公开(公告)号：US20120292692A1

公开(公告)日：2012-11-22

申请号：US13559502

申请日：2012-07-26

申请人： Yeeheng Lee ,  Yongping Ding ,  John Chen

发明人： Yeeheng Lee ,  Yongping Ding ,  John Chen

IPC分类号： H01L29/786

CPC分类号： H01L29/7813 ,  H01L21/26586 ,  H01L29/1095 ,  H01L29/41766 ,  H01L29/456 ,  H01L29/47 ,  H01L29/66719 ,  H01L29/66727 ,  H01L29/66734 ,  H01L29/782

摘要： A power MOSFET device and manufacturing method thereof, includes the steps of selectively depositing a first conductive material in the middle region at the bottom of a contact trench and contacting with light-doped N-type epitaxial layer to form a Schottky junction and depositing a second conductive material at the side wall and bottom corner of the contact trench and contacting with P-type heavy-doped body region to form an ohmic junction. The first and second conductive materials can respectively optimize the performance of the ohmic contact and the Schottky contact without compromise. Meanwhile, the corner of the contact trench is surrounded by P-type heavy-doped region thereby effectively reducing the leakage currents accumulated at the corner of the contact trench.

摘要翻译： 功率MOSFET器件及其制造方法包括以下步骤：在接触沟槽的底部的中间区域选择性地沉积第一导电材料，并与光掺杂的N型外延层接触以形成肖特基结，并沉积第二导电材料 导电材料在接触沟槽的侧壁和底角处并与P型重掺杂体区域接触以形成欧姆结。 第一和第二导电材料可以分别优化欧姆接触和肖特基接触的性能而不折不扣。 同时，接触沟槽的角部被P型重掺杂区域围绕，从而有效地减少了在接触沟槽的拐角处积聚的漏电流。

公开(公告)号：US08587061B2

公开(公告)日：2013-11-19

申请号：US13559502

申请日：2012-07-26

申请人： Yeeheng Lee ,  Yongping Ding ,  John Chen

发明人： Yeeheng Lee ,  Yongping Ding ,  John Chen

IPC分类号： H01L29/66

CPC分类号： H01L29/7813 ,  H01L21/26586 ,  H01L29/1095 ,  H01L29/41766 ,  H01L29/456 ,  H01L29/47 ,  H01L29/66719 ,  H01L29/66727 ,  H01L29/66734 ,  H01L29/782

摘要： A power MOSFET device and manufacturing method thereof, includes the steps of selectively depositing a first conductive material in the middle region at the bottom of a contact trench and contacting with light-doped N-type epitaxial layer to form a Schottky junction and depositing a second conductive material at the side wall and bottom corner of the contact trench and contacting with P-type heavy-doped body region to form an ohmic junction. The first and second conductive materials can respectively optimize the performance of the ohmic contact and the Schottky contact without compromise. Meanwhile, the corner of the contact trench is surrounded by P-type heavy-doped region thereby effectively reducing the leakage currents accumulated at the corner of the contact trench.

摘要翻译： 功率MOSFET器件及其制造方法包括以下步骤：在接触沟槽的底部的中间区域选择性地沉积第一导电材料，并与光掺杂的N型外延层接触以形成肖特基结，并沉积第二导电材料 导电材料在接触沟槽的侧壁和底角处并与P型重掺杂体区域接触以形成欧姆结。 第一和第二导电材料可以分别优化欧姆接触和肖特基接触的性能而不折不扣。 同时，接触沟槽的角部被P型重掺杂区域围绕，从而有效地减少了在接触沟槽的拐角处积聚的漏电流。

公开(公告)号：US20110316076A1

公开(公告)日：2011-12-29

申请号：US12826591

申请日：2010-06-29

申请人： Yeeheng Lee ,  Yongping Ding ,  John Chen

发明人： Yeeheng Lee ,  Yongping Ding ,  John Chen

IPC分类号： H01L29/78 ,  H01L21/336

CPC分类号： H01L29/7813 ,  H01L21/26586 ,  H01L29/1095 ,  H01L29/41766 ,  H01L29/456 ,  H01L29/47 ,  H01L29/66719 ,  H01L29/66727 ,  H01L29/66734 ,  H01L29/782

摘要： A power MOSFET device and manufacturing method thereof, includes the steps of selectively depositing a first conductive material in the middle region at the bottom of a contact trench and contacting with light-doped N-type epitaxial layer to form a Schottky junction and depositing a second conductive material at the side wall and bottom corner of the contact trench and contacting with P-type heavy-doped body region to form an ohmic junction. The first and second conductive materials can respectively optimize the performance of the ohmic contact and the Schottky contact without compromise. Meanwhile, the corner of the contact trench is surrounded by P-type heavy-doped region thereby effectively reducing the leakage currents accumulated at the corner of the contact trench.

摘要翻译： 功率MOSFET器件及其制造方法包括以下步骤：在接触沟槽的底部的中间区域选择性地沉积第一导电材料，并与光掺杂的N型外延层接触以形成肖特基结，并沉积第二导电材料 导电材料在接触沟槽的侧壁和底角处并与P型重掺杂体区域接触以形成欧姆结。 第一和第二导电材料可以分别优化欧姆接触和肖特基接触的性能而不折不扣。 同时，接触沟槽的角部被P型重掺杂区域围绕，从而有效地减少了在接触沟槽的拐角处积聚的漏电流。

公开(公告)号：US08252648B2

公开(公告)日：2012-08-28

申请号：US12826591

申请日：2010-06-29

申请人： Yeeheng Lee ,  Yongping Ding ,  John Chen

发明人： Yeeheng Lee ,  Yongping Ding ,  John Chen

IPC分类号： H01L21/336

CPC分类号： H01L29/7813 ,  H01L21/26586 ,  H01L29/1095 ,  H01L29/41766 ,  H01L29/456 ,  H01L29/47 ,  H01L29/66719 ,  H01L29/66727 ,  H01L29/66734 ,  H01L29/782

摘要： A power MOSFET device and manufacturing method thereof, includes the steps of selectively depositing a first conductive material in the middle region at the bottom of a contact trench and contacting with light-doped N-type epitaxial layer to form a Schottky junction and depositing a second conductive material at the side wall and bottom corner of the contact trench and contacting with P-type heavy-doped body region to form an ohmic junction. The first and second conductive materials can respectively optimize the performance of the ohmic contact and the Schottky contact without compromise. Meanwhile, the corner of the contact trench is surrounded by P-type heavy-doped region thereby effectively reducing the leakage currents accumulated at the corner of the contact trench.

摘要翻译： 功率MOSFET器件及其制造方法包括以下步骤：在接触沟槽的底部的中间区域选择性地沉积第一导电材料，并与光掺杂的N型外延层接触以形成肖特基结，并沉积第二导电材料 导电材料在接触沟槽的侧壁和底角处并与P型重掺杂体区域接触以形成欧姆结。 第一和第二导电材料可以分别优化欧姆接触和肖特基接触的性能而不折不扣。 同时，接触沟槽的角部被P型重掺杂区域围绕，从而有效地减少了在接触沟槽的拐角处积聚的漏电流。

公开(公告)号：US09755052B2

公开(公告)日：2017-09-05

申请号：US14011078

申请日：2013-08-27

申请人： Yongping Ding ,  Sik Lui ,  Madhur Bobde ,  Lei Zhang ,  Jongoh Kim ,  John Chen

发明人： Yongping Ding ,  Sik Lui ,  Madhur Bobde ,  Lei Zhang ,  Jongoh Kim ,  John Chen

IPC分类号： H01L21/265 ,  H01L29/739 ,  H01L29/78 ,  H01L29/66 ,  H01L29/06 ,  H01L29/40 ,  H01L29/10

CPC分类号： H01L29/66666 ,  H01L21/26586 ,  H01L29/0623 ,  H01L29/0696 ,  H01L29/1095 ,  H01L29/407 ,  H01L29/66333 ,  H01L29/66348 ,  H01L29/66712 ,  H01L29/7395 ,  H01L29/7397 ,  H01L29/7802 ,  H01L29/7813

摘要： A semiconductor power device disposed on a semiconductor substrate comprises a plurality of trenches formed at a top portion of the semiconductor substrate extending laterally across the semiconductor substrate along a longitudinal direction each having a nonlinear portion comprising a sidewall perpendicular to a longitudinal direction of the trench and extends vertically downward from a top surface to a trench bottom surface. The semiconductor power device further includes a trench bottom dopant region disposed below the trench bottom surface and a sidewall dopant region disposed along the perpendicular sidewall wherein the sidewall dopant region extends vertically downward along the perpendicular sidewall of the trench to reach the trench bottom dopant region and pick-up the trench bottom dopant region to the top surface of the semiconductor substrate.

公开(公告)号：US20140332844A1

公开(公告)日：2014-11-13

申请号：US13892191

申请日：2013-05-10

申请人： Yongping Ding ,  Lei Zhang ,  Hong Chang ,  Jongoh Kim ,  John Chen

发明人： Yongping Ding ,  Lei Zhang ,  Hong Chang ,  Jongoh Kim ,  John Chen

IPC分类号： H01L21/265 ,  H01L29/78 ,  H01L29/739

CPC分类号： H01L29/78 ,  H01L21/2652 ,  H01L21/26586 ,  H01L29/66348 ,  H01L29/66666 ,  H01L29/7827

摘要： This invention discloses a semiconductor power device disposed in a semiconductor substrate. The semiconductor power device comprises a plurality of trenches each having a trench endpoint with an endpoint sidewall perpendicular to a longitudinal direction of the trench and extends vertically downward from a top surface to a trench bottom surface. The semiconductor power device further includes a trench bottom dopant region disposed below the trench bottom surface and a sidewall dopant region disposed along the endpoint sidewall wherein the sidewall dopant region extends vertically downward along the endpoint sidewall of the trench to reach the trench bottom dopant region and pick-up the trench bottom dopant region to the top surface of the semiconductor substrate.

摘要翻译： 本发明公开了一种设置在半导体衬底中的半导体功率器件。 半导体功率器件包括多个沟槽，每个沟槽具有沟槽端点，端点侧壁垂直于沟槽的纵向方向并且从顶表面垂直向下延伸到沟槽底表面。 半导体功率器件还包括设置在沟槽底表面下方的沟槽底部掺杂剂区域和沿端点侧壁设置的侧壁掺杂剂区域，其中侧壁掺杂剂区域沿着沟槽的端点侧壁垂直向下延伸以到达沟槽底部掺杂剂区域，并且 将沟槽底部掺杂剂区域拾取到半导体衬底的顶表面。

公开(公告)号：US20150060936A1

公开(公告)日：2015-03-05

申请号：US14011078

申请日：2013-08-27

申请人： Yongping Ding ,  Sik Lui ,  Madhur Bobde ,  Lei Zhang ,  Jongoh Kim ,  John Chen

发明人： Yongping Ding ,  Sik Lui ,  Madhur Bobde ,  Lei Zhang ,  Jongoh Kim ,  John Chen

IPC分类号： H01L21/265 ,  H01L29/78 ,  H01L29/66 ,  H01L29/739

CPC分类号： H01L29/66666 ,  H01L21/26586 ,  H01L29/0623 ,  H01L29/0696 ,  H01L29/1095 ,  H01L29/407 ,  H01L29/66333 ,  H01L29/66348 ,  H01L29/66712 ,  H01L29/7395 ,  H01L29/7397 ,  H01L29/7802 ,  H01L29/7813

摘要： This invention discloses a semiconductor power device disposed in a semiconductor substrate. The semiconductor power device comprises a plurality of trenches formed at a top portion of the semiconductor substrate extending laterally across the semiconductor substrate along a longitudinal direction each having a nonlinear portion comprising a sidewall perpendicular to a longitudinal direction of the trench and extends vertically downward from a top surface to a trench bottom surface. The semiconductor power device further includes a trench bottom dopant region disposed below the trench bottom surface and a sidewall dopant region disposed along the perpendicular sidewall wherein the sidewall dopant region extends vertically downward along the perpendicular sidewall of the trench to reach the trench bottom dopant region and pick-up the trench bottom dopant region to the top surface of the semiconductor substrate.

摘要翻译： 本发明公开了一种设置在半导体衬底中的半导体功率器件。 半导体功率器件包括形成在半导体衬底的顶部的多个沟槽，其沿着纵向方向横向跨越半导体衬底延伸，每个具有非线性部分，该非线性部分包括垂直于沟槽的纵向方向的侧壁，并且垂直向下延伸 顶面到沟槽底面。 半导体功率器件还包括设置在沟槽底表面下方的沟槽底部掺杂剂区域和沿着垂直侧壁设置的侧壁掺杂剂区域，其中侧壁掺杂剂区域沿着沟槽的垂直侧壁垂直向下延伸以到达沟槽底部掺杂剂区域， 将沟槽底部掺杂剂区域拾取到半导体衬底的顶表面。

公开(公告)号：US09887283B2

公开(公告)日：2018-02-06

申请号：US13892191

申请日：2013-05-10

申请人： Yongping Ding ,  Lei Zhang ,  Hong Chang ,  Jongoh Kim ,  John Chen

发明人： Yongping Ding ,  Lei Zhang ,  Hong Chang ,  Jongoh Kim ,  John Chen

IPC分类号： H01L29/78 ,  H01L29/66 ,  H01L21/265

CPC分类号： H01L29/78 ,  H01L21/2652 ,  H01L21/26586 ,  H01L29/66348 ,  H01L29/66666 ,  H01L29/7827

摘要： This invention discloses a semiconductor power device disposed in a semiconductor substrate. The semiconductor power device comprises a plurality of trenches each having a trench endpoint with an endpoint sidewall perpendicular to a longitudinal direction of the trench and extends vertically downward from a top surface to a trench bottom surface. The semiconductor power device further includes a trench bottom dopant region disposed below the trench bottom surface and a sidewall dopant region disposed along the endpoint sidewall wherein the sidewall dopant region extends vertically downward along the endpoint sidewall of the trench to reach the trench bottom dopant region and pick-up the trench bottom dopant region to the top surface of the semiconductor substrate.

公开(公告)号：US20100291744A1

公开(公告)日：2010-11-18

申请号：US12847863

申请日：2010-07-30

申请人： Yeeheng Lee ,  Hong Chang ,  Tiesheng Li ,  John Chen ,  Anup Bhalla

发明人： Yeeheng Lee ,  Hong Chang ,  Tiesheng Li ,  John Chen ,  Anup Bhalla

IPC分类号： H01L21/336

CPC分类号： H01L29/66621 ,  H01L21/26586 ,  H01L29/4236 ,  H01L29/78

摘要： Trench gate MOSFET devices may be formed using a single mask to define gate trenches and body contact trenches. A hard mask is formed on a surface of a semiconductor substrate. A trench mask is applied on the hard mask to predefine a body contact trench and a gate trench. These predefined trenches are simultaneously etched into the substrate to a first predetermined depth. A gate trench mask is next applied on top of the hard mask. The gate trench mask covers the body contact trenches and has openings at the gate trenches. The gate trench, but not the body contact trench, is etched to a second predetermined depth. Conductive material of a first kind may fill the gate trench to form a gate. Conductive material of a second kind may fill the body contact trench to form a body contact.

摘要翻译： 沟槽栅极MOSFET器件可以使用单个掩模形成以限定栅极沟槽和主体接触沟槽。 在半导体基板的表面上形成硬掩模。 在硬掩模上施加沟槽掩模以预定义接触沟槽和栅极沟槽。 这些预定沟槽同时被蚀刻到衬底中到达第一预定深度。 接下来将栅极沟槽掩模施加在硬掩模的顶部上。 栅极沟槽掩模覆盖主体接触沟槽并且在栅极沟槽处具有开口。 栅极沟槽而不是体接触沟槽被蚀刻到第二预定深度。 第一种导电材料可以填充栅沟以形成栅极。 第二种导电材料可以填充身体接触沟槽以形成身体接触。

公开(公告)号：US20110147830A1

公开(公告)日：2011-06-23

申请号：US12643837

申请日：2009-12-21

申请人： John Chen ,  Yeeheng Lee ,  Lingpeng Guan ,  Moses Ho ,  Wilson Ma ,  Anup Bhalla ,  Hamza Yilmaz

发明人： John Chen ,  Yeeheng Lee ,  Lingpeng Guan ,  Moses Ho ,  Wilson Ma ,  Anup Bhalla ,  Hamza Yilmaz

IPC分类号： H01L29/78 ,  H01L21/336

CPC分类号： H01L29/66636 ,  H01L21/26586 ,  H01L29/0615 ,  H01L29/0634 ,  H01L29/0878 ,  H01L29/165 ,  H01L29/456 ,  H01L29/66719 ,  H01L29/78 ,  H01L29/7811

摘要： Self-aligned charge balanced semiconductor devices and methods for forming such devices are disclosed. One or more planar gates are formed over a semiconductor substrate of a first conductivity type. One or more deep trenches are etched in the semiconductor self-aligned to the planar gates. The trenches are filled with a semiconductor material of a second conductivity type such that the deep trenches are charge balanced with the adjacent regions of the semiconductor substrate This process can form self-aligned charge balanced devices with a cell pitch less than 12 microns.

摘要翻译： 公开了自对准电荷平衡半导体器件及其形成方法。 在第一导电类型的半导体衬底上形成一个或多个平面栅极。 在与平面栅极自对准的半导体中蚀刻一个或多个深沟槽。 沟槽填充有第二导电类型的半导体材料，使得深沟槽与半导体衬底的相邻区域电荷平衡。该工艺可以形成具有小于12微米的电池间距的自对准电荷平衡装置。