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    • 4. 发明授权
    • Fast MOSFET with low-doped source/drain
    • 具有低掺杂源极/漏极的快速MOSFET
    • US06238960B1
    • 2001-05-29
    • US09483400
    • 2000-01-14
    • Witold P. MaszaraSrinath KrishnanMing-Ren Lin
    • Witold P. MaszaraSrinath KrishnanMing-Ren Lin
    • H01L21336
    • H01L29/66772H01L29/6659H01L29/7833H01L29/78612H01L29/78621H01L29/78654
    • A method (100) of forming a transistor (50, 80) includes forming a gate oxide (120) over a portion of a semiconductor material (56, 122) and forming a doped polysilicon film (124) having a dopant concentration over the gate oxide (122). Subsequently, the doped polysilicon film (124) is etched to form a gate electrode (52) overlying a channel region (58) in the semiconductor material (56, 122), wherein the gate electrode (52) separates the semiconductor material into a first region (60) and a second region (68) having the channel region (58) therebetween. The method (100) further includes forming a drain extension region (64) in the first region (60) and a source extension region (72) in the second region (68), and forming a drain region (62) in the first region (60) and a source region (70) in the second region (68). The source/drain formation is such that the drain and source regions (62, 70) have a dopant concentration which is less than the polysilicon film (124) doping concentration. The lower doping concentration in the source/drain regions (62, 70) lowers the junction capacitance and provides improved control of floating body effects when employed in SOI type processes.
    • 形成晶体管(50,80)的方法(100)包括在半导体材料(56,122)的一部分上形成栅极氧化物(120),并形成掺杂浓度超过栅极的掺杂多晶硅膜(124) 氧化物(122)。 随后,蚀刻掺杂多晶硅膜(124)以形成覆盖半导体材料(56,122)中的沟道区域(58)的栅电极(52),其中栅电极(52)将半导体材料分离成第一 区域(60)和在其间具有沟道区(58)的第二区域(68)。 方法(100)还包括在第一区域(60)中形成漏极延伸区域(64)和在第二区域(68)中形成源极延伸区域(72),并且在第一区域 (60)和第二区域(68)中的源极区域(70)。 源极/漏极形成使得漏极和源极区域(62,70)具有小于多晶硅膜(124)掺杂浓度的掺杂剂浓度。 源极/漏极区域(62,70)中的较低掺杂浓度降低了结电容,并且当用于SOI类型工艺时,提供对浮体效应的改进的控制。
    • 5. 发明授权
    • Fast Mosfet with low-doped source/drain
    • 具有低掺杂源/漏极的快速Mosfet
    • US06060364A
    • 2000-05-09
    • US260880
    • 1999-03-02
    • Witold P. MaszaraSrinath KrishnanMing-Ren Lin
    • Witold P. MaszaraSrinath KrishnanMing-Ren Lin
    • H01L21/336H01L29/78H01L29/786
    • H01L29/66772H01L29/6659H01L29/7833H01L29/78612H01L29/78621H01L29/78654
    • A method (100) of forming a transistor (50, 80) includes forming a gate oxide (120) over a portion of a semiconductor material (56, 122) and forming a doped polysilicon film (124) having a dopant concentration over the gate oxide (122). Subsequently, the doped polysilicon film (124) is etched to form a gate electrode (52) overlying a channel region (58) in the semiconductor material (56, 122), wherein the gate electrode (52) separates the semiconductor material into a first region (60) and a second region (68) having the channel region (58) therebetween. The method (100) further includes forming a drain extension region (64) in the first region (60) and a source extension region (72) in the second region (68), and forming a drain region (62) in the first region (60) and a source region (70) in the second region (68). The source/drain formation is such that the drain and source regions (62, 70) have a dopant concentration which is less than the polysilicon film (124) doping concentration. The lower doping concentration in the source/drain regions (62, 70) lowers the junction capacitance and provides improved control of floating body effects when employed in SOI type processes.
    • 形成晶体管(50,80)的方法(100)包括在半导体材料(56,122)的一部分上形成栅极氧化物(120),并形成掺杂浓度超过栅极的掺杂多晶硅膜(124) 氧化物(122)。 随后,蚀刻掺杂多晶硅膜(124)以形成覆盖半导体材料(56,122)中的沟道区域(58)的栅电极(52),其中栅电极(52)将半导体材料分离成第一 区域(60)和在其间具有沟道区(58)的第二区域(68)。 方法(100)还包括在第一区域(60)中形成漏极延伸区域(64)和在第二区域(68)中形成源极延伸区域(72),并且在第一区域 (60)和第二区域(68)中的源极区域(70)。 源极/漏极形成使得漏极和源极区域(62,70)具有小于多晶硅膜(124)掺杂浓度的掺杂剂浓度。 源极/漏极区域(62,70)中的较低掺杂浓度降低了结电容,并且当用于SOI类型工艺时,提供对浮体效应的改进的控制。
    • 6. 发明授权
    • Method for and device having STI using partial etch trench bottom liner
    • 使用局部蚀刻槽底衬的STI和器件的方法
    • US06486038B1
    • 2002-11-26
    • US09804360
    • 2001-03-12
    • Witold P. MaszaraMing-Ren LinQi Xiang
    • Witold P. MaszaraMing-Ren LinQi Xiang
    • H01L2176
    • H01L21/76264H01L21/76283
    • A method of isolation of active islands on a silicon-on-insulator semiconductor device, comprising the steps of (a) providing a silicon-on-insulator semiconductor wafer having a silicon active layer, a dielectric isolation layer and a silicon substrate, in which the silicon active layer is formed on the dielectric isolation layer and the dielectric isolation layer is formed on the silicon substrate; (b) etching the silicon active layer to form an isolation trench wherein an unetched silicon layer at bottom of the isolation trench remains; (c) oxidizing the layer of silicon at the bottom of the isolation trench to a degree sufficient to oxidize through the layer of silicon at the bottom to the dielectric isolation layer; and (d) filling the isolation trench with a trench isolation material to form a shallow trench isolation structure.
    • 一种隔离绝缘体上半导体器件上的有源岛的方法,包括以下步骤:(a)提供具有硅有源层,介电隔离层和硅衬底的绝缘体上硅半导体晶片,其中 在介电隔离层上形成硅有源层,并在硅衬底上形成电介质隔离层; (b)蚀刻硅有源层以形成隔离沟槽,其中保留隔离沟槽底部的未蚀刻硅层; (c)将隔离沟槽的底部的硅层氧化至足以通过底部的硅层氧化成电介质隔离层的程度; 和(d)用沟槽隔离材料填充隔离沟槽以形成浅沟槽隔离结构。