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    • 2. 发明专利
    • Field effect transistor
    • 场效应晶体管
    • JP2012074722A
    • 2012-04-12
    • JP2011259277
    • 2011-11-28
    • Raytheon Coレイセオン カンパニー
    • HWANG KIUCHUL
    • H01L27/095H01L21/338H01L21/8252H01L29/778H01L29/812H01L31/0328
    • H01L21/8252H01L27/095
    • PROBLEM TO BE SOLVED: To increase the yield by improving the selective etching property of an etching stopper layer in an enhancement mode transistor device and a depression mode transistor device.SOLUTION: An InGaP etching stop/Schottky contact layer of an enhancement mode transistor device is disposed on a channel layer 20. A first layer 26 different from InGaP is disposed thereon. A depression mode transistor device etching stop layer 28 is disposed on the first layer. A second layer 30 is disposed on the etching stop layer. The depression mode transistor device has a gate recess that penetrates through the second layer and the etching stop layer and that ends at the first layer. The enhancement mode transistor device has a gate recess that penetrates through the second layer, the depression mode transistor device etching stop layer, and the first layer and that ends at the InGaP layer.
    • 要解决的问题:通过提高增强型晶体管器件和抑制模式晶体管器件中的蚀刻停止层的选择性蚀刻性能来提高产率。 解决方案:增强型晶体管器件的InGaP蚀刻停止/肖特基接触层设置在沟道层20上。与InGaP不同的第一层26设置在其上。 凹陷模式晶体管器件蚀刻停止层28设置在第一层上。 第二层30设置在蚀刻停止层上。 凹陷模式晶体管器件具有穿过第二层和蚀刻停止层并且在第一层结束的栅极凹槽。 增强型晶体管器件具有穿过第二层,凹陷模式晶体管器件蚀刻停止层和第一层并且终止于InGaP层的栅极凹槽。 版权所有(C)2012,JPO&INPIT