Surface condensation sensor board for damp heat chamber.

Rev Sci Instrum

R&D Reliability Department, Lumentum Inc., 400 N. Mc Carthy Blvd., Milpitas, California 94560, USA.

Published: September 2019

In this paper, we demonstrate the use of a surface condensation sensor board for characterizing interior space in a damp heat chamber. The sensor board is approximately 18 in. × 12 in. in dimension. A total of 324 sense electrodes are designed on the board. The uniform gap between the sense electrodes is 250 μm throughout the surface area of the board. First, the surface leakage current of the sensor board is characterized with other commercially available humidity sensors. The relationship of leakage current to humidity is determined. Surface leakage current is spatially measured inside the chamber, and localized condensation spots are identified at 85 °C/85%RH stress condition. The main goal of this article is to characterize interior space and identify less-risky locations prior to qualification of semiconductor components, optical subassemblies, and optical modules.

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http://dx.doi.org/10.1063/1.5100745DOI Listing

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