公开(公告)号：US20060017092A1

公开(公告)日：2006-01-26

申请号：US10898273

申请日：2004-07-23

申请人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen ,  Chia-Shun Hsiao

发明人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen ,  Chia-Shun Hsiao

IPC分类号： H01L21/8242 ,  H01L21/336

CPC分类号： H01L27/11526 ,  H01L21/28273 ,  H01L27/105 ,  H01L27/11546 ,  H01L29/42324

摘要： Conventional fabrication of top oxide in an ONO-type memory cell stack usually produces Bird's Beak. Certain materials in the stack such as silicon nitrides are relatively difficult to oxidize. As a result oxidation does not proceed uniformly along the multi-layered height of the ONO-type stack. The present disclosure shows how radical-based fabrication of top-oxide of an ONO stack (i.e. by ISSG method) can help to reduce formation of Bird's Beak. More specifically, it is indicated that short-lived oxidizing agents (e.g., atomic oxygen) are able to better oxidize difficult to oxidize materials such as silicon nitride and the it is indicated that the short-lived oxidizing agents alternatively or additionally do not diffuse deeply through already oxidized layers of the ONO stack such as the lower silicon oxide layer. As a result, a more uniform top oxide dielectric can be fabricated with more uniform breakdown voltages along its height. Additionally, adjacent low and high voltage transistors may benefit from simultaneous formation of their gate dielectrics with use of the radical-based oxidizing method.

摘要翻译： ONO型记忆体堆叠中的顶层氧化物的常规制造通常产生Bird's Beak。 叠层中的某些材料如氮化硅相对难以氧化。 因此，氧化不会沿着ONO型堆叠的多层高度均匀地进行。 本公开显示了如何基于根基的ONO堆叠的顶部氧化物的制造（即通过ISSG方法）可以帮助减少Bird's Beak的形成。 更具体地，表明短寿命氧化剂（例如原子氧）能够更好地氧化难以氧化的材料，例如氮化硅，并且表明短寿命氧化剂交替地或另外不会扩散深 通过已经氧化的ONO堆叠层，例如较低的氧化硅层。 结果，可以制造更均匀的顶部氧化物电介质，沿其高度具有更均匀的击穿电压。 此外，相邻的低压和高压晶体管可以受益于使用基于自由基的氧化方法同时形成其栅极电介质。

公开(公告)号：US20050227437A1

公开(公告)日：2005-10-13

申请号：US10821100

申请日：2004-04-07

申请人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen ,  Chunchieh Huang ,  Jin-Ho Kim ,  Vei-Han Chan ,  Chung Leung ,  Chia-Shun Hsiao ,  George Kovall ,  Steven Yang

发明人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen ,  Chunchieh Huang ,  Jin-Ho Kim ,  Vei-Han Chan ,  Chung Leung ,  Chia-Shun Hsiao ,  George Kovall ,  Steven Yang

IPC分类号： H01L21/28 ,  H01L21/336 ,  H01L29/423 ,  H01L29/51 ,  H01L29/788

CPC分类号： H01L21/28273 ,  H01L29/42328 ,  H01L29/513 ,  H01L29/7881

摘要： Conventional fabrication of sidewall oxide around an ONO-type memory cell stack usually produces Bird's Beak because prior to the fabrication, there is an exposed sidewall of the ONO-type memory cell stack that exposes side parts of a plurality of material layers respectively composed of different materials. Certain materials in the stack such as silicon nitrides are more difficult to oxidize than other materials in the stack such polysilicon. As a result oxidation does not proceed uniformly along the multi-layered height of the sidewall. The present disclosure shows how radical-based fabrication of sidewall dielectric can help to reduce the Bird's Beak formation. More specifically, it is indicated that short-lived oxidizing agents (e.g., atomic oxygen) are able to better oxidize difficult to oxidize materials such as silicon nitride and the it is indicated that the short-lived oxidizing agents alternatively or additionally do not diffuse as deeply through already oxidized layers of the sidewall such as silicon oxide layers. As a result, a more uniform sidewall dielectric can be fabricated with more uniform breakdown voltages along it height.

摘要翻译： 通常在ONO型存储单元堆叠周围制造侧壁氧化物通常产生鸟喙，因为在制造之前，存在ONO型存储单元堆叠的暴露的侧壁，其暴露分别由不同的多个材料层组成的多个材料层的侧面部分 材料 堆叠中的某些材料如氮化硅比堆叠中的其它材料更难以氧化，这样的多晶硅。 结果，氧化不沿着侧壁的多层高度均匀地进行。 本公开显示了基于侧壁电介质的基于基础的制造有助于减少鸟喙形成。 更具体地，表明短寿命氧化剂（例如原子氧）能够更好地氧化难以氧化的材料如氮化硅，并且表明短寿命氧化剂交替地或另外不扩散为 深深地通过侧壁的已氧化层，例如氧化硅层。 结果，可以制造更均匀的侧壁电介质，沿其高度具有更均匀的击穿电压。

公开(公告)号：US07297597B2

公开(公告)日：2007-11-20

申请号：US10898273

申请日：2004-07-23

申请人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen ,  Chia-Shun Hsiao

发明人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen ,  Chia-Shun Hsiao

IPC分类号： H01L21/336

CPC分类号： H01L27/11526 ,  H01L21/28273 ,  H01L27/105 ,  H01L27/11546 ,  H01L29/42324

摘要： Conventional fabrication of top oxide in an ONO-type memory cell stack usually produces Bird's Beak. Certain materials in the stack such as silicon nitrides are relatively difficult to oxidize. As a result oxidation does not proceed uniformly along the multi-layered height of the ONO-type stack. The present disclosure shows how radical-based fabrication of top-oxide of an ONO stack (i.e. by ISSG method) can help to reduce formation of Bird's Beak. More specifically, it is indicated that short-lived oxidizing agents (e.g., atomic oxygen) are able to better oxidize difficult to oxidize materials such as silicon nitride and the it is indicated that the short-lived oxidizing agents alternatively or additionally do not diffuse deeply through already oxidized layers of the ONO stack such as the lower silicon oxide layer. As a result, a more uniform top oxide dielectric can be fabricated with more uniform breakdown voltages along its height. Additionally, adjacent low and high voltage transistors may benefit from simultaneous formation of their gate dielectrics with use of the radical-based oxidizing method.

摘要翻译： ONO型记忆体堆叠中的顶层氧化物的常规制造通常产生Bird's Beak。 叠层中的某些材料如氮化硅相对难以氧化。 因此，氧化不会沿着ONO型堆叠的多层高度均匀地进行。 本公开显示了如何基于根基的ONO堆叠的顶部氧化物的制造（即通过ISSG方法）可以帮助减少Bird's Beak的形成。 更具体地，表明短寿命氧化剂（例如原子氧）能够更好地氧化难以氧化的材料，例如氮化硅，并且表明短寿命氧化剂交替地或另外不会扩散深 通过已经氧化的ONO堆叠层，例如较低的氧化硅层。 结果，可以制造更均匀的顶部氧化物电介质，沿其高度具有更均匀的击穿电压。 此外，相邻的低压和高压晶体管可以受益于使用基于自由基的氧化方法同时形成其栅极电介质。

公开(公告)号：US07910429B2

公开(公告)日：2011-03-22

申请号：US10821100

申请日：2004-04-07

申请人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen ,  Chunchieh Huang ,  Jin-Ho Kim ,  Vei-Han Chan ,  Chung Wai Leung ,  Chia-Shun Hsiao ,  George Kovall ,  Steven Ming Yang

发明人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen ,  Chunchieh Huang ,  Jin-Ho Kim ,  Vei-Han Chan ,  Chung Wai Leung ,  Chia-Shun Hsiao ,  George Kovall ,  Steven Ming Yang

IPC分类号： H01L21/336

CPC分类号： H01L21/28273 ,  H01L29/42328 ,  H01L29/513 ,  H01L29/7881

摘要： Conventional fabrication of sidewall oxide around an ONO-type memory cell stack usually produces Bird's Beak because prior to the fabrication, there is an exposed sidewall of the ONO-type memory cell stack that exposes side parts of a plurality of material layers respectively composed of different materials. Certain materials in the stack such as silicon nitrides are more difficult to oxidize than other materials in the stack such polysilicon. As a result oxidation does not proceed uniformly along the multi-layered height of the sidewall. The present disclosure shows how radical-based fabrication of sidewall dielectric can help to reduce the Bird's Beak formation. More specifically, it is indicated that short-lived oxidizing agents (e.g., atomic oxygen) are able to better oxidize difficult to oxidize materials such as silicon nitride and the it is indicated that the short-lived oxidizing agents alternatively or additionally do not diffuse as deeply through already oxidized layers of the sidewall such as silicon oxide layers. As a result, a more uniform sidewall dielectric can be fabricated with more uniform breakdown voltages along it height.

摘要翻译： 通常在ONO型存储单元堆叠周围制造侧壁氧化物通常产生鸟喙，因为在制造之前，存在ONO型存储单元堆叠的暴露的侧壁，其暴露分别由不同的多个材料层组成的多个材料层的侧面部分 材料 堆叠中的某些材料如氮化硅比堆叠中的其它材料更难以氧化，这样的多晶硅。 结果，氧化不沿着侧壁的多层高度均匀地进行。 本公开显示了基于侧壁电介质的基于基础的制造有助于减少鸟喙形成。 更具体地，表明短寿命氧化剂（例如原子氧）能够更好地氧化难以氧化的材料如氮化硅，并且表明短寿命氧化剂交替地或另外不扩散为 深深地通过侧壁的已氧化层，例如氧化硅层。 结果，可以制造更均匀的侧壁电介质，沿其高度具有更均匀的击穿电压。

公开(公告)号：US07001810B2

公开(公告)日：2006-02-21

申请号：US10769025

申请日：2004-01-30

申请人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen

发明人： Zhong Dong ,  Chuck Jang ,  Ching-Hwa Chen

IPC分类号： H01L21/336 ,  H01L21/26

CPC分类号： H01L29/66825 ,  H01L21/28273

摘要： The floating gate, or the oxide between the floating and control gates, or both are nitrided before the control gate layer is deposited.

公开(公告)号：US20060008997A1

公开(公告)日：2006-01-12

申请号：US11197562

申请日：2005-08-04

申请人： Chuck Jang ,  Zhong Dong ,  Vei-Han Chan ,  Ching-Hwa Chen

发明人： Chuck Jang ,  Zhong Dong ,  Vei-Han Chan ,  Ching-Hwa Chen

IPC分类号： H01L21/336

CPC分类号： H01L21/02164 ,  H01L21/02178 ,  H01L21/022 ,  H01L21/02211 ,  H01L21/02271 ,  H01L21/0228 ,  H01L21/02307 ,  H01L21/28211 ,  H01L21/3162 ,  H01L21/31683 ,  H01L29/40114 ,  H01L29/511

摘要： Aluminum oxide is deposited by atomic layer deposition to form a high-k dielectric for the interpoly dielectric layer of a non-volatile memory device. The increased capacitive coupling can allow a thicker oxide layer to be used between the floating gate and the control gate, resulting in improved reliability and longer lifetime of the memory cells fabricated according to this invention.

公开(公告)号：US07122415B2

公开(公告)日：2006-10-17

申请号：US10243379

申请日：2002-09-12

申请人： Chuck Jang ,  Zhong Dong ,  Vei-Han Chan ,  Ching-Hwa Chen

发明人： Chuck Jang ,  Zhong Dong ,  Vei-Han Chan ,  Ching-Hwa Chen

IPC分类号： H01L21/8238

CPC分类号： H01L21/02164 ,  H01L21/02178 ,  H01L21/022 ,  H01L21/02211 ,  H01L21/02271 ,  H01L21/0228 ,  H01L21/02307 ,  H01L21/28211 ,  H01L21/28273 ,  H01L21/3162 ,  H01L21/31683 ,  H01L29/511

摘要： Aluminum oxide is deposited by atomic layer deposition to form a high-k dielectric for the interpoly dielectric layer of a non-volatile memory device. The increased capacitive coupling can allow a thicker oxide layer to be used between the floating gate and the control gate, resulting in improved reliability and longer lifetime of the memory cells fabricated according to this invention.

摘要翻译： 通过原子层沉积沉积氧化铝以形成用于非易失性存储器件的多晶硅介电层的高k电介质。 增加的电容耦合可以允许在浮动栅极和控制栅极之间使用较厚的氧化物层，从而提高根据本发明制造的存储器单元的可靠性和更长寿命。

公开(公告)号：US07071127B2

公开(公告)日：2006-07-04

申请号：US10442759

申请日：2003-05-20

申请人： Zhong Dong ,  Chuck Jang ,  Chia-Shun Hsiao

发明人： Zhong Dong ,  Chuck Jang ,  Chia-Shun Hsiao

IPC分类号： H01L21/469

CPC分类号： H01L21/02164 ,  H01L21/02211 ,  H01L21/02271 ,  H01L21/02337 ,  H01L21/28158 ,  H01L21/3105 ,  H01L21/31612

摘要： A method and apparatus are disclosed for reducing the concentration of chlorine and/or other bound contaminants within a semiconductor oxide composition that is formed by chemical vapor deposition (CVD) using a semiconductor-element-providing reactant such as dichlorosilane (DCS) and an oxygen-providing reactant such as N2O. In one embodiment, a DCS-HTO film is annealed by heating N2O gas to a temperature in the range of about 825° C. to about 950° C. so as to trigger exothermic decomposition of the N2O gas and flowing the heated gas across the DCS-HTO film so that disassociated atomic oxygen radicals within the heated N2O gas can transfer disassociating energy to chlorine atoms bound within the DCS-HTO film and so that the atomic oxygen radicals can fill oxygen vacancies within the semiconductor-oxide matrix of DCS-HTO film. An improved ONO structure may be formed with the annealed DCS-HTO film for use in floating gate or other memory applications.

摘要翻译： 公开了一种方法和装置，用于降低通过化学气相沉积（CVD）形成的半导体氧化物组合物中的氯和/或其它结合的污染物的浓度，所述半导体氧化物组合物使用提供半导体元素的反应物如二氯硅烷（DCS）和氧 提供反应物如N 2 O。 在一个实施方案中，通过将N 2 O 2气体加热至约825℃至约950℃的温度来退火DCS-HTO膜，以引发放热分解 N 2 O气体并使加热的气体流过DCS-HTO膜，使得加热的N 2 O气体内的解离的原子氧自由基能够将分解能量转移到结合的氯原子上 在DCS-HTO膜内，使得原子氧自由基可以填充DCS-HTO膜的半导体氧化物基质内的氧空位。 可以用退火的DCS-HTO膜形成改进的ONO结构，用于浮动栅极或其他存储器应用中。

公开(公告)号：US06849897B2

公开(公告)日：2005-02-01

申请号：US10423162

申请日：2003-04-24

申请人： Zhong Dong ,  Chuck Jang

发明人： Zhong Dong ,  Chuck Jang

IPC分类号： H01L21/28 ,  H01L21/314 ,  H01L21/336 ,  H01L29/51 ,  H01L29/78

CPC分类号： H01L29/788 ,  H01L21/28273 ,  H01L21/3144 ,  H01L21/3145 ,  H01L29/511 ,  H01L29/66825

摘要： A thin buffer layer of SiON is formed on the top surface of the floating gate, in order to protect the polysilicon surface from attack by atomic chlorine produced during the formation of the high temperature oxide of the ONO stack. The buffer layer can also be formed on other dielectric surfaces which are otherwise subject to adverse conditions in subsequent processing, such as the nitride layer in the ONO dielectric stack.

摘要翻译： 在浮栅的顶表面上形成有薄的缓冲层SiON，以便保护多晶硅表面免受在ONO堆叠的高温氧化物形成过程中产生的原子氯的侵蚀。 缓冲层也可以形成在其它电介质表面上，否则在后续处理中会受到不利条件的影响，例如ONO电介质叠层中的氮化物层。

公开(公告)号：US07229880B2

公开(公告)日：2007-06-12

申请号：US10718008

申请日：2003-11-19

申请人： Zhong Dong ,  Chuck Jang ,  Chunchieh Huang

发明人： Zhong Dong ,  Chuck Jang ,  Chunchieh Huang

IPC分类号： H01L21/336

CPC分类号： H01L29/511 ,  H01L21/28273

摘要： An ONO-type inter-poly insulator is formed by depositing intrinsic silicon on an oxidation stop layer. In one embodiment, the oxidation stop layer is a nitridated top surface of a lower, and conductively-doped, polysilicon layer. In one embodiment, atomic layer deposition (ALD) is used to precisely control the thickness of the deposited, intrinsic silicon. Heat and an oxidizing atmosphere are used to convert the deposited, intrinsic silicon into thermally-grown, silicon dioxide. The oxidation stop layer impedes deeper oxidation. A silicon nitride layer and an additional silicon oxide layer are further deposited to complete the ONO structure before an upper, and conductively-doped, polysilicon layer is formed. In one embodiment, the lower and upper polysilicon layers are patterned to respectively define a floating gate (FG) and a control gate (CG) of an electrically re-programmable memory cell. In an alternative embodiment, after the middle, silicon nitride of the ONO structure is defined, another layer of intrinsic silicon is deposited, by way of for example, ALD. Heat and an oxidizing atmosphere are used to convert the second deposited, intrinsic silicon into thermally-grown, silicon dioxide. An ONO structure with two thermally-grown, and spaced apart, silicon oxide layers is thereby provided.

摘要翻译： 通过在氧化停止层上沉积本征硅来形成ONO型多晶硅绝缘体。 在一个实施方案中，氧化停止层是较低且导电掺杂的多晶硅层的氮化顶表面。 在一个实施例中，原子层沉积（ALD）用于精确控制沉积的本征硅的厚度。 使用热和氧化气氛将沉积的本征硅转化成热生长的二氧化硅。 氧化停止层阻碍更深的氧化。 在形成上部和导电掺杂的多晶硅层之前，进一步沉积氮化硅层和另外的氧化硅层以完成ONO结构。 在一个实施例中，下部和上部多晶硅层被图案化以分别限定电可重新编程的存储器单元的浮动栅极（FG）和控制栅极（CG）。 在替代实施例中，在中间形成ONO结构的氮化硅之后，通过例如ALD沉积另一层本征硅。 使用热和氧化气氛将第二沉积的本征硅转化成热生长的二氧化硅。 由此提供具有两个热生长和间隔开的氧化硅层的ONO结构。