如何降低噴錫后防焊白化的現(xiàn)象

1、如何降低噴錫后防焊白化 專(zhuān)題成員   姓名職稱(chēng) 學(xué)歷 組長(zhǎng)：劉益利副工程師大   學(xué) 組員：張啟煌副工程師專(zhuān)   科 王玉琪現(xiàn)場(chǎng)組長(zhǎng)專(zhuān)   科 皮賢明現(xiàn)場(chǎng)組長(zhǎng)專(zhuān)   科 李志清現(xiàn)場(chǎng)組長(zhǎng)專(zhuān)   科 1.前言:   隨著客戶(hù)對(duì)PCB的質(zhì)量要求越來(lái)越嚴(yán)格，相對(duì)地在外觀上也越來(lái)越要求完美。所以電路板廠無(wú)不在原物料、機(jī)械設(shè)備、制作條件上，想盡各種方法來(lái)改善，以滿(mǎn)足客戶(hù)需求。良好的外觀質(zhì)量，更能取得客戶(hù)的信賴(lài)，以奠定后續(xù)定單能源源不絕。2.選題理由:   防焊油墨在噴錫后產(chǎn)生白

2、化現(xiàn)象，雖然于功能上不影響，但是在外觀上出現(xiàn)瑕疵，使得客戶(hù)產(chǎn)生疑慮，甚至不允收。所以利用DOE的手法找出最佳生產(chǎn)條件，以降低防焊油墨在噴錫后產(chǎn)生白化現(xiàn)象。 3.質(zhì)量問(wèn)題現(xiàn)況分析: 月 份-3 7月-2 8月-1 9月0 10月1 11月2 12月3 1月白  化 不良率0.0513 (5.13%)0.0484 (4.84%)0.0324 (3.24%)0.0312 (3.12%)0.0171 (1.71%)0.0025 (0.25%)(0指開(kāi)始作專(zhuān)題之月份) 4.制程說(shuō)明:   防焊前處理印刷預(yù)烤曝光顯影后烘烤噴錫前處理IR預(yù)熱浸Flux噴錫浮床噴錫后清洗出料檢視因本廠出現(xiàn)

3、防焊白化以Curtain Coating比例較高，因此選擇以Curtain Coating印刷方式找出白化成因。   5.特性要因分析:   6.第一階段實(shí)驗(yàn)配置及解析:   6.1實(shí)驗(yàn)因子及水平對(duì)照表:6.2配置方式及交互作用:   6.2.1采L16215方式配置 6.2.2點(diǎn)線圖:6.3實(shí)驗(yàn)解析(1)白化 6.3.1防焊特性(1)白化實(shí)驗(yàn)配置及數(shù)據(jù):   FACTORABABFIDADCACeGHAHIGFGDATAROW/COL1234567891011121314153111111111111111142111111122222222

4、031112222111122228411122222222111110512211221122112296122112222112211071222211112222110812222112211112229212121212121212110212121221212121811212212112122121712212212121211212513221122112211221614221122121122112115221211212212112016221211221121221  6.3.2防焊特性(1)白化實(shí)驗(yàn)平均值比較表：   COLFACTORSIAVE(L

5、1)AVE(L2)1A14.253.752B0.254.1253.8753AB6.253.3754.6254C16535F255.252.756J110.251.3756.6257H0.254.1253.8758D2.253.6254.3759I6.253.3754.62510G43.54.511K93.254.7512CD2.254.3753.62513JK6.254.6.253.37514HI44.53.515FG14.253.75 6.3.3防焊特性(1)白化變異數(shù)分析: ANOVA：在合并后   FACTORSiDFVF(%)J110.251110.2538.587555.3

6、571*F251258.7511.4138*C161165.66.77466*K9193.153.16642AB6.2516.252.18751.71889I6.2516.252.18751.74889A1110.350.95729B0.2510.250.08751.34388e2072.85714217.4889St=194t=82.5110 6.3.4防焊特性(1)白化貢獻(xiàn)率分析:   J (板溫)E (曝光能量)C (預(yù)烤溫度)K (水洗溫度)ABI (后烤溫度)A (下墨量)B (油墨黏度)E (誤差值)貢獻(xiàn)率55.36%11.41%6.77%3.17%1.75%1.75%0

7、.96%1.34%17.49%累積 貢獻(xiàn)率55.36%66.77%73.54%76.71%78.46%80.21%81.17%82.51%100.00% 6.4實(shí)驗(yàn)解析(2)壓痕 6.4.1防焊特性(2)壓痕實(shí)驗(yàn)配置及數(shù)據(jù): FACTORABABFIDADCACeGHAHIGFGDATAROW/COL123456789101112131415211111111111111111211111112222222203111222211112222041112222222211111.551221122112211221.561221122221122110712222111122221108122

8、2211221111228921212121212121210102121212212121213112122121121221210.5122122121212112127132211221122112218.5142211221211221121152212112122121122.5162212112211212216.4.2防焊特性(2)壓痕實(shí)驗(yàn)平均值比較表： COLFACTORSIAVE(L1)AVE(L2)1A74.390620.755.06252B0.3906253.06252.753AB0.3906252.753.06254C66.015624.93750.8755F26.26

9、5621.6254.18756J0.3906253.06252.757H0.3906252.753.06258D0.1406252.812539I0.7656253.1252.687510G1.2656253.18752.62511K0.3906252.753.062512CD1.8906252.68753.12513JK1.8906253.252.562514HI0.7656252.68753.12515FG1.8906253.252.56256.4.3防焊特性(2)壓痕變異數(shù)分析:   FACTORSiDFVF(%)A74.39062174.39062144.272741.948

10、3*C66.01562166.01562128.030337.1927*F26.26562126.2656250.9393914.6215*JK1.89062511.8906253.6666660.78076FG1.89062511.8906253.6666660.78076G1.26062511.2656252.4545450.42587K0.39062510.3906250.7575750.07097J0.39062510.3906250.7575750.07097e3.60937570.5156254.10788St=176.1093t=95.8921 6.4.4防焊特性(2)壓痕貢獻(xiàn)率

11、分析: A (下墨量)C (預(yù)烤溫度)F (曝光能量)JKFGG (靜置時(shí)間)K (水洗溫度)J (板溫)E (誤差值)貢獻(xiàn)率41.95%37.19%14.62%0.78%0.78%0.43%0.07%0.07%4.11%累積貢獻(xiàn)率41.95%79.14%93.76%94.54%95.32%95.75%95.82%95.89%100.00% 6.5實(shí)驗(yàn)解析(3)銅面氧化 6.5.1防焊特性(3)銅面氧化實(shí)驗(yàn)配置及數(shù)據(jù):   FACTORABABFIDADCACeGHAHIGFGDATAROW/COL1234567891011121314153111111111111111122111

12、11112222222243111222211112222541112222222211112512211221122112256122112222112211271222211112222114812222112211112209212121212121212010212121221212121011212212112122121012212212121211212013221122112211221014221122121122112115221211212212112016221211221121221 6.5.2防焊特性(3)銅面氧化實(shí)驗(yàn)平均值比較表   COLFACTORS

13、IAVE(L1)AVE(L2)1A42.253.3750.1252B01.751.753AB0.251.8751.6254C11.525F0.251.6251.8756J11.527H2.251.3752.1258D11.529I2.251.3752.12510G121.511K2.252.1251.37512CD01.751.7513JK0.251.8751.62514HI121.515FG0.251.8751.625 6.5.3防焊特性(3)銅面氧化變異數(shù)分析:   FACTORSiDFVF(%)A42.25142.25147.87576.2987*I2.2512.257.875

14、3.57142*H2.2512.257.8753.57142*K2.2512.257.8753.57142*C1113.51.29870D1113.51.29870G1113.51.29870J1113.51.29870e270.2857147.78220St=55t=92.20776.5.4防焊特性(3)銅面氧化貢獻(xiàn)率分析: A (下墨量)I (烘烤溫度)H (后烤時(shí)間)K (水洗溫度)C (預(yù)烤溫度)D (預(yù)烤時(shí)間)G (靜置時(shí)間)J (板溫)E (誤差項(xiàng))貢獻(xiàn)率76.30%3.57%3.57%3.57%1.30%1.30%1.30%1.30%7.79%累積貢獻(xiàn)率76.30%79.87%8

15、3.44%87.01%89.00%89.61%90.91%92.21%100.00%      7.Cross Table 因子特性質(zhì)ABCFJHDIGK結(jié)論防焊白化C2F2J11.A2、B2、C2、F2、J1、H1、I1、G1、K2為 Cross Table分析后之較佳條件，其中遇多特 性質(zhì)，有沖突時(shí)以其貢獻(xiàn)率%來(lái)取舍。 2.本次實(shí)驗(yàn)之二面多特性質(zhì)經(jīng)分析后，第二階 段實(shí)驗(yàn)中取A2、B2、D1、H1、I1、G1、K2 為常數(shù)項(xiàng)，C、F、J三因子為繼續(xù)做第二階 段實(shí)驗(yàn)。 3.本次實(shí)驗(yàn)之二個(gè)多特性質(zhì)經(jīng)分析后，顯著因 子無(wú)交互作用。顯著性*貢獻(xiàn)率6.77%11.41%5

16、5.36%底片壓痕A1C2F1顯著性*貢獻(xiàn)率41.95%37.19%14.83%銅面氧化A2H1I1K2顯著性*貢獻(xiàn)率76.3%3.75%3.75%3.75%結(jié) 論A2C2F2J1H1I1K2  8.第二階段實(shí)驗(yàn)配置及解析:   8.1計(jì)劃構(gòu)想: 由Cross Table結(jié)論得知C、F、J為顯著因子,希望在第二階段少因子多水平中尋找出最佳量產(chǎn)條件   8.2因子水平對(duì)照表:因子代號(hào)水平交互作用123預(yù)烤溫度CC21C22C23曝光能量FF21F22F23噴錫后處理前板溫JJ21J12J13   8.3點(diǎn)線圖:8.4實(shí)驗(yàn)常數(shù):1.下墨量 5. 后烘烤溫度

17、2.油墨黏度 6. 曝光靜置時(shí)間 3.預(yù)烤時(shí)間 7.噴錫后水洗溫度 4.后烘烤時(shí)間 8.5第二階段實(shí)驗(yàn)防焊噴錫后白化實(shí)驗(yàn)配置及數(shù)據(jù):   factorJFeeCeeeeeeeedataROL/COL1234567891011121301223123131212302212312312312303111111111111104122222233311105212323123123106133333322211107321321332113208111133333333309111122222222201023122311233120113321213132321012321332113

18、2213013223112323131201412223331112220152231312123231016231231223112301721233123123120183321321213132019122211122233302013332221113330211333111333222022332113232121302331322132132130242312123312231025321313221332102631323213213210273132132132132 8.6防焊噴錫后白化實(shí)驗(yàn)變異數(shù)分析:   FACTORSiDFVF(%)C020J020F020e0

19、200St0t= 8.7第二階段實(shí)驗(yàn)防焊曝光底片壓痕實(shí)驗(yàn)配置及數(shù)據(jù):   factorJFeeCeeeeeeeedataROL/COL123456789101112130122312313121230221231231231230311111111111112412222223331110521232312312311613333332221111732132133211321811113333333330911112222222221102312231123312111332121313232101232133211322132132231123231312014122233311

20、12221152231312123231016231231223112321721233123123121183321321213132119122211122233302013332221113331211333111333222122332113232121302331322132132130242312123312231025321313221332112631323213213211273132132132132 8.8防焊曝光底片壓痕實(shí)驗(yàn)變異數(shù)分析:   FACTORSiDFVF(%)F0.66666620.3333330.666662.77777J0.66666620.3

21、333330.666662.77777C0.66666620.3333330.666662.77777e10200.5St=12t=8.33333 8.9第二階段實(shí)驗(yàn)防焊下銅面氧化實(shí)驗(yàn)配置及數(shù)據(jù):   factorJFeeCeeeeeeeedataROL/COL123456789101112131.1122312313121231.1221231231231231.2311111111111111.2412222223331111.1521232312312311.1613333332221111.1732132133211321.1811113333333331.291111222

22、2222221.21023122311233121.21133212131323211.11232133211322131.21322311232313121.114122233311122211522313121232311.11623123122311231.21721233123123121.21833213212131321.11912221112223331.120133322211133312113331113332221.12233211323212131.12331322132132131.12423121233122311.12532131322133211.22631323

23、213213211.2273132132132132 8.10防焊下銅面氧化變異數(shù)分析:   FACTORSiDFVF(%)F0.00962920.0048141.192661.61538J0.00518520.0025920.642203C0.00074020.0003700.091747.61538e0.080740200.00403787.7692St=0.096296t=12.2307  9.第二階段實(shí)驗(yàn)結(jié)論: 操作條件對(duì)照表實(shí)驗(yàn)因子因子代號(hào)原始作業(yè)條件最佳作業(yè)條件下墨量AA1±20g/m2A2±20g/m2油墨黏度BB1±10secB

24、2±15sec預(yù)烤溫度CC1±2.5C2±5預(yù)烤時(shí)間DD1D2曝光能量FF1±50mj/cm2F2±100mj/cm2曝光后靜置時(shí)間GG1G1后烘烤時(shí)間HH1H1后烘烤溫度II1±10I2±10噴錫后板溫JJ1±10J2±15噴錫熱水洗溫度KK1±10K2±15由第二階段實(shí)驗(yàn)與兩個(gè)多特性質(zhì)分析后,獲得最佳作業(yè)條件        10.再現(xiàn)性結(jié)果確認(rèn)   1、制 程：防焊 2、再現(xiàn)性實(shí)施期間：1999/12/272000/1/9 3、再現(xiàn)性生產(chǎn)記錄： 生產(chǎn)批數(shù)：420批 生產(chǎn)總批數(shù)：100800 Working Panel4、再現(xiàn)性質(zhì)量記錄：1999/12/272000/1/19無(wú)白化現(xiàn)象發(fā)生 5、再現(xiàn)性普及性確認(rèn)： 是