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Page:1Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0MuraIntroductionPage:2Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Content:1.何謂Mura2.Mura的成因3.Mura的檢驗方法4.各種MuraPage:3Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0何謂Mura?何謂Mura?在同一光源且相同底色之畫面下,因視覺感受到不同程度之顏色差異稱之為Mura。Page:4Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0為何會有Mura產生?LCDMonitor主要的顯示原理:由一薄膜電晶體【TFT】來控制液晶【LC】旋轉的角度,再經由光源【B/L】透過不同角度排列之液晶所穿透之光源透過彩色濾光片【CF】顯示出不同的顏色組合。Mura的產生理由主要是因為視覺上對於感受到的光源有不同的頻率響應而感覺到顏色的差異。造成mura的原因:【1】CF製程【2】TFT製程【3】LCD製程【4】LCM製程Mura的成因Page:5Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0為何會有Mura產生—就CF製程而言膜厚—因為膜厚的Coating不均,導致產生色不均之現象。Coating—光阻於coating時若噴嘴有阻塞的情況,即會造成verticalmura。Mura的成因Page:6Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Over-lap—TFT的主要構成為層與層之間的關關相連,若某一層當中有shift的情況產生就會產生異常,可能影響TFT的特性而造成Mura。為何會有Mura產生—就TFT製程而言Mura的成因Page:7Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0為何會有Mura產生—就LCD製程而言Cellgap—cellgap的不均,偏高或偏低階會造成mura的現象。Spacer—spacer散佈的均勻性及spacer本身原材料的均勻性都有可能影響mura的產生。Roller—因機台roller的壓力過大或是roller上沾附異物,造成panel經過roller後而產生丸狀或條狀mura。Stage—因機台stage吸力過大而造成吸附後形成stagemura,或stage的平整度不佳當經過製程機台後,亦有可能產生相關性的mura。Mura的成因Page:8Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0為何會有Mura產生—就LCM製程而言Roller—因機台roller的壓力過大或是roller上沾附異物,造成panel經過roller後而產生丸狀或條狀mura。Vacuum—因機台stage吸力過大而造成吸附後形成stagemura。Black-light—B/L本身Film材不良或其他來料造成異常亦會形成mura現象,通常以交叉驗證等方式確認B/L是否有異常現象。Polarizer—偏光板本身來料不良,造成偏貼後形成Mura,通常更換偏光板後即OK。Mura的成因Page:9Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0為何會有Mura產生—就人為因素而言不當拿取—因拿取Panel方式不當,手指按壓到面板的力量過大,易造成丸狀mura。Mura的成因Page:10Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Mura的判定Mura的判定通常於50%Graypattern畫面判定,其judge的方式可採用limitsampleorNDfilter。NDFilter--ND為在可見光波常範圍下能提供相當穩定平穩的響應,主要功能在於降低光源之透光率。Page:11Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0使用10%ND檢驗Mura仍清楚可見使用8%ND檢驗Mura較不明顯使用6%ND檢驗Mura不可見ND的使用Page:12Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0各種MuraPage:13Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0各種MuraSymptom:ArchMuraDescription:50%灰階畫面在Panel上方可見。Defectphoto:Symptom:AroundStripMuraDescription:位置於邊框四周或任一側色差。Defectphoto:Page:14Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:CircleMuraDescription:可分較畫面深的黑丸mura及較畫面淡的白丸mura。Defectphoto:Symptom:CloudMuraDescription:局部區域雲狀不均。Defectphoto:各種MuraPage:15Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:CoinMuraDescription:固定位置之圓形凹陷狀Mura。Defectphoto:Symptom:Col/Mu(Columnmura)Description:1.50%灰階畫面可看見Panel邊緣有一寬約7~10mm白色或黑色帶狀mura。2.白色畫面下視角可以較明顯看出。Defectphoto:各種MuraPage:16Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:CornerMuraDescription:5%&50%grayscalepattern可見角落處mura。Defectphoto:各種MuraSymptom:DiagonalMuraDescription:50%灰階畫面可看見斜向帶狀Mura。Defectphoto:Page:17Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:FillPortGapDescription:1.50%灰階畫面可看到Panel在注入口處附近局部偏白(Gap過大)。2.白色畫面可看到Panel在注入口處附近局部偏黃(Gap過大)。Defectphoto:Symptom:HmoonGap(Sidehalfmoongap)Description:1.50%灰階畫面可看到Panel邊緣有半圓形局部偏白。2.白色畫面可看到Panel邊緣有半圓形局部偏黃。Defectphoto:各種MuraPage:18Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:InjectionPortMuraDescription:注入口部分較畫面深的半圓形mura。Defectphoto:Symptom:LCnotfullDescription:1.各種畫面或不需驅動即可看到Panel注入口處對側局部變黑。2.無畫面(完全無液晶)。Defectphoto:各種MuraPage:19Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:RingMuraDescription:一圈圈均勻的色差圓。Defectphoto:Symptom:RowMuraDescription:50%gray畫面水平方向線狀mura。Defectphoto:各種MuraPage:20Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:RainMuraDescription:50%gray判定,下雨似的色差。Defectphoto:Symptom:SpacerClusteringDescription:黑畫面可看見因spacer聚集所產生的mura。Defectphoto:各種MuraPage:21Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:TABMuraDescription:一整條TAB範圍均勻的較深或較淺色差。Defectphoto:Symptom:TwillLineDescription:均勻的實斜線。Defectphoto:各種MuraPage:22Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0Symptom:TwilllinesorrubbinglineDescription:區域性斜線。Defectphoto:Symptom:VerticalMuraDescription:DriverIC與TFT匹配問題。Defectphoto:各種MuraPage:23Preparedby:CSDanielUpdated:2/15/2020PrintedDate:2/15/2020Rev.1.0SymbolofQualityThankYou
本文标题:Mura 产生原因
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