Effects of humidity on electric field distribution in polyimide insulation in microelectronics applications

With large scale integration in microelectronics, the thickness of insulation between closely spaced conductors at different potentials is reduced to the micrometer range and the electric field in the insulation becomes both a performance issue and a reliability issue. Using the thermal pulse method...

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Bibliographic Details
Main Authors: Bloss, P., De Reggi, A.S., Schafer, H.
Format: Conference Proceeding
Language:English
Subjects:
Conductors
Dielectrics and electrical insulation
Humidity
Large scale integration
Microelectronics
Polyimides
Pulse measurements
Temperature distribution
Thickness measurement
Time measurement
Online Access:Request full text
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Summary:With large scale integration in microelectronics, the thickness of insulation between closely spaced conductors at different potentials is reduced to the micrometer range and the electric field in the insulation becomes both a performance issue and a reliability issue. Using the thermal pulse method, we have measured for the first time the field distribution in 5 /spl mu/m thick polyimide and found complex charging behaviour at ambient temperature and low field (circa 3 V//spl mu/m) representative of operating conditions. Field-independent charge layers are observed on the front surface in addition to injected charge extending deep into the bulk from the polyimide/substrate interface. These effects are considerably influenced by moisture uptake.
DOI:10.1109/CEIDP.1997.634612