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1. WO2020140190 - THREE-DIMENSIONAL MEMORY DEVICES HAVING THROUGH STAIR CONTACTS AND METHODS FOR FORMING THE SAME

Publication Number WO/2020/140190
Publication Date 09.07.2020
International Application No. PCT/CN2019/070009
International Filing Date 02.01.2019
IPC
H01L 21/768 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
21Processes or apparatus specially adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
70Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in or on a common substrate or of specific parts thereof; Manufacture of integrated circuit devices or of specific parts thereof
71Manufacture of specific parts of devices defined in group H01L21/7086
768Applying interconnections to be used for carrying current between separate components within a device
H01L 23/538 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
23Details of semiconductor or other solid state devices
52Arrangements for conducting electric current within the device in operation from one component to another
538the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates
H01L 27/11548 2017.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
27Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
02including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
04the substrate being a semiconductor body
10including a plurality of individual components in a repetitive configuration
105including field-effect components
112Read-only memory structures
115Electrically programmable read-only memories; Multistep manufacturing processes therefor
11517with floating gate
11548characterised by the boundary region between the core and peripheral circuit regions
H01L 27/11551 2017.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
27Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
02including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
04the substrate being a semiconductor body
10including a plurality of individual components in a repetitive configuration
105including field-effect components
112Read-only memory structures
115Electrically programmable read-only memories; Multistep manufacturing processes therefor
11517with floating gate
11551characterised by three-dimensional arrangements, e.g. with cells on different height levels
H01L 27/11575 2017.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
27Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
02including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
04the substrate being a semiconductor body
10including a plurality of individual components in a repetitive configuration
105including field-effect components
112Read-only memory structures
115Electrically programmable read-only memories; Multistep manufacturing processes therefor
11563with charge-trapping gate insulators, e.g. MNOS or NROM
11575characterised by the boundary region between the core and peripheral circuit regions
H01L 27/11578 2017.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
27Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
02including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
04the substrate being a semiconductor body
10including a plurality of individual components in a repetitive configuration
105including field-effect components
112Read-only memory structures
115Electrically programmable read-only memories; Multistep manufacturing processes therefor
11563with charge-trapping gate insulators, e.g. MNOS or NROM
11578characterised by three-dimensional arrangements, e.g. with cells on different height levels
CPC
H01L 21/76802
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
21Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
70Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
71Manufacture of specific parts of devices defined in group H01L21/70
768Applying interconnections to be used for carrying current between separate components within a device ; comprising conductors and dielectrics
76801characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
76802by forming openings in dielectrics
H01L 21/76805
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
21Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
70Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
71Manufacture of specific parts of devices defined in group H01L21/70
768Applying interconnections to be used for carrying current between separate components within a device ; comprising conductors and dielectrics
76801characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
76802by forming openings in dielectrics
76805the opening being a via or contact hole penetrating the underlying conductor
H01L 21/76831
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
21Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
70Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
71Manufacture of specific parts of devices defined in group H01L21/70
768Applying interconnections to be used for carrying current between separate components within a device ; comprising conductors and dielectrics
76801characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
76829characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
76831in via holes or trenches, e.g. non-conductive sidewall liners
H01L 21/76877
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
21Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
70Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
71Manufacture of specific parts of devices defined in group H01L21/70
768Applying interconnections to be used for carrying current between separate components within a device ; comprising conductors and dielectrics
76838characterised by the formation and the after-treatment of the conductors
76877Filling of holes, grooves or trenches, e.g. vias, with conductive material
H01L 23/5226
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
23Details of semiconductor or other solid state devices
52Arrangements for conducting electric current within the device in operation from one component to another ; , i.e. interconnections, e.g. wires, lead frames
522including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
5226Via connections in a multilevel interconnection structure
H01L 27/11565
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
27Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
02including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
04the substrate being a semiconductor body
10including a plurality of individual components in a repetitive configuration
105including field-effect components
112Read-only memory structures ; [ROM] and multistep manufacturing processes therefor
115Electrically programmable read-only memories; Multistep manufacturing processes therefor
11563with charge-trapping gate insulators, e.g. MNOS or NROM
11565characterised by the top-view layout
Applicants
  • YANGTZE MEMORY TECHNOLOGIES CO., LTD. [CN]/[CN]
Inventors
  • WEI, Qinxiang
  • SUN, Jianhua
  • XIA, Ji
Agents
  • NTD UNIVATION INTELLECTUAL PROPERTY AGENCY LTD.
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) THREE-DIMENSIONAL MEMORY DEVICES HAVING THROUGH STAIR CONTACTS AND METHODS FOR FORMING THE SAME
(FR) DISPOSITIFS DE MÉMOIRE TRIDIMENSIONNELS COMPORTANT DES CONTACTS EN ESCALIER TRAVERSANTS ET LEURS PROCÉDÉS DE FORMATION
Abstract
(EN)
Embodiments of three-dimensional (3D) memory devices having through stair contacts (TSCs) and methods for forming the same are disclosed. In an example, a method for forming a 3D memory device (100) is disclosed. A dielectric stack (104) including a plurality of interleaved dielectric layers (112) and sacrificial layers (110) is formed on a substrate (102). A staircase structure (142) is formed on one side of the dielectric stack (104). A dummy hole extending vertically through the staircase structure (142) and reaching the substrate (102) is formed. A spacer (138) having a hollow core is formed in the dummy hole. A TSC (136) in contact with the substrate (102) is formed by depositing a conductor layer (140) in the hollow core of the spacer (138). The TSC (136) extends vertically through the staircase structure (142).
(FR)
L'invention concerne des modes de réalisation de dispositifs de mémoire tridimensionnels (3D) comportant des contacts en escalier traversants (CET) et des procédés de formation de ceux-ci. Un exemple de l'invention porte sur un procédé pour former un dispositif de mémoire tridimensionnel (100). Un empilement diélectrique (104) comprenant une pluralité de couches diélectriques entrelacées (112) et de couches sacrificielles (110) est formé sur un substrat (102). Une structure en escalier (142) est formée sur un côté de l'empilement diélectrique (104). Un trou factice s'étendant verticalement à travers la structure en escalier (142) et atteignant le substrat (102) est formé. Un espaceur (138) ayant un noyau creux est formé dans le trou factice. Un contact en escalier traversant (136) en contact avec le substrat (102) est formé par dépôt d'une couche conductrice (140) dans le noyau creux de l'espaceur (138). Le contact en escalier traversant (136) s'étend verticalement à travers la structure en escalier (142).
Also published as
EP2019907062
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