8D改善案例参考

FAILURE ANALYSIS REPORTOF 8DsPRODUCT TYPE DSO751SVCUSTOMER NAMEXXXXPREPARED BY：QA. ENGINEER：VINCENT LIU2006/6/6APPROVED BY：QA. A. MANAGER：ANDY CHEN2006/6/6 PRODUCT INFORMATIONCUSTOMER：XXXXXXSPEC NO.：1XSA048000AV14PART NO.：SJ048P0M300TYPE：Oscillator SMD DSO751SVFREQ：48.0000MHz, 3.3VDATECODE：6B （H. ELE）1. TEAM MEMBERS （成立小组）QABrian Li / Vincent Liu RDZoe Li / Keven Wang / F.S. TsaiMFGC.Y. Yen / S.F. Weng / W.C. YenSALESEdison Wang2. DESCRIBE THE PROBLEM （问题描述）2.1 Failure symptom: the frequency of OSC.Failed model: HTW2EToshibaFailure samples: 1pcsD/C=6B3. INTERIM ACTIONS （ICA-临时措施）3.1 All of affected products as below inventory list.STORED/CQTYHPFK-0pcsSFT-0pcs4. VERIFIED THE ROOT CAUSE（定义根因）4.1 OSC functions check by manual testerResultOSC FAIL (output frequency 80MHz)Shown as below1.8V 基本頻發振 16M3.3V 5倍頻發振 80M4.2 De-cap213【External materials adhered onto the electrode】4.3 DLD sweep for crystal blank4.4 Impedance sweep for crystal blank【3rd-OT Waveform】 【5th-OT Waveform】 3rd-OT impedance high (104.4)FAIL Due to 3rd-OT impedance value was closing with 5th-OTto cause frequency jumped.4.5 Root CauseForeign materials adhered onto the electrode.Incidence】No OSC, Start-Up, Dev-FR, Frequency jump5. PERMANENT ACTIONS （永久纠正措施-PCA）5.1 Following actions will be running in BP station. N2+Ion blow process adding into the BP station.MASK for UseMASK+BLANKAssemblingBasic Plating AgN2+Ion Blow6. VERIFICATION OF EFFECTIVENESS （实施与确认PCA）【REFERENCE】双击下图所附文档！7. PREVENT RECURRENCE （预防措施-防止再发）7.1 QIT team will keep following this action and effect for externalmaterial attached prevention.7.2 To educate operators for relative operations