失效分析报告英文版模板
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Component Failure Analysis Report
Device: BCM4322KFBG
Manufacture:XXXX
Document number: 2010FA08A01
Date: Aug.23th. 2010
Approved: Checked: Prepared:
Component Failure Analysis Request Form Check list Description of Component and Product:
Component p/n:
0405-00074322R Description:
ROHS IC RF BASEBAND+MAC+PHY+RADIO 802.11n 1.2V TFBGA182 BCM4322KFBG BROADCOM Vendor:
BROADCOM Model Name:
E3000 MO no:
N/A Location: U15
Description of Failure Rate:
Return from:
RE Repair Total fail Qty:
538pcs Assembly Qty:
472,473pcs Defect rate:
1138 Dppm Sample Qty for FA: 3pcs
Description of Failure:
De vice NO. Lot code Week code Error co de Description Pictu re
1 963216 TG1009 RM50
2 967036 TG1012 RM50
11n 5G 20M RF mask test failed.
(Error point>>spec_5)
3 964908 TG1010 RP31 5G Channel 36 Ant0 Actual power
below 11dB,out of the SPEC .
The spec is 12.5±1.5;
Failure Analysis:(Board Level)
1 Identify the Problem The failure can be duplicated at RF test station
Device NO.
PwrCal_11a_test PwrChk_11a_test Mask_11n_5G_20M_Ch149_MCS0_ErrPoint
1
Pass Pass Fail (Errpoint_329>>Spec_5) 2 Pass
Pass Fail (Errpoint_344>>Spec_5)
3
Fail
(5G channel 36
actual power
4.67<<Spec_11) N/A N/A 2 Duplicate Failure (Re-FT test at different ATE tester) Retest on another ATE tester, and the failure can be duplicated.
3 Analysis & Result
3.1.Visual inspection: check if anything wrong at board.
No abnormal was found.
3.2.Electric Analysis:
3.2.1->Connecting output signal and input Power, and check power level is correct and no spike voltage and if component related surge and ripple current, please confirm surge and ripple current.
a.All the VCC are right, Such as 5V, 3.3V, 2.5V, 1.8V, 1.2V, No abnormal was found.
b.Measure XTAL (20MHz&25MHz) and SDRAM_CK (240MHz) were normal
3.2.2->Run ATE program if need.
Having the board retested in throughput test station, the failure can be duplicated 3.2.3->Check output and input signal check by scope and provide the Waveform.
We cannot measure any abnormal waveform by oscillograph.
3.2.4-> Check Mask_11n_5G_20M_Ch149 with spectrum analyzer.
Good Sample Mask_11n_5G_20M_Ch149 as below:
Datum line
Signal of input
Good sample mask
NG Sample 1 Mask_11n_5G_20M_Ch149 as below:
NG Sample 2 Mask_11n_5G_20M_Ch149 as below: Signal of input Datum line
NG sample 1 mask
NG sample 2 mask
Datum line
Signal of input
3.2.5->Check error vector magnitude with tester Good Sample EVM_11n_5G_20M_Ch149 as below:
NG Sample 1 EVM 11n_5G_20M_Ch149 as below:。
