公开(公告)号：US07435659B2

公开(公告)日：2008-10-14

申请号：US11068117

申请日：2005-02-28

申请人： Binghua Hu ,  Sameer P. Pendharkar ,  Bill A. Wofford ,  Joseph M. Ramirez

发明人： Binghua Hu ,  Sameer P. Pendharkar ,  Bill A. Wofford ,  Joseph M. Ramirez

IPC分类号： H01L21/76

CPC分类号： H01L23/544 ,  G03F9/7076 ,  G03F9/708 ,  G03F9/7084 ,  H01L21/2652 ,  H01L21/823493 ,  H01L21/8249 ,  H01L2223/54453 ,  H01L2924/0002 ,  H01L2924/00

摘要： The present invention provides a method for manufacturing a semiconductor device having an alignment feature. The method for manufacturing the semiconductor device, among other steps, may include implanting an n-type dopant into a substrate thereby forming an implanted region and an unimplanted region in the substrate. The method may further include oxidizing the substrate using a wet oxidation process, the wet oxidation process and n-type dopant causing a ratio of oxidation of the implanted region to the unimplanted region to be 2:1 or greater, and then removing the oxidized portions of the substrate thereby leaving an alignment feature proximate the implanted region.

摘要翻译： 本发明提供一种具有对准特征的半导体器件的制造方法。 除了其他步骤之外，制造半导体器件的方法可以包括将n型掺杂剂注入衬底中，从而在衬底中形成注入区域和未被注入的区域。 该方法可以进一步包括使用湿式氧化法，湿法氧化法和n型掺杂剂使得注入区域与未被注入的区域的氧化比例为2:1或更大，然后除去氧化部分 从而在植入区域附近留下对准特征。

公开(公告)号：US20080246117A1

公开(公告)日：2008-10-09

申请号：US11696829

申请日：2007-04-05

申请人： Sameer Pendharkar ,  Binghua Hu ,  Xinfen Celia Chen

发明人： Sameer Pendharkar ,  Binghua Hu ,  Xinfen Celia Chen

IPC分类号： H01L21/4763 ,  H01L21/04 ,  H01L29/72

CPC分类号： H01L29/7322 ,  H01L23/544 ,  H01L29/41708 ,  H01L29/66272 ,  H01L2924/0002 ,  H01L2924/00

摘要： A method for manufacturing a semiconductor device that comprises implanting a first dopant type in a well region of a substrate to form implanted sub-regions that are separated by non-implanted areas of the well region. The method also comprises forming an oxide layer over the well region, such that an oxide-converted first thickness of the implanted sub-regions is greater than an oxide-converted second thickness of the non-implanted areas. The method further comprises removing the oxide layer to form a topography feature on the well region. The topography feature comprises a surface pattern of higher and lower portions. The higher portions correspond to locations of the non-implanted areas and the lower portions correspond to the implanted sub-regions.

摘要翻译： 一种用于制造半导体器件的方法，包括在衬底的阱区中注入第一掺杂剂类型以形成由所述阱区的非植入区域分离的注入的子区。 该方法还包括在阱区上形成氧化物层，使得注入的子区域的氧化物转化的第一厚度大于非植入区域的氧化物转化的第二厚度。 该方法还包括去除氧化物层以在阱区上形成形貌特征。 地形特征包括较高和较低部分的表面图案。 更高的部分对应于非植入区域的位置，并且下部对应于植入的子区域。

公开(公告)号：US20080085569A1

公开(公告)日：2008-04-10

申请号：US11531103

申请日：2006-09-12

申请人： Qingfeng Wang ,  Sameer P. Pendharkar ,  Binghua Hu

发明人： Qingfeng Wang ,  Sameer P. Pendharkar ,  Binghua Hu

IPC分类号： H01L21/66

CPC分类号： H01L22/12 ,  H01L29/0649 ,  H01L29/8605

摘要： Embodiments provide a method and device for electrically monitoring trench depths in semiconductor devices. To electrically measure a trench depth, a pinch resistor can be formed in a deep well region on a semiconductor substrate. A trench can then be formed in the pinch resistor. The trench depth can be determined by an electrical test of the pinch resistor. The disclosed method and device can provide statistical data analysis across a wafer and can be implemented in production scribe lanes as a process monitor. The disclosed method can also be useful for determining device performance of LDMOS transistors. The on-state resistance (Rdson) of the LDMOS transistors can be correlated to the electrical measurement of the trench depth.

摘要翻译： 实施例提供了用于电监测半导体器件中的沟槽深度的方法和装置。 为了电测量沟槽深度，可以在半导体衬底上的深阱区域中形成夹持电阻器。 然后可以在夹持电阻器中形成沟槽。 沟槽深度可以通过夹持电阻器的电气测试来确定。 所公开的方法和装置可以跨晶片提供统计数据分析，并且可以在作为过程监视器的生产划线中实施。 所公开的方法也可用于确定LDMOS晶体管的器件性能。 LDMOS晶体管的导通电阻（Rdson）可以与沟槽深度的电测量相关。

公开(公告)号：US20070048952A1

公开(公告)日：2007-03-01

申请号：US11552198

申请日：2006-10-24

申请人： Binghua Hu ,  Howard Lee ,  Henry Edwards ,  John Lin ,  Vladimir Bolkhovsky

发明人： Binghua Hu ,  Howard Lee ,  Henry Edwards ,  John Lin ,  Vladimir Bolkhovsky

IPC分类号： H01L21/336

CPC分类号： H01L21/266 ,  H01L21/2652 ,  H01L29/1095 ,  H01L29/42368 ,  H01L29/66681 ,  H01L29/7816

摘要： A double diffused region (65), (75), (85) is formed in an epitaxial layer (20). The double diffused region is formed by first implanting light implant specie such as boron through an opening in a photoresist layer prior to a hard bake process. Subsequent to a hard bake process heavy implant specie such as arsenic can be implanted into the epitaxial layer. During subsequent processing such as LOCOS formation the double diffused region is formed. A dielectric layer (120) is formed on the epitaxial layer (20) and gate structures (130), (135) are formed over the dielectric layer (120).

摘要翻译： 在外延层（20）中形成双扩散区域（65），（75），（85）。 通过在硬烘烤过程之前首先将诸如硼的光注入物质在光致抗蚀剂层中的开口注入，形成双扩散区域。 在硬烘烤过程之后，可以将诸如砷的重植入物种植入外延层中。 在后续处理（如LOCOS形成）中形成双扩散区。 在外延层（20）上形成介电层（120），并且在电介质层（120）之上形成栅极结构（130），（135）。

公开(公告)号：US09293357B2

公开(公告)日：2016-03-22

申请号：US13540542

申请日：2012-07-02

申请人： Binghua Hu ,  Sameer Pendharkar ,  Guru Mathur ,  Takehito Tamura

发明人： Binghua Hu ,  Sameer Pendharkar ,  Guru Mathur ,  Takehito Tamura

IPC分类号： H01L29/49 ,  H01L21/762 ,  H01L29/06 ,  H01L21/02 ,  H01L21/265 ,  H01L21/283 ,  H01L21/3205

CPC分类号： H01L21/76224 ,  H01L21/02109 ,  H01L21/265 ,  H01L21/283 ,  H01L21/32055 ,  H01L21/76232 ,  H01L29/0619

摘要： The width of a heavily-doped sinker is substantially reduced by forming the heavily-doped sinker to lie in between a number of closely-spaced trench isolation structures, which have been formed in a semiconductor material. During drive-in, the closely-spaced trench isolation structures significantly limit the lateral diffusion.

摘要翻译： 通过形成重掺杂沉降片位于已形成于半导体材料中的多个紧密间隔的沟槽隔离结构之间，大大减小了重掺杂沉降片的宽度。 在进入期间，紧密间隔的沟槽隔离结构显着限制了横向扩散。

公开(公告)号：US09076760B2

公开(公告)日：2015-07-07

申请号：US13597439

申请日：2012-08-29

申请人： Binghua Hu ,  Pinghai Hao ,  Sameer Pendharkar

发明人： Binghua Hu ,  Pinghai Hao ,  Sameer Pendharkar

IPC分类号： G01R31/26 ,  H01L29/417 ,  H01L21/00 ,  H01L29/423 ,  H01L29/808 ,  H01L29/06 ,  H01L29/10

CPC分类号： H01L29/41725 ,  G06F2101/00 ,  G06F2201/00 ,  H01L21/00 ,  H01L29/0692 ,  H01L29/1066 ,  H01L29/42316 ,  H01L29/808

摘要： A junction field-effect transistor (JFET) includes a substrate having a first-type semiconductor surface including a topside surface, and a top gate of a second-type formed in the semiconductor surface. A first-type drain and a first-type source are formed on opposing sides of the top gate. A first deep trench isolation region has an inner first trench wall and an outer first trench wall surrounding the top gate, the drain and the source, and extends vertically to a deep trench depth from the topside surface. A second-type sinker formed in semiconductor surface extends laterally outside the outer first trench wall. The sinker extends vertically from the topside surface to a second-type deep portion which is both below the deep trench depth and laterally inside the inner first trench wall to provide a bottom gate.

摘要翻译： 结型场效应晶体管（JFET）包括具有包括顶侧表面的第一类型半导体表面的衬底和形成在半导体表面中的第二类型的顶栅。 第一型漏极和第一型源形成在顶栅的相对侧上。 第一深沟槽隔离区域具有围绕顶部栅极，漏极和源极的内部第一沟槽壁和外部第一沟槽壁，并且从顶侧表面垂直延伸到深沟槽深度。 形成在半导体表面中的第二类型沉降片在外部第一沟槽壁的外侧横向延伸。 沉降片从顶侧表面垂直延伸到第二类型深部，该深部位于深沟槽深度的下方并且在内部第一沟槽壁的横向内部以提供底部门。

公开(公告)号：US08551886B2

公开(公告)日：2013-10-08

申请号：US12100118

申请日：2008-04-09

申请人： Kyle P. Hunt ,  Leila Elvira Noriega ,  Billy Alan Wofford ,  Asadd M. Hosein ,  Binghua Hu ,  Xinfen Chen

发明人： Kyle P. Hunt ,  Leila Elvira Noriega ,  Billy Alan Wofford ,  Asadd M. Hosein ,  Binghua Hu ,  Xinfen Chen

IPC分类号： H01L21/302 ,  H01L21/3105

CPC分类号： H01L21/31051 ,  H01L21/31053 ,  H01L21/31055 ,  H01L21/31056 ,  H01L21/76229 ,  H01L21/76232

摘要： A method for semiconductor processing is provided wherein a workpiece having an underlying body and a plurality of features extending therefrom, is provided. A first set of the plurality of features extend from the underlying body to a first plane, and a second set of the plurality features extend from the underlying body to a second plane. A protection layer overlies each of the plurality of features and an isolation layer overlies the underlying body and protection layer, wherein the isolation has a non-uniform first oxide density associated therewith. The isolation layer anisotropically etched based on a predetermined pattern, and then isotropically etched, wherein a second oxide density of the isolation layer is substantially uniform across the workpiece. The predetermined pattern is based, at least in part, on a desired oxide density, a location and extension of the plurality of features to the first and second planes.

摘要翻译： 提供了一种用于半导体处理的方法，其中具有下面的主体的工件和从其延伸的多个特征被提供。 所述多个特征的第一组从下面的本体延伸到第一平面，并且所述多个特征的第二组从下面的本体延伸到第二平面。 保护层覆盖多个特征中的每一个，并且隔离层覆盖下面的主体和保护层，其中隔离具有与其相关联的不均匀的第一氧化物密度。 基于预定图案各向异性蚀刻，然后各向同性蚀刻的隔离层，其中隔离层的第二氧化物密度在整个工件上基本均匀。 该预定图案至少部分地基于期望的氧化物密度，多个特征到第一和第二平面的位置和延伸。

公开(公告)号：US20110275168A1

公开(公告)日：2011-11-10

申请号：US12776057

申请日：2010-05-07

申请人： Eugene C. Davis ,  Binghua Hu ,  Sopa Chevacharoenkul ,  Prakash D. Dev

发明人： Eugene C. Davis ,  Binghua Hu ,  Sopa Chevacharoenkul ,  Prakash D. Dev

IPC分类号： H01L21/66 ,  H01L21/306

CPC分类号： C09G1/02 ,  H01L21/31053 ,  H01L21/3212 ,  H01L22/12 ,  H01L22/26

摘要： A one-step CMP process for polishing three or more layer film stacks on a wafer having a multilayer film stack thereon including a silicon nitride (SiNx) layer on its semiconductor surface, and a silicon oxide layer on the SiNx layer, wherein trench access vias extend through the silicon oxide layer and SiNx layer to trenches formed into the semiconductor surface, and wherein a polysilicon layer fills the trench access vias, fills the trenches, and is on the silicon oxide layer. CMP polishes the multilayer film stack with a slurry including slurry particles including at least one of silica and ceria. The CMP provides a removal rate (RR) for the polysilicon layer>a RR for the silicon oxide layer>a RR for the SiNx layer. The CMP process is continued to remove the polysilicon layer, silicon oxide layer and a portion of the SiNx layer to stop on the SiNx layer. Optical endpointing during CMP can provide a predetermined remaining thickness range for the SiNx layer.

摘要翻译： 一种用于在其上具有多层膜堆叠的晶片上的三层或更多层膜堆叠的半导体表面上的氮化硅（SiNx）层和SiN x层上的氧化硅层的一步CMP工艺，其中沟槽通孔 延伸穿过硅氧化物层和SiNx层到形成半导体表面的沟槽，并且其中多晶硅层填充沟槽接通通孔，填充沟槽并且在氧化硅层上。 CMP用包括二氧化硅和二氧化铈中的至少一种的浆料颗粒的浆料抛光多层膜堆叠。 CMP提供多晶硅层的去除率（RR）>硅氧化物层的RR> SiNx层的RR。 继续进行CMP处理以去除SiN x层上的多晶硅层，氧化硅层和SiNx层的一部分。 CMP期间的光学终点可以为SiNx层提供预定的剩余厚度范围。

公开(公告)号：US20110111569A1

公开(公告)日：2011-05-12

申请号：US13006589

申请日：2011-01-14

申请人： Marie Denison ,  Sameer Pendharkar ,  Binghua Hu ,  Taylor Rice Efland ,  Sridhar Seetharaman

发明人： Marie Denison ,  Sameer Pendharkar ,  Binghua Hu ,  Taylor Rice Efland ,  Sridhar Seetharaman

IPC分类号： H01L21/336

CPC分类号： H01L29/7825 ,  H01L29/0653 ,  H01L29/0696 ,  H01L29/086 ,  H01L29/0865 ,  H01L29/0869 ,  H01L29/0878 ,  H01L29/42368 ,  H01L29/42376 ,  H01L29/4238 ,  H01L29/66689 ,  H01L29/66704

摘要： An integrated circuit containing an MOS transistor with a trenched gate abutting an isolation dielectric layer over a drift region. The body well and source diffused region overlap the bottom surface of the gate trench. An integrated circuit containing an MOS transistor with a first trenched gate abutting an isolation dielectric layer over a drift region, and a second trenched gate located over a heavily doped buried layer. The buried layer is the same conductivity type as the drift region. A process of forming an integrated circuit containing an MOS transistor, which includes an isolation dielectric layer over a drift region of a drain of the transistor, and a gate formed in a gate trench which abuts the isolation dielectric layer. The gate trench is formed by removing substrate material adjacent to the isolation dielectric layer.

摘要翻译： 一种包含MOS晶体管的集成电路，其具有与漂移区上的隔离电介质层邻接的沟槽栅极。 体阱和源极扩散区域与栅极沟槽的底表面重叠。 一种包含MOS晶体管的集成电路，其具有与漂移区上的隔离电介质层邻接的第一沟槽栅极和位于重掺杂掩埋层上方的第二沟槽栅极。 埋层是与漂移区相同的导电类型。 形成包含MOS晶体管的集成电路的过程，其包括在晶体管的漏极的漂移区上方的隔离电介质层和形成在栅极沟槽中的栅极，该栅极与隔离电介质层相邻。 通过去除与隔离电介质层相邻的衬底材料形成栅极沟槽。

公开(公告)号：US07893499B2

公开(公告)日：2011-02-22

申请号：US12417810

申请日：2009-04-03

申请人： Marie Denison ,  Sameer Pendharkar ,  Binghua Hu ,  Taylor Rice Efland ,  Sridhar Seetharaman

发明人： Marie Denison ,  Sameer Pendharkar ,  Binghua Hu ,  Taylor Rice Efland ,  Sridhar Seetharaman

IPC分类号： H01L29/66

CPC分类号： H01L29/7825 ,  H01L29/0653 ,  H01L29/0696 ,  H01L29/086 ,  H01L29/0865 ,  H01L29/0869 ,  H01L29/0878 ,  H01L29/42368 ,  H01L29/42376 ,  H01L29/4238 ,  H01L29/66689 ,  H01L29/66704

摘要： An integrated circuit containing an MOS transistor with a trenched gate abutting an isolation dielectric layer over a drift region. The body well and source diffused region overlap the bottom surface of the gate trench. An integrated circuit containing an MOS transistor with a first trenched gate abutting an isolation dielectric layer over a drift region, and a second trenched gate located over a heavily doped buried layer. The buried layer is the same conductivity type as the drift region. A process of forming an integrated circuit containing an MOS transistor, which includes an isolation dielectric layer over a drift region of a drain of the transistor, and a gate formed in a gate trench which abuts the isolation dielectric layer. The gate trench is formed by removing substrate material adjacent to the isolation dielectric layer.

摘要翻译： 一种包含MOS晶体管的集成电路，其具有与漂移区上的隔离电介质层邻接的沟槽栅极。 体阱和源极扩散区域与栅极沟槽的底表面重叠。 一种包含MOS晶体管的集成电路，其具有与漂移区上的隔离电介质层邻接的第一沟槽栅极和位于重掺杂掩埋层上方的第二沟槽栅极。 埋层是与漂移区相同的导电类型。 形成包含MOS晶体管的集成电路的过程，其包括在晶体管的漏极的漂移区上方的隔离电介质层和形成在栅极沟槽中的栅极，该栅极与隔离电介质层相邻。 通过去除与隔离电介质层相邻的衬底材料形成栅极沟槽。