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1.发明申请Extendible process for improved top oxide layer for DRAM array and the gate interconnects while providing self-aligned gate contacts 审中-公开用于DRAM阵列和栅极互连的改进的顶部氧化物层，同时提供自对准栅极触点的可扩展工艺公开(公告)号：US20040256651A1
公开(公告)日：2004-12-23
申请号：US10896547
申请日：2004-07-22
发明人： Thomas W. Dyer , Andreas Knorr , Laertis Economikos , Scott Halle , Rajeev Malik , Norbert Arnold
IPC分类号： H01L029/76 , H01L021/8242 , H01L031/119 , H01L029/94 , H01L021/336
CPC分类号： H01L27/10864 , H01L27/10891
摘要： A Top Oxide Method is used to form an oxide layer over an array of vertical transistors as in a trench dynamic random access memory (DRAM) array with vertically stacked access metal oxide semiconductor field effect transistors (MOSFETs). The Top Oxide is formed by first forming the vertical devices with the pad nitride remaining in place. Once the devices have been formed and the gate polysilicon has been planarized down to the surface of the pad nitride, the pad nitride is stripped away leaving the tops of the gate polysilicon plugs extending above the active silicon surface. This pattern of polysilicon plugs defines the pattern over which the Top Oxide is deposited. The deposited Top Oxide fills the regions between and on top of the polysilicon plugs. The Top Oxide is then planarized back to the tops of the polysilicon plugs so contacts can be made between the passing interconnects and the gates of the vertical devices. The Top Oxide layer serves to separate the passing interconnects from the active silicon thereby reducing capacitive coupling between the two levels and providing a robust etch-stop layer for the reactive ion etch (RIE) patterning of the subsequent interconnect level.
摘要翻译： 如在具有垂直堆叠的存取金属氧化物半导体场效应晶体管（MOSFET）的沟槽动态随机存取存储器（DRAM）阵列中，顶部氧化物方法用于在垂直晶体管阵列上形成氧化物层。 顶部氧化物通过首先形成垂直装置而形成，其中衬垫氮化物保持就位。 一旦器件已经形成并且栅极多晶硅已经被平坦化到衬底氮化物的表面之下，衬垫氮化物被剥离掉，留下栅极多晶硅插塞的顶部延伸到活性硅表面之上。 这种多晶硅插塞的图形定义了顶部氧化物沉积的图案。 沉积的顶部氧化物填充多晶硅插塞之间和之上的区域。 然后将顶部氧化物平面化回多晶硅插塞的顶部，因此可以在通过的互连件和垂直装置的栅极之间形成接触。 顶部氧化物层用于将通过的互连与有源硅分离，从而减少两个电平之间的电容耦合，并提供用于后续互连电平的反应离子蚀刻（RIE）图案化的鲁棒蚀刻停止层。
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2.发明申请STRUCTURE AND METHODS FOR PROCESS INTEGRATION IN VERTICAL DRAM CELL FABRICATION 有权用于垂直DRAM单元制造过程集成的结构和方法公开(公告)号：US20030186502A1
公开(公告)日：2003-10-02
申请号：US10249997
申请日：2003-05-27
发明人： Rajeev Malik , Larry Nesbit , Jochen Beintner , Rama Divakaruni
IPC分类号： H01L021/8242 , H01L021/76
CPC分类号： H01L27/10894 , H01L21/76224 , H01L27/10861
摘要： A method for processing a semiconductor memory device is disclosed, the memory device including an array area and a support area thereon. In an exemplary embodiment of the invention, the method includes removing, from the array area, an initial pad nitride material formed on the device. The initial pad nitride material in the support area, however, is still maintained. Active device areas are then formed within the array area, wherein the initial pad nitride maintained in the support area helps to protect the support area from wet etch processes implemented during the formation of active device areas within the array area.
摘要翻译： 公开了一种用于处理半导体存储器件的方法，所述存储器件包括阵列区域和其上的支撑区域。 在本发明的示例性实施例中，该方法包括从阵列区域去除在器件上形成的初始衬垫氮化物材料。 然而，支撑区域中的初始衬垫氮化物材料仍然保持。 然后在阵列区域内形成有源器件区域，其中保持在支撑区域中的初始衬垫氮化物有助于保护支撑区域免受在阵列区域内形成有源器件区域期间实现的湿蚀刻工艺。
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公开(公告)号：US20030003653A1
公开(公告)日：2003-01-02
申请号：US09895672
申请日：2001-06-29
发明人： Rajeev Malik , Larry Nesbit , Jochen Beintner , Rama Divakaruni
IPC分类号： H01L021/8234 , H01L021/8244 , H01L021/8242 , H01L021/20
CPC分类号： H01L27/10894 , H01L21/76224 , H01L27/10861
摘要： A method for processing a semiconductor memory device is disclosed, the memory device including an array area and a support area thereon. In an exemplary embodiment of the invention, the method includes removing, from the array area, an initial pad nitride material formed on the device. The initial pad nitride material in the support area, however, is still maintained. Active device areas are then formed within the array area, wherein the initial pad nitride maintained in the support area helps to protect the support area from wet etch processes implemented during the formation of active device areas within the array area.
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4.发明申请Apparatus and method to improve resist line roughness in semiconductor wafer processing 失效改善半导体晶片处理中抗蚀剂线粗糙度的装置和方法公开(公告)号：US20040131979A1
公开(公告)日：2004-07-08
申请号：US10338273
申请日：2003-01-07
发明人： Wai-kin Li , Rajeev Malik , Joseph J. Mezzapelle
IPC分类号： G03C005/00
CPC分类号： G03F7/091 , G03F7/11 , Y10S430/151
摘要： A process for prohibiting amino group transport from the top surface of a layered semiconductor wafer to a photoresist layer introduces a thin film oxynitride over the silicon nitride layer using a high temperature step of nitrous oxide (N2O) plus oxygen (O2) at approximately 300null C. for about 50 to 120 seconds. By oxidizing the silicon nitride layer, the roughness resulting from the adverse affects of amino group transport eliminated. Moreover, this high temperature step, non-plasma process can be used with the more advanced 193 nanometer technology, and is not limited to the 248 nanometer technology. A second method for exposing the silicon nitride layer to an oxidizing ambient, prior to the application of antireflective coating, introduces a mixture of N2H2 and oxygen (O2) ash at a temperature greater than or equal to 250null C. for approximately six minutes. This is followed by an O2 plasma clean and/or an Ozone clean, and then the subsequent layering of the ARC and photoresist.
摘要翻译： 用于禁止从层状半导体晶片的顶表面到光致抗蚀剂层的氨基转移的方法使用氧化亚氮（N 2 O）和氧（O 2）在约300°的高温步骤在氮化硅层上引入薄膜氧氮化物 C.约50至120秒。 通过氧化氮化硅层，消除了由氨基转移的不利影响产生的粗糙度。 此外，这种高温步骤，非等离子体工艺可以采用更先进的193纳米技术，并不限于248纳米技术。 在施加抗反射涂层之前将氮化硅层暴露于氧化环境的第二种方法是在大于或等于250℃的温度下引入N 2 H 2和氧（O 2）灰分的混合物约6分钟。 之后是O2等离子体清洁和/或臭氧清洁，然后再分层ARC和光刻胶。
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公开(公告)号：US20030001200A1
公开(公告)日：2003-01-02
申请号：US09896741
申请日：2001-06-29
IPC分类号： H01L021/336 , H01L029/76 , H01L029/94
CPC分类号： H01L27/10876 , H01L27/10864 , H01L27/10891
摘要： The vertical MOSFET structure used in forming dynamic random access memory comprises a gate stack structure comprising one or more silicon nitride spacers; a vertical gate polysilicon region disposed in an array trench, wherein the vertical gate polysilicon region comprises one or more silicon nitride spacers; a bitline diffusion region; a shallow trench isolation region bordering the array trench; and wherein the gate stack structure is disposed on the vertical gate polysilicon region such that the silicon nitride spacers of the gate stack structure and vertical gate polysilicon region form a borderless contact with both the bitline diffusion region and shallow trench isolation region. The vertical gate polysilicon is isolated from both the bitline diffusion and shallow trench isolation region by the nitride spacer, which provides reduced bitline capacitance and reduced incidence of bitline diffusion to vertical gate shorts.
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6.发明申请Gate metal recess for oxidation protection and parasitic capacitance reduction 失效栅极金属凹槽用于氧化保护和寄生电容降低公开(公告)号：US20040150056A1
公开(公告)日：2004-08-05
申请号：US10355726
申请日：2003-01-31
发明人： Haining Yang , Ramachandra Divakaruni , Oleg Gluschenkov , Rajeev Malik , Hongwen Yan , Ravikumar Ramachandran
IPC分类号： H01L029/76 , H01L029/94
CPC分类号： H01L21/28247 , H01L21/28061 , H01L21/76838
摘要： A method of fabricating a semiconductor device having a dielectric structure on which a gate stack having a gate stack surface is formed, the gate stack having one or more gate metal layers comprising a gate metal, wherein the gate metal is recessed from the gate stack surface by a chemical etch, is provided. The method includes oxidizing the gate metal of the gate stack selectively to form a smooth side wall on the gate stack, and depositing a gate spacer to the gate stack.
摘要翻译： 一种制造具有电介质结构的半导体器件的方法，其上形成具有栅叠层表面的栅极叠层，所述栅叠层具有一个或多个包含栅极金属的栅极金属层，其中栅极金属从栅叠层表面凹陷 通过化学蚀刻。 所述方法包括选择性地氧化栅极堆叠的栅极金属，以在栅极堆叠上形成平滑的侧壁，以及将栅极间隔物沉积到栅极叠层。
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公开(公告)号：US20040155275A1
公开(公告)日：2004-08-12
申请号：US10775441
申请日：2004-02-10
IPC分类号： H01L027/108
CPC分类号： H01L27/10864 , H01L21/31612 , H01L21/3185 , H01L27/10867
摘要： A structure and method which enables the deposit of a thin nitride liner just before Trench Top Oxide TTO (High Density Plasma) HDP deposition during the formation of a vertical MOSFET DRAM cell device. This liner is subsequently removed after TTO sidewall etch. One function of this liner is to protect the collar oxide from being etched during the TTO oxide sidewall etch and generally provides lateral etch protection which is not realized in the current processing scheme. The process sequence does not rely on previously deposited films for collar protection, and decouples TTO sidewall etch protection from previous processing steps to provide additional process flexibility, such as allowing a thinner strap Cut Mask nitride and greater nitride etching during node nitride removal and buried strap nitrided interface removal. Advantageously, the presence of the nitride liner beneath the TTO reduces possibility of TTO dielectric breakdown between the gate and capacitor node electrode of the vertical MOSFET DRAM cell, while assuring strap diffusion to gate conductor overlap.
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8.发明申请公开(公告)号：US20040106258A1
公开(公告)日：2004-06-03
申请号：US10720490
申请日：2003-11-24
IPC分类号： H01L021/8242 , H01L021/336
CPC分类号： H01L27/10864 , H01L21/31612 , H01L21/3185 , H01L27/10867
摘要： A structure and method which enables the deposit of a thin nitride liner just before Trench Top Oxide TTO (High Density Plasma) HDP deposition during the formation of a vertical MOSFET DRAM cell device. This liner is subsequently removed after TTO sidewall etch. One function of this liner is to protect the collar oxide from being etched during the TTO oxide sidewall etch and generally provides lateral etch protection which is not realized in the current processing scheme. The process sequence does not rely on previously deposited films for collar protection, and decouples TTO sidewall etch protection from previous processing steps to provide additional process flexibility, such as allowing a thinner strap Cut Mask nitride and greater nitride etching during node nitride removal and buried strap nitrided interface removal. Advantageously, the presence of the nitride liner beneath the TTO reduces possibility of TTO dielectric breakdown between the gate and capacitor node electrode of the vertical MOSFET DRAM cell, while assuring strap diffusion to gate conductor overlap.
摘要翻译： 在垂直MOSFET DRAM单元器件形成期间，能够在沟槽顶氧化物TTO（高密度等离子体）HDP沉积之前沉积薄氮化物衬垫的结构和方法。 随后在TTO侧壁蚀刻之后移除该衬垫。 该衬垫的一个功能是在TTO氧化物侧壁蚀刻期间保护套环氧化物不被蚀刻，并且通常提供在当前处理方案中未实现的横向蚀刻保护。 工艺顺序不依赖于先前沉积的膜用于套环保护，并且将TTO侧壁蚀刻保护与先前的处理步骤分离，以提供附加的工艺灵活性，例如在节点氮化物去除期间允许更薄的带切割掩模氮化物和更大的氮化物蚀刻和掩埋带 氮化界面去除。 有利地，在TTO之下的氮化物衬垫的存在降低了垂直MOSFET DRAM单元的栅极和电容器节点电极之间的TTO介质击穿的可能性，同时确保带扩散到栅极导体重叠。
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