This paper outlines the failure analysis of a Radio Frequency only (RF-only) failure on a complex Multimode Multiband Power Amplifier (MMPA) module, where slightly lower gain was observed in one mode of operation. 2 port S-parameter information was collected and utilized to help localize the circuitry causing the issue. A slight DC electrical difference was observed, and simulation was utilized to confirm that difference was causing the observed S-parameters. Physical analysis uncovered a very visible cause for the RF-only failure.

multimode multiband power amplifier modules, radio frequency, root cause analysis, short circuits
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Copyright © 2013 ASM International. All rights reserved.
2013
ASM International
Topics
Semiconductor wafer fabrication Root cause analysis
Issue Section:
Failure Analysis Process
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