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A sensitivity-enhanced temperature sensor for marine monitoring based on fiber Bragg grating (FBG) has been proposed and experimentally investigated. The temperature sensor has been realized by electroplating a copper coating on a metalized FBG. Then, the coated FBG is packaged by a carbon film, which protects the copper coating from being corroded when the sensor is used in the ocean. The carbon...
Pretreatments have a great effect on the through silicon via (TSV) copper electroplating filling process. In this study, we compared the wetting effect by observing cross-sectional images of samples pretreated with ultrasound and vacuuming method. And the electrochemical test was used to verify the effect of acid plating solution on the oxidation of the Cu seed layer. Without any pretreatment, vias...
This paper addresses several challenges in the formation of an Au cantilever taking Cu as a sacrificial layer. With respect to the Cu wet etch process, an etchant containing HAC and H2O2 works most effectively in anchor corrosion process and an etchant involving FeCl2 and HCl achieves better performance in the Cu sacrificial layer release process. Moreover, we probe into the wrinkle phenomenon of...
The goal of this study is to model the electrical response of gold plated copper electrical contacts exposed to a mixed flowing gas stream consisting of air containing 10ppb H2S at 30degC and a relative humidity of 70%. This environment accelerates the attack normally observed in a light industrial environment (essentially a simplified version of the Battelle class 2 environment). Corrosion rates...
Lead frame is the primary package metallurgical bond pad interface in microelectronic devices which provides external interconnection. The most predominant lead frame material is copper with tin plating. Over the years, galvanic corrosion and copper oxidation are two main reliability concerns for any microelectronics packages with copper lead frame, when operating under high humidity environment....
In last few years, some transmitted type fiber optic corrosion sensors (FOCS) have emerged, but the fragile character makes them difficultly use in practice. In this paper, a novel thin Fe-C alloy solid film based fiber optic corrosion sensor has been developed. The sensing section is located at one end of the fiber. A double layer classic slab model has derived. According to the model, the change...
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