Step1問題定義 /改善主題與目標設定
Problem definition / Improvement subject & Target setup
General Information
NO. | Item | Information |
1 | Customer (Site) | Xuhong |
2 | Panel Source | Hand carry |
3 | RMA No. | NA |
4 | Customer Complain | 反转异常 |
5 | Project Name/AUO Model (Week Code) | G121XN01 V0 (25/08) |
6 | AUO S/N(MFG Site) | 2845C6H1WFZZZS0101 (S01) 1# 2845C6G8FQZZZS0101 (S01) 2# |
7 | Receive/Finish Date | 2025-10-24 / 2025-10-29 |
8 | Receive Q’ty | 2 |
9 | Defect rate | (Still waiting for feedback) |
10 | Customer:1.RA or Aging test 2.Reject site | Line reject |
11 | History | Have No Repair History In MA Process |

Step2 現狀分析
Fact & Data Finding analysis
Failure description

Step3真因分析與驗證
Root cause analysis and verificatio
How :
1. 使用AU治具点亮正常,发现反转异常;

How :
2.确认panel外观无异常;

How :
1. 撕开PET膜,量测到2pcs LR/UD电压都异常;
LR(v) | UD(v) | |
NG1 panel | 0.059 | 0.16 |
NG2 panel | 0.001 | 0.056 |
OK panel | 0.28 | 3.22 |
How :
查询电路图确认反转信号与U103相关;

How :
1. 2pcs外观确认U103无明显异常;

How :
6. 进行交叉实验:
• 1). NG panel + OK U103,反转异常消失
• 2). OK panel + NG U103,反转异常

Summary
1. 使用AU治具点亮正常,发现反转异常;
2. 确认panel外观无异常;
3. 撕开PET膜,量测到2pcs LR/UD电压都异常;
4. 查询电路图确认反转信号与U103相关;
5. 2pcs外观确认U103无明显异常;
6. 进行交叉实验; NG panel + OK U103,反转异常消失;OK panel + NG U103,反转异常
Conclusion
反转异常随U103走,送厂商做进一步分析。
厂商分析
1.对样品进行DE-CAP分析,发现芯片表面有明显烧伤痕迹,为ESD/EOS damage.

友达液晶屏:https://www.hzxuhong.com/auo/