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    • 3. 发明专利
    • Semiconductor device and method of manufacturing the same
    • 半导体器件及其制造方法
    • JP2014053615A
    • 2014-03-20
    • JP2013184773
    • 2013-09-06
    • Samsung Electronics Co Ltd三星電子株式会社Samsung Electronics Co.,Ltd.
    • KIM SUNGGILHOE SONG-HWEKIM JUNG-HWANKIM HONGSUKYON GUK-HYONCHOI JAEHO
    • H01L21/336H01L21/8247H01L27/105H01L27/115H01L29/788H01L29/792H01L45/00H01L49/00
    • H01L29/788H01L21/764H01L27/11521H01L27/11556H01L27/11568H01L27/11582H01L29/42332H01L29/4234H01L29/66825H01L29/66833
    • PROBLEM TO BE SOLVED: To provide a semiconductor device having air gaps, and a method of manufacturing the same.SOLUTION: A semiconductor device according to the present invention includes: a semiconductor substrate having trenches defining active regions; a gate electrode passing over the active regions; a charge storage pattern between the gate electrode and the active regions; a porous insulating film extending above the trenches between the gate electrode and the charge storage pattern; and air gaps formed between the porous insulating film and bottom surfaces of the trenches. A method of manufacturing the semiconductor device according to the present invention includes the steps of: forming the trenches that define the plurality number of active regions in the semiconductor substrate; forming a sacrificial film in the trenches; forming the porous insulating film that extends on a top surface of the sacrificial film above the plurality number of active regions and has a plurality number of air holes; removing the sacrificial film through the air holes of the porous insulating film and forming the air gaps that are defined by the porous insulating film in the trenches under the porous insulating film; and forming the gate electrode above the porous insulating film.
    • 要解决的问题:提供一种具有气隙的半导体器件及其制造方法。本发明的半导体器件包括:具有限定有源区的沟槽的半导体衬底; 栅电极穿过有源区; 栅电极和有源区之间的电荷存储图案; 在栅电极和电荷存储图案之间的沟槽上方延伸的多孔绝缘膜; 以及在多孔绝缘膜和沟槽的底表面之间形成的气隙。 根据本发明的制造半导体器件的方法包括以下步骤:在半导体衬底中形成限定多个有源区的沟槽; 在沟槽中形成牺牲膜; 形成在多个活性区域上方的牺牲膜的上表面上延伸的多孔绝缘膜,并且具有多个气孔; 通过多孔绝缘膜的空气孔去除牺牲膜,并在多孔绝缘膜下方的沟槽中形成由多孔绝缘膜限定的气隙; 以及在多孔绝缘膜上形成栅电极。