A new high-voltage H2S single noxious gas reliability test for power modules

Wassermann, T.N.; Schilling, Oliver; Müller, K.‐H.; Rossin, A.D.; Uhlig, J.

doi:10.1016/j.microrel.2019.113468

Cited by 8 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was also calculated that it takes four days for the H 2 O to reach equilibrium at 60 ºC. Wassermann et al [1] have shown that increased humidity has an impact on the corrosion behaviour of electronics in a single gas testing, where a higher humidity generated larger dendrite structures under, otherwise, the same conditions. Therefore, a 90% relative humidity was chosen instead of 70% as specified in the standard [14].…”

Section: B Standards Related To Corrosive Gas Testingmentioning

confidence: 99%

“…In these industries, the amount of atmospheric sulphur in the environment has a big impact on the lifetime of the frequency converter. Critical components, such as power modules [1], electrical contacts and thick film resistors are affected by corrosion due to the sulphur in the environment. In these electrical components, corrosion phenomena, such as electrochemical migration [1][2][3] and open connection [4,5], have been reported.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detection of Corrosion in Thick Film Resistors by X-Ray Imaging

et al. 2021

View full text Add to dashboard Cite

In this article, a non-destructive method, using 2D X-ray imaging, to investigate corrosion defects in thick film resistors stressed by two different corrosion experiments, the single gas experiment and the flowers of sulphur experiment, is presented. In total, 370 devices under test (DUTs) were investigated, using the 2D X-ray imaging technique, of which 10 were imaged in a sequence of 2D X-ray images to evaluate the corrosion propagation. The observed underlying corrosion product was verified by using focused ion beam analysis combined with an energy dispersive X-ray spectroscopy. The presented 2D Xray imaging technique enables a fast and non-destructive method for accurately identifying corrosion and corrosion progression in thick film resistors. The presented imaging method was found to be especially suitable for supplier benchmarking purposes as well as for failure analysis of field returns as it allows for proper corrosion evaluation of surface mount thick film resistors while keeping the analyzed assembly intact.

show abstract

Section: B Standards Related To Corrosive Gas Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection of Corrosion in Thick Film Resistors by X-Ray Imaging

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The ceramic is widely used for high-voltage power module packaging insulation in power electronic industries [2]. However, their long-term exposure to environments with a high content of humidity such as seaward wind power station is prone to flashover due to high hydrophilicity, seriously constricting their applications [3]. Worse still, the wet flashover voltage is lower than the dry flashover one resulting in more hazards [4,5].…”

Section: Introductionmentioning

confidence: 99%

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Huang

Xie²,

Zhou

et al. 2023

Plasma Sci. Technol.

View full text Add to dashboard Cite

Surface modification techniques with plasma are widely investigated to improve the surface insulation capability of polymers under dry conditions, while the relationship between treatment method, surface physical and chemical properties, and wet flashover voltage is still unclear for inorganic ceramics. In this paper, the surface insulation properties of ceramics under wet conditions are improved using nanosecond-pulsed dielectric barrier discharge with PDMS as the precursor. The relationships between PDMS concentration and the water contact angle, dry and wet flashover voltages are obtained to acquire the optimal concentration. The surface charge dissipation test and surface physio-chemical property measurement with SEM, AFM, XPS are carried out to further explore the mechanism of surface insulation enhancement. The results show that film deposition with micron thickness and superhydrophobicity occurs at the PDMS concentration of 1.5%. The dry flashover voltage is increased by 9.6% due to the induction of deep traps, while the wet flashover voltage is increased by 66.7%. The gap between dry-wet flashover voltage is decreased by 97.4% compared with the untreated one due to the self-cleaning effect.

show abstract

“…For corrosion products related to ionic contamination, the situation is different and rather complex. If moisture and atmospheric pollutants like sulphur dioxide (SO2) or hydrogen sulphide (H2S) are present, copper-sulphidedendrites are formed in the insulation trenches on the copper-ceramic-substrate [4,5], leading to ohmic conduction paths between the copper pads. Under dry DC-conditions, the leakage current of the chip conceals the parasitic current through the dendrites and therefore, no sulphur related degradation can be measured [5].…”

Section: Introductionmentioning

confidence: 99%

Sulphur related Corrosion in Power Modules and its Impact on the Switching Performance

Hanf,

Schnell,

Matthias

et al. 2023

ISPS'23 Proceedings

View full text Add to dashboard Cite

High power semiconductor modules, exposed to polluted (i.e. H2S) and moist climates can experience corrosion at the packaging materials. Sulphur and copper will form Cu2S-dendrites in the insulation trenches of the substrates, which are able to short the insulation distance. But, previous experiments pointed out, that modules with excessive dendrite growth are able to withstand high blocking voltages under DC-bias. While most IGBTs will operate under switching operation with fast transients, ohmic connections at insulation distances will change the situation tremendously. For this study, 1200 V silicon-IGBT-modules in a standard package were preconditioned in an accelerated corrosive gas test and will be operated in a switching test bench to verify corrosion related performance issues in active operation.

show abstract

A new high-voltage H2S single noxious gas reliability test for power modules

Cited by 8 publications

References 5 publications

Detection of Corrosion in Thick Film Resistors by X-Ray Imaging

Detection of Corrosion in Thick Film Resistors by X-Ray Imaging

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Sulphur related Corrosion in Power Modules and its Impact on the Switching Performance

Contact Info

Product

Resources

About