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Drug Absorption: Factors Affecting GI Absorption01:19

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The process of oral drug absorption can be influenced by several factors. Weakly acidic drugs tend to be absorbed more readily from the stomach due to their nonionized state. However, absorption may be less efficient in the upper intestine, where drugs are often ionized. Interestingly, despite the stomach's apparent advantage for drug absorption, its mucous layer can hinder diffusion. Its surface area is also smaller than the intestine's, which can further slow down the absorption rate.
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兼容CMOS的微型光伏发电机与后处理增强光学吸收.

Hung-Wei Chen1, Chi-Yuan Lee2, Ching-Liang Dai3

  • 1Powerchip Semiconductor Manufacturing Corporation, Miaoli 366, Taiwan.

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概括
此摘要是机器生成的。

研究人员使用CMOS技术开发了一台微光伏发电机 (MPG). 这种电网结构的设备显著提高了潜在的电力应用的光能转换效率.

关键词:
这是一个CMOS系统.在MEMS MEMS中使用.转换效率的转换效率是什么微光伏发电机微光伏发电机输出功率 输出功率 输出功率

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电气工程 电气工程
  • 半导体物理 半导体物理

背景情况:

  • 微型光伏发电机 (MPG) 对于收集光能至关重要.
  • 标准的CMOS技术为制造这些设备提供了一个可扩展的平台.
  • 优化接口设计和光学合是提高MPG性能的关键.

研究的目的:

  • 使用标准的0.18微米CMOS技术设计和制造基于的MPG.
  • 通过网格结构的架构来增强光电流的产生.
  • 通过CMOS后处理来改善光学合并减少反射损失.

主要方法:

  • 使用0.18微米CMOS工艺制造MPG.
  • 在n-well中实现一个带有图案的p型区域的网格结构架构.
  • 应用CMOS后的湿蚀刻工艺来去除二氧化层.

主要成果:

  • MPG具有类似网格的p-n连接网络,扩大了连接区域并增强了载体收集.
  • 后CMOS处理有效地去除了介电层,使光子能够直接透并最大限度地减少反射.
  • 在1000W/m2的照明下,该设备实现了0.49V的开通电压,239μA的短路电流,90μW的最大功率.
  • 记录了12.9%的整体能量转换效率.

结论:

  • 网格结构的连接设计有效地提高了光电流的产生.
  • 处理后去除介电层可以显著提高光学合和设备性能.
  • 制造的MPG表现出高效率,验证了综合设计和制造方法.