.2 mmGap 0.3 mm2.25 mm長(zhǎng)度(L)方向外擴(kuò)0.45mm，內(nèi)切0.1mm 0.86 mmGap 0.14 mm1.48 mm0.73 mmGap 0.27 mmGap 0.25 mm38鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ USB connector ）PCB PadStencil Aperture1.32 mm3.2 mm1.72 mm3.6 mm1.32 mm1. 6*1.6 mm39鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ 1394 connector ）PCB PadStencil Aperture反面上件1.12 mmSS

18、架橋0.4 mm1.8 mmCS0.65 mm1.12 mm3.0 mm3.2 mm1.8 mm4.38 mm2 mm正面上件1.12 mm3.95 mm1.6 mm40鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ HDD connector ）PCB PadStencil Aperture0.71mm (W)2.387mm (L)2.587mm0.7mm0.57mm外擴(kuò)15%倒R角1.09mm0.185mm倒R角0.95mm1.7mm41鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ ODD connector ）PCB PadStencil Aperture1.06mm0.2mm1mm0.27mm1. 5mm0.28mm1

19、. 6mm0.91mm0.28mm1.31mm1.2mm1.1*1.1mm0.65mm倒R角倒R角42鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Phone jack connector）PCB PadStencil Aperture1.8 mm2 mm0.55 mm1.5 mm倒R角43鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Battery connector ）PCB PadStencil Aperture1.4 mm1.6 mm2 mm外擴(kuò) 40%倒R角44鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ FPC connector ）PCB PadStencil Aperture1.65 mm1.55 mm (L)0.3 mm

20、(W)PAD 長(zhǎng)度方向（L）外擴(kuò)0.15mm，內(nèi)切0.05mm固定PAD1:1 開(kāi)0.23mm0.27mm固定PAD1:1 開(kāi)0.27mm1.85 mm (L)0.38 mm (W)0.5mm倒R角倒R角45鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ BTB connector ）PCB PadStencil Aperture2 mm0.76 mm0.25 mm0. 6 mm0.2 mm1.95 mm0.3 mm長(zhǎng)度(L)方向外擴(kuò)0.25mm，內(nèi)切0.3mm 倒R角46鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Card reader connector ）PCB PadStencil Aperture3mm2.38mm

21、2.7mm (L)0.46mmGAP 0.18mm0.56mm3.15mm3.5mm2.78mm0.6mm0.6mm長(zhǎng)度(L)方向外擴(kuò)0.45mmGAP 0.4mmGAP 0.38mm47鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Spring ）PCB PadStencil ApertureLW0.25mm0.5mm +W0.5 mm + L48鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ NUT ）PCB PadStencil Aperture3.24mm0.5mm7.5mm2mm2mm2.74mm1.85mm0.5mm7.95 mm5.1mm1.45mm49鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Fuse ）PCB PadStencil ApertureLW1/3L1/3WLLWLW1/3WW1/3L50鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Choke ）PCB PadStencil Aperture6.3 mm (L)2.16 mm (W)6.3 mm2.06 mm0.4mm1/3 L1/3 W4.6 mm (L)3.81 mm (W)0.254 mm 2.2 mm 5.2 mm0.3 mm1/3 LW51鋼板開(kāi)口設(shè)計(jì)（鋼板開(kāi)口設(shè)計(jì)（ Tantalum/Electrolytic Cap ）PCB PadStencil Aperture3.5 mm (L)1.8 mm (W)3.5 mm