公开(公告)号：US06544824B1

公开(公告)日：2003-04-08

申请号：US10038390

申请日：2002-01-03

申请人： Yelehanka Pradeep ,  Jia Zhen Zheng ,  Lap Chan ,  Elgin Quek ,  Ravi Sundaresan ,  Yang Pan ,  James Lee Yong Meng ,  Ying Keung

发明人： Yelehanka Pradeep ,  Jia Zhen Zheng ,  Lap Chan ,  Elgin Quek ,  Ravi Sundaresan ,  Yang Pan ,  James Lee Yong Meng ,  Ying Keung

IPC分类号： H01L2100

CPC分类号： H01L29/66666

摘要： A method of manufacturing a vertical transistor. A doped region is formed in a substrate. We form sequentially on the substrate: a first spacer dielectric layer, a first gate electrode, a second spacer dielectric layer, a second gate electrode and a third spacer dielectric layer. A trench is formed through the first spacer dielectric layer, the first gate electrode, the second spacer dielectric layer, the second gate electrode and the third spacer dielectric layer. The trench has sidewalls. A gate dielectric layer is formed over the sidewalls of the trench. We form sequentially, in the trench: a first doped layer, a first channel layer, a second doped layer, a third doped layer, a second channel layer, and a fourth doped layer. A cap layer is formed over the structure. Contacts are preferably formed to the doped region, doped layers and gate electrodes.

摘要翻译： 一种垂直晶体管的制造方法。 在衬底中形成掺杂区域。 我们在衬底上依次形成：第一间隔电介质层，第一栅电极，第二间隔电介质层，第二栅电极和第三间隔电介质层。 通过第一间隔电介质层，第一栅电极，第二间隔电介质层，第二栅电极和第三间隔电介质层形成沟槽。 沟槽有侧壁。 栅极电介质层形成在沟槽的侧壁上。 我们在沟槽中依次形成：第一掺杂层，第一沟道层，第二掺杂层，第三掺杂层，第二沟道层和第四掺杂层。 在该结构上形成盖层。 触点优选地形成于掺杂区域，掺杂层和栅电极。

公开(公告)号：US06861317B1

公开(公告)日：2005-03-01

申请号：US10664211

申请日：2003-09-17

申请人： Purakh Raj Verma ,  Sanford Chu ,  Lap Chan ,  Yelehanka Pradeep ,  Kai Shao ,  Jia Zhen Zheng

发明人： Purakh Raj Verma ,  Sanford Chu ,  Lap Chan ,  Yelehanka Pradeep ,  Kai Shao ,  Jia Zhen Zheng

IPC分类号： H01L21/00 ,  H01L21/3205 ,  H01L21/336 ,  H01L21/4763 ,  H01L21/768 ,  H01L21/84 ,  H01L29/76 ,  H01L29/94 ,  H01L31/062 ,  H01L31/113 ,  H01L31/119

CPC分类号： H01L21/76802 ,  H01L21/76829

摘要： A CMOS RF device and a method to fabricate said device with low gate contact resistance are described. Conventional MOS transistor is first formed with isolation regions, poly-silicon gate structure, sidewall spacers around poly gate, and implanted source/drain with lightly and heavily doped regions. A silicon dioxide layer such as TEOS is deposited, planarized with chemical mechanical polishing (CMP) to expose the gate and treated with dilute HF etchant to recess the silicon dioxide layer below the surface of the gate. Silicon nitride is then deposited and planarized with CMP and then etched except around the gates, using a oversize poly-silicon gate mask. Inter-level dielectric mask is then deposited, contact holes etched, and contact metal is deposited to form the transistor. During contact hole etch over poly-silicon gate, silicon nitride around the poly gate acts as an etch stop. Resulting structure with direct gate contact achieves significantly reduced gate resistance and thereby improved noise performance at high frequency operation, increased unit power gain frequency (fmax), and reduced gate delay.

摘要翻译： 描述CMOS RF器件和制造具有低栅极接触电阻的所述器件的方法。 传统的MOS晶体管首先形成有隔离区域，多晶硅栅极结构，围绕多晶硅栅极的侧壁隔离物以及具有轻掺杂和重掺杂区域的注入源极/漏极。 沉积诸如TEOS的二氧化硅层，通过化学机械抛光（CMP）平坦化以暴露栅极，并用稀的HF蚀刻剂处理以使位于栅极表面下方的二氧化硅层凹陷。 然后将氮化硅沉积并用CMP平坦化，然后使用超大型多晶硅栅极掩模在栅极周围进行蚀刻。 然后沉积层间电介质掩模，蚀刻接触孔，并沉积接触金属以形成晶体管。 在多晶硅栅极的接触孔蚀刻期间，多晶硅周围的氮化硅作为蚀刻停止。 具有直接栅极接触的所得结构实现了显着降低的栅极电阻，从而改善了高频操作时的噪声性能，增加的单位功率增益频率（fmax）和减小的栅极延迟。

公开(公告)号：US07382027B2

公开(公告)日：2008-06-03

申请号：US11045958

申请日：2005-01-28

申请人： Purakh Raj Verma ,  Sanford Chu ,  Lap Chan ,  Yelehanka Pradeep ,  Kai Shao ,  Jia Zhen Zheng

发明人： Purakh Raj Verma ,  Sanford Chu ,  Lap Chan ,  Yelehanka Pradeep ,  Kai Shao ,  Jia Zhen Zheng

IPC分类号： H01L29/76 ,  H01L29/94 ,  H01L31/062 ,  H01L31/113 ,  H01L31/119

CPC分类号： H01L21/76802 ,  H01L21/76829

摘要： A CMOS RF device and a method to fabricate said device with low gate contact resistance are described. Conventional MOS transistor is first formed with isolation regions, poly-silicon gate structure, sidewall spacers around poly gate, and implanted source/drain with lightly and heavily doped regions. A silicon dioxide layer such as TEOS is deposited, planarized with chemical mechanical polishing (CMP) to expose the gate and treated with dilute HF etchant to recess the silicon dioxide layer below the surface of the gate. Silicon nitride is then deposited and planarized with CMP and then etched except around the gates, using a oversize poly-silicon gate mask. Inter-level dielectric mask is then deposited, contact holes etched, and contact metal is deposited to form the transistor. During contact hole etch over poly-silicon gate, silicon nitride around the poly gate acts as an etch stop. Resulting structure with direct gate contact achieves significantly reduced gate resistance and thereby improved noise performance at high frequency operation, increased unit power gain frequency (fmax), and reduced gate delay.

摘要翻译： 描述CMOS RF器件和制造具有低栅极接触电阻的所述器件的方法。 传统的MOS晶体管首先形成有隔离区域，多晶硅栅极结构，围绕多晶硅栅极的侧壁隔离物以及具有轻掺杂和重掺杂区域的注入源极/漏极。 沉积诸如TEOS的二氧化硅层，通过化学机械抛光（CMP）平坦化以暴露栅极，并用稀的HF蚀刻剂处理以使位于栅极表面下方的二氧化硅层凹陷。 然后将氮化硅沉积并用CMP平坦化，然后使用超大型多晶硅栅极掩模在栅极周围进行蚀刻。 然后沉积层间电介质掩模，蚀刻接触孔，并沉积接触金属以形成晶体管。 在多晶硅栅极的接触孔蚀刻期间，多晶硅周围的氮化硅作为蚀刻停止。 具有直接栅极接触的所得结构实现了显着降低的栅极电阻，从而改善了高频操作下的噪声性能，增加的单位功率增益频率（f max）和减小的栅极延迟。

公开(公告)号：US06632745B1

公开(公告)日：2003-10-14

申请号：US10222387

申请日：2002-08-16

申请人： Chiew Wah Yap ,  Zheng Zou ,  Eng Hua Lim ,  Nguyen Lac ,  Yelehanka Pradeep ,  Manni Lal

发明人： Chiew Wah Yap ,  Zheng Zou ,  Eng Hua Lim ,  Nguyen Lac ,  Yelehanka Pradeep ,  Manni Lal

IPC分类号： H01L21311

CPC分类号： H01L29/6653 ,  H01L29/665

摘要： A patterned and etched layer of gate electrode material is formed over the active surface of a substrate, a layer of liner oxide is created, gate spacers are created. Under the first embodiment of the invention, a layer of TEOS is deposited over the created structure over which a layer of nitride is deposited, The layer of nitride is etched, this etch is extended into an overetch creating openings through the layer of TEOS where this layer overlies the gate spacers. The gate spacers are then further etched. Under the second embodiment of the invention, a layer of TEOS is deposited over the created structure. The layer of TEOS is etched, stopping on the silicon nitride of the gate spacers. The gate spacers are then further etched.

摘要翻译： 在衬底的有源表面上形成图案化和蚀刻的栅极材料层，形成衬垫氧化物层，形成栅极间隔物。在本发明的第一个实施方案中，存在一层TEOS 在其上沉积氮化物层的所产生的结构上。蚀刻氮化物层，该蚀刻扩展到通过TEOS层产生开口的过蚀刻，其中该层覆盖在栅极间隔物上。 然后进一步蚀刻栅极间隔物。在本发明的第二实施例中，在所创建的结构上沉积TEOS层。 蚀刻TEOS层，停留在栅极间隔物的氮化硅上。 然后进一步蚀刻栅极间隔物