公开(公告)号：US11309328B2

公开(公告)日：2022-04-19

申请号：US16667719

申请日：2019-10-29

Applicant: Micron Technology, Inc.

Inventor： Shuangqiang Luo ,  Indra V. Chary ,  Justin B. Dorhout

IPC: H01L21/00 ,  H01L27/11582 ,  H01L27/11519 ,  H01L27/11524 ,  G11C16/08 ,  H01L27/11565 ,  H01L27/1157 ,  H01L27/11556

Abstract: A method of forming a microelectronic device comprises forming a microelectronic device structure. The microelectronic device structure comprises a stack structure comprising insulative structures and additional insulative structures vertically alternating with the insulative structures, a dielectric structure vertically extending partially through the stack structure, and a dielectric material vertically overlying and horizontally extending across the stack structure and the dielectric structure. Portions of at least the dielectric material and the dielectric structure are removed to form a trench vertically overlying and at least partially horizontally overlapping a remaining portion of the dielectric structure. The trench is substantially filled with additional dielectric material. Microelectronic devices, memory devices, and electronic systems are also described.

公开(公告)号：US20220059569A1

公开(公告)日：2022-02-24

申请号：US17517459

申请日：2021-11-02

Applicant: Micron Technology, Inc.

Inventor： Jordan D. Greenlee ,  Daniel Billingsley ,  Indra V. Chary ,  Rita J. Klein

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

Abstract: A memory array comprising strings of memory cells comprises laterally-spaced memory blocks individually comprising a vertical stack comprising alternating insulative tiers and conductive tiers. Operative channel-material strings of memory cells extend through the insulative tiers and the conductive tiers. Upper masses comprise first material laterally-between and longitudinally-spaced-along immediately-laterally-adjacent of the memory blocks and second material laterally-between and longitudinally-spaced-along the immediately-laterally-adjacent memory blocks longitudinally-between and under the upper masses. The second material is of different composition from that of the first material. The second material comprises insulative material. Other embodiments, including method, are disclosed.

公开(公告)号：US20220037360A1

公开(公告)日：2022-02-03

申请号：US17504313

申请日：2021-10-18

Applicant: Micron Technology, Inc.

Inventor： Paolo Tessariol ,  Justin B. Dorhout ,  Indra V. Chary ,  Jun Fang ,  Matthew Park ,  Zhiqiang Xie ,  Scott D. Stull ,  Daniel Osterberg ,  Jason Reece ,  Jian Li

IPC: H01L27/11582 ,  H01L21/768 ,  H01L21/311 ,  H01L23/528 ,  H01L27/11556 ,  H01L21/02 ,  H01L29/10 ,  H01L23/522 ,  H01L27/11575

Abstract: A device comprises an array of elevationally-extending transistors and a circuit structure adjacent and electrically coupled to the elevationally-extending transistors of the array. The circuit structure comprises a stair step structure comprising vertically-alternating tiers comprising conductive steps that are at least partially elevationally separated from one another by insulative material. Operative conductive vias individually extend elevationally through one of the conductive steps at least to a bottom of the vertically-alternating tiers and individually electrically couple to an electronic component below the vertically-alternating tiers. Dummy structures individually extend elevationally through one of the conductive steps at least to the bottom of the vertically-alternating tiers. Methods are also disclosed.

公开(公告)号：US20220013534A1

公开(公告)日：2022-01-13

申请号：US16922792

申请日：2020-07-07

Applicant: Micron Technology, Inc.

Inventor： Anilkumar Chandolu ,  Indra V. Chary

IPC: H01L27/11582 ,  H01L27/11556 ,  H01L27/11524 ,  H01L27/1157 ,  H01L27/11565 ,  H01L27/11519

Abstract: Microelectronic devices include a stack structure with a vertically alternating sequence of insulative structures and conductive structures arranged in tiers. Conductive contact structures extend through the stack structure. An insulative material is between the conductive contact structures and the tiers of the stack structure. In a lower tier portion of the stack structure, a conductive structure, of the conductive structures, has a portion extending a first width between a pair of the conductive contact structures. In a portion of the stack structure above the lower tier portion, an additional conductive structure, of the conductive structures, has an additional portion extending a second width between the pair of the conductive contact structures. The second width is greater than the first width. Related methods and electronic systems are also disclosed.

公开(公告)号：US20210257385A1

公开(公告)日：2021-08-19

申请号：US17215308

申请日：2021-03-29

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 ,  H01L27/11565 ,  H01L27/11573 ,  H01L21/3213 ,  H01L27/11556

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：US20210057441A1

公开(公告)日：2021-02-25

申请号：US16550252

申请日：2019-08-25

Applicant: Micron Technology, Inc.

Inventor： Lifang Xu ,  Indra V. Chary ,  Justin B. Dorhout ,  Jian Li ,  Haitao Liu ,  Paolo Tessariol

IPC: H01L27/11582 ,  H01L27/11524 ,  H01L27/11556 ,  H01L27/1157 ,  H01L23/522 ,  H01L23/528 ,  H01L21/768

Abstract: A memory array comprising strings of memory cells comprises laterally-spaced memory blocks individually comprising a vertical stack comprising alternating insulative tiers and conductive tiers. Operative channel-material strings of memory cells extend through the insulative tiers and the conductive tiers. The operative channel-material strings in the laterally-spaced memory blocks comprise part of a memory plane. An elevationally-extending wall is in the memory plane laterally-between immediately-laterally-adjacent of the memory blocks and that completely encircles an island that is laterally-between immediately-laterally-adjacent of the memory blocks in the memory plane. Other embodiments, including method are disclosed.

公开(公告)号：US10727242B2

公开(公告)日：2020-07-28

申请号：US16372563

申请日：2019-04-02

Applicant: Micron Technology, Inc.

Inventor： Justin B. Dorhout ,  Kunal R. Parekh ,  Matthew Park ,  Joseph Neil Greeley ,  Chet E. Carter ,  Martin C. Roberts ,  Indra V. Chary ,  Vinayak Shamanna ,  Ryan Meyer ,  Paolo Tessariol

IPC: H01L27/11 ,  H01L27/11556 ,  H01L27/11573 ,  H01L27/11519 ,  H01L27/11565 ,  H01L27/11582

Abstract: An array of elevationally-extending strings of memory cells, where the memory cells individually comprise a programmable charge storage transistor, comprises a substrate comprising a first region containing memory cells and a second region not containing memory cells laterally of the first region. The first region comprises vertically-alternating tiers of insulative material and control gate material. The second region comprises vertically-alternating tiers of different composition insulating materials laterally of the first region. A channel pillar comprising semiconductive channel material extends elevationally through multiple of the vertically-alternating tiers within the first region. Tunnel insulator, programmable charge storage material, and control gate blocking insulator are between the channel pillar and the control gate material of individual of the tiers of the control gate material within the first region. Conductive vias extend elevationally through the vertically-alternating tiers in the second region. An elevationally-extending wall is laterally between the first and second regions. The wall comprises the programmable charge storage material and the semiconductive channel material. Other embodiments and aspects, including method, are disclosed.

公开(公告)号：US20200161187A1

公开(公告)日：2020-05-21

申请号：US16749443

申请日：2020-01-22

Applicant: Micron Technology, Inc.

Inventor： Anilkumar Chandolu ,  Matthew J. King ,  Indra V. Chary ,  Darwin A. Clampitt

IPC: H01L21/8234 ,  H01L27/11556

Abstract: A method of forming a semiconductor device comprises forming sacrificial structures and support pillars. The sacrificial structures comprise an isolated sacrificial structure in a slit region and connected sacrificial structures in a pillar region. Tiers are formed over the sacrificial structures and support pillars, and a portion of the tiers are removed to form tier pillars and tier openings, exposing the connected sacrificial structures and support pillars. The connected sacrificial structures are removed to form a cavity, a portion of the cavity extending below the isolated sacrificial structure. A cell film is formed over the tier pillars and over sidewalls of the cavity. A fill material is formed in the tier openings and over the cell film. A portion of the tiers in the slit region is removed, exposing the isolated sacrificial structure, which is removed to form a source opening. The source opening is connected to the cavity and a conductive material is formed in the source opening and in the cavity. Semiconductor devices and systems are also disclosed.

公开(公告)号：US10014309B2

公开(公告)日：2018-07-03

申请号：US15231950

申请日：2016-08-09

Applicant: Micron Technology, Inc.

Inventor： Justin B. Dorhout ,  Kunal R. Parekh ,  Matthew Park ,  Joseph Neil Greeley ,  Chet E. Carter ,  Martin C. Roberts ,  Indra V. Chary ,  Vinayak Shamanna ,  Ryan Meyer ,  Paolo Tessariol

IPC: H01L21/336 ,  H01L27/11556 ,  H01L27/11519 ,  H01L27/11582 ,  H01L27/11565

CPC classification number: H01L27/11556 ,  H01L27/11519 ,  H01L27/11565 ,  H01L27/11573 ,  H01L27/11582

Abstract: An array of elevationally-extending strings of memory cells, where the memory cells individually comprise a programmable charge storage transistor, comprises a substrate comprising a first region containing memory cells and a second region not containing memory cells laterally of the first region. The first region comprises vertically-alternating tiers of insulative material and control gate material. The second region comprises vertically-alternating tiers of different composition insulating materials laterally of the first region. A channel pillar comprising semiconductive channel material extends elevationally through multiple of the vertically-alternating tiers within the first region. Tunnel insulator, programmable charge storage material, and control gate blocking insulator are between the channel pillar and the control gate material of individual of the tiers of the control gate material within the first region. Conductive vias extend elevationally through the vertically-alternating tiers in the second region. An elevationally-extending wall is laterally between the first and second regions. The wall comprises the programmable charge storage material and the semiconductive channel material. Other embodiments and aspects, including method, are disclosed.

公开(公告)号：US12224240B2

公开(公告)日：2025-02-11

申请号：US17396939

申请日：2021-08-09

Applicant: Micron Technology, Inc.

Inventor： S M Istiaque Hossain ,  Indra V. Chary ,  Anilkumar Chandolu ,  Sidhartha Gupta ,  Shuangqiang Luo

IPC: H01L23/528 ,  H01L21/768 ,  H01L23/522 ,  H01L23/532 ,  H10B41/20 ,  H10B41/35 ,  H10B43/20 ,  H10B43/35

Abstract: A microelectronic device, including a stack structure including alternating conductive structures and dielectric structures is disclosed. Memory pillars extend through the stack structure. Contacts are laterally adjacent to the memory pillars and extending through the stack structure. The contacts including active contacts and support contacts. The active contacts including a liner and a conductive material. The support contacts including the liner and a dielectric material. The conductive material of the active contacts is in electrical communication with the memory pillars. Methods and electronic systems are also disclosed.