Abstract
The integrated circuit (IC) is electrically connected over several wirebonds to the package pins. Above a certain current level, two or more
wirebonds have to be placed in parallel to minimize the power
dissipation and to guarantee the output resistance of the chip. In case of a fault at one or more of them, the remaining wirebonds have to
carry the current and due to this, the thermal stress is increasing
which is resulting in a shortened lifetime. Because the DUT is used in automobile applications, higher reliability requirements are applying.
The probability of fault detection has to be sufficient high or redundant wirebonds have to be placed, what is increasing the production
costs. This work is a ”Proof of Concept” and shows the possibility
of detecting wirebond faults by measuring the magnetic field distribution above the chip, caused by currents through the wirebonds. The
magnetic field distribution above the chip varies with the
different fault conditions. Prototypes of GMR based sensor arrays were used for measuring the magnetic field. The sensors were produced for
this purpose by Infineon. Furthermore the measured magnetic
field distributions of the fault conditions were compared with a simulation, which was developed on the JKU Linz during a PHD-thesis.
Translated title of the contribution | Measuring the magnetic field distribution above semiconductors for fault detection on wirebonds |
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Original language | German (Austria) |
Publication status | Published - Jul 2015 |
Fields of science
- 202012 Electrical measurement technology
- 202014 Electromagnetism
- 202021 Industrial electronics
- 202024 Laser technology
- 202036 Sensor systems
- 101014 Numerical mathematics
- 102003 Image processing
- 202 Electrical Engineering, Electronics, Information Engineering
- 202015 Electronics
- 202016 Electrical engineering
- 202022 Information technology
- 202027 Mechatronics
- 202037 Signal processing
- 202039 Theoretical electrical engineering
- 207410 Photogrammetry
- 103021 Optics
JKU Focus areas
- Mechatronics and Information Processing