公开(公告)号：US20210043644A1

公开(公告)日：2021-02-11

申请号：US16532019

申请日：2019-08-05

Applicant: Micron Technology, Inc.

Inventor： Yi Hu ,  Merri L. Carlson ,  Anilkumar Chandolu ,  Indra V. Chary ,  David Daycock ,  Harsh Narendrakumar Jain ,  Matthew J. King ,  Jian Li ,  Brett D. Lowe ,  Prakash Rau Mokhna Rau ,  Lifang Xu

IPC: H01L27/11582 ,  H01L21/311 ,  H01L21/02 ,  H01L27/11526 ,  H01L27/11519 ,  H01L27/11556 ,  H01L27/11565 ,  H01L27/11573 ,  H01L21/3213

Abstract: A method used in forming a memory array comprising strings of memory cells and operative through-array-vias (TAVs) comprises forming a stack comprising vertically-alternating insulative tiers and conductive tiers. The stack comprises a TAV region and an operative memory-cell-string region. The TAV region comprises spaced operative TAV areas. Operative channel-material strings are formed in the stack in the operative memory-cell-string region and dummy channel-material strings are formed in the stack in the TAV region laterally outside of and not within the operative TAV areas. Operative TAVs are formed in individual of the spaced operative TAV areas in the TAV region. Other methods and structure independent of method are disclosed.

公开(公告)号：US10665599B2

公开(公告)日：2020-05-26

申请号：US16371988

申请日：2019-04-01

Applicant: Micron Technology, Inc.

Inventor： Hongbin Zhu ,  Gordon A. Haller ,  Charles H. Dennison ,  Anish A. Khandekar ,  Brett D. Lowe ,  Lining He ,  Brian Cleereman

IPC: H01L27/115 ,  H01L27/11556 ,  H01L27/11582 ,  H01L27/11524 ,  H01L27/1157

Abstract: Some embodiments include a method of forming vertically-stacked memory cells. An opening is formed through a stack of alternating insulative and conductive levels. Cavities are formed to extend into the conductive levels along sidewalls of the opening. At least one of the cavities is formed to be shallower than one or more others of the cavities. Charge-blocking dielectric and charge-storage structures are formed within the cavities. Some embodiments include an integrated structure having a stack of alternating insulative and conductive levels. Cavities extend into the conductive levels. At least one of the cavities is shallower than one or more others of the cavities by at least about 2 nanometers. Charge-blocking dielectric is within the cavities. Charge-storage structures are within the cavities.

公开(公告)号：US10658380B2

公开(公告)日：2020-05-19

申请号：US16160146

申请日：2018-10-15

Applicant: Micron Technology, Inc.

Inventor： Matthew J. King ,  Anilkumar Chandolu ,  Indra V. Chary ,  Darwin A. Clampitt ,  Gordon Haller ,  Thomas George ,  Brett D. Lowe ,  David A. Daycock

IPC: H01L27/115 ,  H01L27/11582 ,  H01L27/1157 ,  H01L27/11526 ,  H01L27/11556 ,  H01L27/11524 ,  H01L27/11573

Abstract: In an example, a method of forming a stacked memory array includes forming a stack of alternating first and second dielectrics, forming a termination structure through the stack, the termination structure comprising a dielectric liner around a conductor, forming a set of contacts concurrently with forming the termination structure, forming a third dielectric over an upper surface of the stack and an upper surface of the termination structure, forming a first opening through the third dielectric and the stack between first and second groups of semiconductor structures so that the first opening exposes an upper surface of the conductor, and removing the conductor from the termination structure to form a second opening lined with the dielectric liner. In some examples, the dielectric liner can include a rectangular or a triangular tab or a pair of prongs that can have a rectangular profile or that can be tapered.

公开(公告)号：US20190386021A1

公开(公告)日：2019-12-19

申请号：US16553587

申请日：2019-08-28

Applicant: Micron Technology, Inc.

Inventor： Roger W. Lindsay ,  Michael A. Smith ,  Brett D. Lowe

IPC: H01L27/11582 ,  H01L27/11524 ,  H01L27/11575 ,  H01L27/11556 ,  H01L23/522 ,  H01L23/528 ,  H01L21/311 ,  H01L21/768 ,  H01L21/027 ,  H01L21/033

Abstract: A method of forming a semiconductor device structure comprises forming a stack structure comprising stacked tiers. Each of the stacked tiers comprises a first structure comprising a first material and a second structure comprising a second, different material longitudinally adjacent the first structure. A patterned hard mask structure is formed over the stack structure. Dielectric structures are formed within openings in the patterned hard mask structure. A photoresist structure is formed over the dielectric structures and the patterned hard mask structure. The photoresist structure, the dielectric structures, and the stack structure are subjected to a series of material removal processes to form apertures extending to different depths within the stack structure. Dielectric structures are formed over side surfaces of the stack structure within the apertures. Conductive contact structures are formed to longitudinally extend to bottoms of the apertures. Semiconductor device structures, semiconductor devices, and electronic systems are also described.

公开(公告)号：US10446579B2

公开(公告)日：2019-10-15

申请号：US16183392

申请日：2018-11-07

Applicant: Micron Technology, Inc.

Inventor： Roger W. Lindsay ,  Michael A. Smith ,  Brett D. Lowe

IPC: H01L27/11582 ,  H01L21/768 ,  H01L21/033 ,  H01L21/027 ,  H01L21/311 ,  H01L23/528 ,  H01L23/522 ,  H01L27/11556 ,  H01L27/11575 ,  H01L27/11524 ,  H01L27/11565 ,  H01L27/1157 ,  H01L27/11573

Abstract: A method of forming a semiconductor device structure comprises forming a stack structure comprising stacked tiers. Each of the stacked tiers comprises a first structure comprising a first material and a second structure comprising a second, different material longitudinally adjacent the first structure. A patterned hard mask structure is formed over the stack structure. Dielectric structures are formed within openings in the patterned hard mask structure. A photoresist structure is formed over the dielectric structures and the patterned hard mask structure. The photoresist structure, the dielectric structures, and the stack structure are subjected to a series of material removal processes to form apertures extending to different depths within the stack structure. Dielectric structures are formed over side surfaces of the stack structure within the apertures. Conductive contact structures are formed to longitudinally extend to bottoms of the apertures. Semiconductor device structures, semiconductor devices, and electronic systems are also described.

公开(公告)号：US20190229126A1

公开(公告)日：2019-07-25

申请号：US16371988

申请日：2019-04-01

Applicant: Micron Technology, Inc.

Inventor： Hongbin Zhu ,  Gordon A. Haller ,  Charles H. Dennison ,  Anish A. Khandekar ,  Brett D. Lowe ,  Lining He ,  Brian Cleereman

IPC: H01L27/11556 ,  H01L27/1157 ,  H01L27/11582 ,  H01L27/11524

CPC classification number: H01L27/11556 ,  H01L27/11524 ,  H01L27/1157 ,  H01L27/11582

Abstract: Some embodiments include a method of forming vertically-stacked memory cells. An opening is formed through a stack of alternating insulative and conductive levels. Cavities are formed to extend into the conductive levels along sidewalls of the opening. At least one of the cavities is formed to be shallower than one or more others of the cavities. Charge-blocking dielectric and charge-storage structures are formed within the cavities. Some embodiments include an integrated structure having a stack of alternating insulative and conductive levels. Cavities extend into the conductive levels. At least one of the cavities is shallower than one or more others of the cavities by at least about 2 nanometers. Charge-blocking dielectric is within the cavities. Charge-storage structures are within the cavities.

公开(公告)号：US20180219021A1

公开(公告)日：2018-08-02

申请号：US15422335

申请日：2017-02-01

Applicant: Micron Technology, Inc.

Inventor： David Daycock ,  Richard J. Hill ,  Christopher Larsen ,  Woohee Kim ,  Justin B. Dorhout ,  Brett D. Lowe ,  John D. Hopkins ,  Qian Tao ,  Barbara L. Casey

IPC: H01L27/11582 ,  H01L27/1157 ,  H01L29/10 ,  H01L29/423 ,  H01L21/28

CPC classification number: H01L27/11582 ,  H01L21/28282 ,  H01L27/1157 ,  H01L29/1037 ,  H01L29/4234

Abstract: Some embodiments include a memory array which has a vertical stack of alternating insulative levels and wordline levels. The wordline levels have terminal ends corresponding to control gate regions. Charge-trapping material is along the control gate regions of the wordline levels and not along the insulative levels. The charge-trapping material is spaced from the control gate regions by charge-blocking material. Channel material extends vertically along the stack and is laterally spaced from the charge-trapping material by dielectric material. Some embodiments include methods of forming NAND memory arrays.

公开(公告)号：US20130249050A1

公开(公告)日：2013-09-26

申请号：US13893454

申请日：2013-05-14

Applicant: Micron Technology, Inc.

Inventor： James Mathew ,  Brett D. Lowe ,  Yunjun Ho ,  H. Jim Fulford ,  Jie Sun ,  Zhaoli Sun

IPC: H01L29/06

CPC classification number: H01L29/0649 ,  H01L21/02164 ,  H01L21/022 ,  H01L21/02222 ,  H01L21/02271 ,  H01L21/02282 ,  H01L21/02326 ,  H01L21/02337 ,  H01L21/76229 ,  H01L27/11526 ,  H01L27/11573

Abstract: A method of forming memory array and peripheral circuitry isolation includes chemical vapor depositing a silicon dioxide-comprising liner over sidewalls of memory array circuitry isolation trenches and peripheral circuitry isolation trenches formed in semiconductor material. Dielectric material is flowed over the silicon dioxide-comprising liner to fill remaining volume of the array isolation trenches and to form a dielectric liner over the silicon dioxide-comprising liner in at least some of the peripheral isolation trenches. The dielectric material is furnace annealed at a temperature no greater than about 500° C. The annealed dielectric material is rapid thermal processed to a temperature no less than about 800° C. A silicon dioxide-comprising material is chemical vapor deposited over the rapid thermal processed dielectric material to fill remaining volume of said at least some peripheral isolation trenches. Other aspects are disclosed, including integrated circuitry resulting from the disclosed methods and integrated circuitry independent of method of manufacture.

Abstract translation: 形成存储器阵列和外围电路隔离的方法包括在存储器阵列电路隔离沟槽的侧壁和在半导体材料中形成的外围电路隔离沟槽的化学气相沉积包含二氧化硅的衬垫。 电介质材料流过含二氧化硅的衬垫以填充阵列隔离沟槽的剩余体积，并在至少一些外围隔离沟槽中的含二氧化硅的衬垫上形成电介质衬垫。 电介质材料在不大于约500℃的温度下进行炉退火。退火的电介质材料被快速热处理至不低于约800℃的温度。含二氧化硅的材料经快速热化学气相沉积 处理的介电材料以填充所述至少一些外围隔离沟槽的剩余体积。 公开了其它方面，包括由公开的方法产生的集成电路和独立于制造方法的集成电路。