两层贴合保护膜剥离

1、两层贴合撕保护膜问题DRI:Bardeen Yang/ Z_PEReview:Bardeen Yang / Z_PEVersion:V 0.1Status:Preliminary1Change History2原料资料卷号：12C20A04-10AGOCA卷号：R#28 C#63 S#43作业手法拉耳贴上产品手拉拉耳撕掉保护膜4五天后撕去保护膜2013.6.19 五天后撕掉保护膜没有撕不掉的问题。567Root cause analysisFolding machine design reviewCurrent folding machine has bottom datum edge and

2、 right datum edge, but has no flex datum edge. Once the flex RTV glue width shifts to LSL, the folding dimensions will have high risk shifting to LSL caused by the folding machine.Bottom datum Edge and right datum edge,Not Flex datum edgeGlassFlexFlex RTV glue wideFlex RTV glue narrow8Root cause ana

3、lysisFolding lamination method review 3 out of 18 units failed in flex folding GNG but the RTV glue is close to nominal value. Its suspected that the GNG failure was caused by not placing the display close to datum edge of folding machine during folding. Simulated placing the display with different

4、gap between datum edge and display. (see next page for details). The result is that when theres gap between datum edge and display, the folding GNG will fail.NG sample folding demissionNG sample Flex RTV glue demission9Root cause analysis Folding lamination method review different gap simulationsSli

5、ght gapMiddle gapSerious gapMiddle gap10FA Conclusion1 15 out of 18 pcs failures were caused by folding fixture : no Flex datum edge and the RVT glue shit to LSL2 3 out of 18 pcs failures were potentially caused by operator : not follow folding SOP 11Corrective/Preventative Action and PlanningRoot c

6、ause 1:15 out of 18 pcs failures were caused by folding fixture : no Flex datum edge and the RVTglue shit to LSLCorrective Action planning : Add flex datum edge on folding fixture (see belowpreliminary drawing). Need to get approval from Lab/Amazon before implementation12Corrective/Preventative Action and PlanningRoot cause 2:3 out of 18 pcs failures were potentially caused by operator : not follow folding SOPCorrective Action planning : Re-train all of operators for this station to follow SOP carefully and enhance