60606-01-COMPAL(DSO751_異物附著).doc

FAILURE ANALYSIS REPORT PRODUCT TYPE DSO751SV CUSTOMER NAME COMPAL PREPARED BY： QA. ENGINEER： VINCENT LIU 2006/6/6 APPROVED BY： QA. A. MANAGER： ANDY CHEN 2006/6/6 PRODUCT INFORMATION CUSTOMER：COMPAL SPEC NO.：1XSA048000AV14 PART NO.：SJ048P0M300 TYPE：Oscillator SMD DSO751SV FREQ：48.0000MHz, 3.3V DATECODE：6B （H. ELE） TEAM MEMBERS QA Brian Li / Vincent Liu RD Zoe Li / Keven Wang / F.S. Tsai MFG C.Y. Yen / S.F. Weng / W.C. Yen SALES Edison Wang DESCRIBE THE PROBLEM Failure symptom: the frequency of OSC. Failed model: HTW2E?Toshiba Failure samples: 1pcs D/C=6B VERIFIED THE ROOT CAUSE OSC functions check by manual tester Result OSC FAIL (output frequency 80MHz) Shown as below De-cap 【External materials adhered onto the electrode】 DLD sweep for crystal blank Impedance sweep for crystal blank 【3rd-OT Waveform】 【5th-OT Waveform】 ■ 3rd-OT impedance high (104.4Ω)…FAIL ■ Due to 3rd-OT impedance value was closing with 5th-OT to cause frequency jumped. Root Cause Foreign materials adhered onto the electrode. 【Incidence】No OSC, Start-Up, Dev-FR, Frequency jump INTERIM ACTIONS All of affected products as below inventory list. STORE D/C Q’TY HPFK - 0pcs SFT - 0pcs PERMANENT ACTIONS Following actions will be running in BP station. ? N2+Ion blow process adding into the BP station. VERIFICATION OF EFFECTIVENESS 【REFERENCE】 PREVENT RECURRENCE QIT team will keep following this action and effect for external material attached prevention. To educate operators for relative operations and standards by periodic. 1 6 N2+Ion Blow Basic Plating [Ag] 1.8V 基本頻發振 16M 2 MASK+BLANK Assembling 3 1 3.3V 5倍頻發振 80M MASK for Use