欢迎来到天天文库
浏览记录
ID:37664040
大小:888.13 KB
页数:25页
时间:2019-05-28
《电容弯曲断裂如何造成及避免》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、QQuuaalliittyySSuupppoporrttiinnggSSeemmiinnararMLCCBendingCrackStudyYageoElectronics(Dongguan)Co.,Ltd.PDFcreatedwithpdfFactorytrialversionwww.pdffactory.comQQuuiicckkRReeffeerreennceceShSheeteetDefectmodeRealcauseCorrectiveactionremarkNozzleAbnormalAdjustnormalPickup
2、heightofheightofpick-upVisuallyinspectfailurepick-upnozzlenozzleAbnormalAdjustnormalElectricalpropertyofchipPlaceheightofheightofplaceabnormal(IRshort)orChipMechanicalplacepositionpositionbrokenForceAbnormalPrintingnormalElectricalpropertyofchipsolderingpasteoftinabno
3、rmal(IRshortorCout)influenceSolderingprocessorChipbrokenSensitiveImproveprocessofElectricalpropertyofchippositionofbreakPCBorre-abnormal(IRshortorlowIRBreakPCBcomponentlayoutpositionoforCout)orChipbrokencomponentAbnormalImprovereworkElectricalpropertyofchipTemperature
4、reworkmethodandabnormal(IRshortorlowIR)changeThermalmethodorsolderingprocessorinfluenceShocksolderingtemperaturecontrolprocessImproveprocessofElectricalpropertyofchipElectricalOnworkWeakerproductsabnormal(IRshortorlowIRinfluenceenvironmentproductsorCoutevenburnout)PDF
5、createdwithpdfFactorytrialversionwww.pdffactory.comCCononsstrutruccttiioonnooffMMLLCCCCCeramicGreenTerminationsElectrodesSheetPrintedElectrodeElectrodeEndCeramicMaterialPDFcreatedwithpdfFactorytrialversionwww.pdffactory.com範例(Case)PDFcreatedwithpdfFactorytrialversionw
6、ww.pdffactory.comAppearanceonPCBCrack龜裂PDFcreatedwithpdfFactorytrialversionwww.pdffactory.com不良品外觀端電極邊緣外觀上有裂痕PDFcreatedwithpdfFactorytrialversionwww.pdffactory.com剖面內部檢查(DPA)-A內部有龜裂現象PDFcreatedwithpdfFactorytrialversionwww.pdffactory.com剖面內部檢查(DPA)-B內部有龜裂現象PDFcreatedw
7、ithpdfFactorytrialversionwww.pdffactory.com剖面內部檢查(DPA)-C內部有龜裂現象PDFcreatedwithpdfFactorytrialversionwww.pdffactory.com剖面內部檢查(DPA)-D內部有龜裂現象PDFcreatedwithpdfFactorytrialversionwww.pdffactory.comBending不良品內部剖面特徵依產品在印刷電路板受外力彎折的嚴重性可分為下列四種現象Smallandthickchipcapacitors(0603,0
8、805&1206)Smallandthinchipcapacitors(0603,0805&1206)CrackCrackLandpatternLandpatternSolderSolderBoardBoardSmallandmediumthick
此文档下载收益归作者所有