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Growth of Ga- and N- polar gallium nitride layers by metalorganic vapor phase epitaxy on sapphire wafers

机译:通过金属有机气相外延在蓝宝石晶片上生长Ga和N极性氮化镓层

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摘要

Following an already established polarity control scheme for GaN thin films, we developed a process to simultaneously grow Ga- and N-polarity layers side by side on c-plane sapphire. The simultaneous growth is achieved by properly treating the A1N nucleation/buffer layer and subsequent substrate annealing. During this process, the growth is mass-transfer-limited, permitting the same growth rate for both types of polarity domains. Smooth domains of both polarity types (RMS roughness ~1-2nm) were obtained.
机译:根据已经建立的用于GaN薄膜的极性控制方案,我们开发了一种在c面蓝宝石上并排生长Ga和N极性层的工艺。通过适当地处理AlN成核/缓冲层和随后的基板退火,可以实现同时生长。在此过程中,生长受到传质限制,两种极性域的生长速率相同。获得了两种极性类型(RMS粗糙度〜1-2nm)的光滑区域。

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