V88--Top3-Issue-Improvement(改善)-20160531

1、V88 (Starlord 17) Top3 Defect_ Improvement Plan05. 31. 2016Yield Report 日期 DateW14 (4/1- 4/2)W15(4/3-4/9)W16(4/10-4/16)W17(4/17-4/23)W18(4/24-4/30)W19(5/1-5/7)W20(5/8-5/14)Total檢驗總數1494112688418805782603388112446不良數 171 157239 416 101 86 141 1311不良率 11.45%13.94%27.04%22.13%17.47%3.30%3.63%10.53%白點95

2、32224752氣泡 (bubbles)516663238PCB板零件破損7411脫漆1021127異物 (Particle)353778109283751375毛屑000髒污410427381672电测NG (Function NG) 784154173491225432黃影52220741270其他不良611415624畫面異常 (abnormal display)3023210刮傷(TP)241128461469白影 (mura)279431127紅影23211110壓合偏移53513分层 (delamination)000白邊000BKL漏光10214EDID錯誤304141224BK

3、L亮白點2035黑影13116暗點012126 TOP 1 Functional NG0.47%0.53%0.57%0.53%0.52%0.46%0.59%4.75%3.11%5.54%8.67%7.96%0.00%0.05%0.00%1.00%2.00%3.00%4.00%5.00%6.00%7.00%8.00%9.00%10.00%050010001500200025003000350040004500W14W15W16W17W18W19W20New input of the defectsReworked input of the defectsTotal inputNew input

4、defect rateReworked input defect rateTargetAmong this defect phenomenon, 85%- 95% defect are caused by rework process.Check how to improve rework process. Defect Analysis* Description ：TX difference data NG * Analysis: Operator use scraper to clean RTV glue and caused damage on TP film, and lead to

5、ITO race damaged (ITO trace 5mm outside LCM- edge). Action1: * Change clean method of RTV glueMachine/ Average heightOperator/ Scraper Operator/ Tweezer/ Dust free clothOperator/ Scraper/ Back and forth Action2: * Change clean method of RTV glue2.34%3.29%8.82%5.80%4.84%1.42%1.31%0.00%1.00%2.00%3.00%

6、4.00%5.00%6.00%7.00%8.00%9.00%10.00%050010001500200025003000350040004500W14W15W16W17W18W19W20DefectsTotal inputDefect rateTarget TOP 2 ParticleAbnormal: W16 Removed DB line so caused particle increased. Particle check record as fig1. Abnormal: W17 & W18 Lamination station idle time increased to 12 m

7、insFig 1ItemContentOwnerCompletion Date1. Particle check and improvement1.Built SPC. 1)4/22 change filter of oven 062)4/29 change filter of oven 053)5/29 major maintainence of oven 062. Set alert of particle upper limit- Implement date : 6/13Mendyon-going2. Bring down idle time at lamination station

8、Was: 1pc Laminator : 7pcs touch panelNow: 1pc Laminator : 3pcs touch panelGuoqiang5/10Action: TOP 3 Stain 0.27%0.89%0.45%1.44%0.52%0.31%0.41%0.00%0.20%0.40%0.60%0.80%1.00%1.20%1.40%1.60%050010001500200025003000350040004500W14W15W16W17W18W19W20DefectsTotal inputDefect rateTargetAbnormal: W17 The defe

9、ct rate of stain has been under the target value except week 17. Reason：Raw material uneasy to check（0.63%）/ Miss (0.81%）Action： a. Use 3 wave light 4065 to check (DOE data to support?) b. Check under black background = Implement Date: 4/27 (SOP as proof?)Starlord 17 WCD Input dataTOP 3: CMOS hole d

10、irty (7 pcs) / Scratch (3pcs) /Panel stains(2pcs) Input Qty1215769207662Fail rate0.74%0.39%0.34%0.00%Target0.80%0.80%0.80%0.80%WK17WK18WK19WK2012157692076620.74%0.39%0.34%0.00%0.80%0.80%0.80%0.80%0.00%0.10%0.20%0.30%0.40%0.50%0.60%0.70%0.80%0.90%05001000150020002500Input data trend chartStarlord 17 Improvement Action/PlanRegarding to top 3 issues occurred in May1. CMOS hole dirty, Final FA report submitted on Apr/28.2. Scratch on BM area. We doubt thats belong sorting occurred by 3rd party. Meanwhile, YLT will training 3rd party for hand