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- W3046597459 abstract "Abstract GaN-based semiconductor devices such as LEDs and power electronic devices are widely used but device fabrication can be further optimized by improving the uniformity and throughput. In inductively-coupled plasma (ICP) etching, the coil can be optimized to produce a tunable plasma distribution to improve the etching uniformity. Different from planar coils, the dual spiral decreases the electric field and magnetic field coupling between the inner and outer coils by enlarging the space without changing the equipment. The vertically arranged coils in each group can independently control plasma generation in the separate zone and tunable etching uniformity can be achieved by varying the power supplied to the inner and outer coils. The etching uniformity is improved from 5.83% to 2.95% based on maximum-minus-minimum (M-N) calculation and from 3.93% to 1.42% with the average value calculated by using the optimized coil structure. Plasma simulation and experiments confirm the source of etching non-uniformity and the knowledge is important to the fabrication of GaN-based and other devices, especially large-scale industrial production requiring low cost and 450 mm wafer capability." @default.
- W3046597459 created "2020-08-07" @default.
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- W3046597459 date "2020-10-01" @default.
- W3046597459 modified "2023-09-29" @default.
- W3046597459 title "Improvement of GaN plasma etching uniformity by optimizing the coil electrode with plasma simulation and experimental validation" @default.
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- W3046597459 doi "https://doi.org/10.1016/j.surfcoat.2020.126252" @default.
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