Sandisk Technologies Inc.

Sandisk 3d LLC

Rensselaer Polytechnic Institute

Pohang University of Science and Technology Foundation

Raghuveer S Makala

Rahul Sharangpani

Fei Zhou

Senaka Kanakamedala

Adarsh Rajashekhar

Yao-Sheng Lee

Yanli Zhang

Johann Alsmeier

George Matamis

Sateesh Koka

Ramy Nashed Bassely Said

Peter Rabkin

Somesh Peri

Ashish Kumar Baraskar

Jayavel Pachamuthu

Seung-Yeul Yang

James K Kai

Murshed Chowdhury

Jin Liu

Keerti Shukla

Kartik Sondhi

Henry Chien

Fumitaka Amano

Franz Kreupl

Wei Zhao

Masanori Tsutsumi

Naoki Takeguchi

Monica Titus

Masaaki Higashitani

Steven J Radigan

Vance Dunton

Deepak Chandra Sekar

Yung-Tin Chen

Peng Zhang

Bhagwati Prasad

Michael Konevecki

Zhenyu Lu

Srikanth Ranganathan

Kensuke Yamaguchi

Genta Mizuno

Yusuke Mukae

Paul Wai Kie Poon

Natalie Nguyen

Yingda Dong

Jiahui Yuan

Hiroyuki Kinoshita

Zhixin Cui

Xiying Costa

Chun Ge

Masanori Terahara

Yujin Terasawa

Jian Feng Chen

Christopher John Petti

Ching-Huang Lu

April Dawn Schricker

Tatsuya Hinoue

Michiaki Sano

Akio Nishida

Seiji Shimabukuro

Thomas Jongwan Kwon

Daxin Mao

Jingyan Zhang

Atsushi Suyama

Shigehisa Inoue

Tomoyuki Obu

Junichi Ariyoshi

Tiffany Santos

Hiroyuki Ogawa

Dana Lee

Tuan Duc Pham

Klaus Florian Schuegraf

George Samachisa

Tong Zhang

Michael L Chan

Takashi Whitney Orimoto

Wipul Jayasekara

Liang Pang

Wu-Yi Henry Chien

Steven Patrick Maxwell

Andrew C Lin

Kiyohiko Sakakibara

Abhijit Bandyopadhyay

Jixin Yu

Koichi Matsuno

Naohiro Hosoda

Xiying Chen

Yoichiro Tanaka

Kun Hou

Xue Bai Pitner

Kengo Kajiwara

Tomohiro Kubo

Tadashi Nakamura

Chu-Chen Fu

Matthias Baenninger

Lin Hou

Ryo Nakamura

Shigehiro Fujino

Kazuto Watanabe

Wenguang Shi

Marika Gunji-Yoneoka

A method of forming a memory device includes forming an alternating stack of insulating layers including a first insulating material and sacrificial material layers including a first sacrificial material over a substrate, forming a memory opening through the alternating stack, performing a first selective material deposition process that selectively grows a second sacrificial material from physically exposed surfaces of the sacrificial material layers to form a vertical stack of sacrificial material portions; forming a memory opening fill structure in the memory opening, where the memory opening fill structure includes a vertical stack of memory elements and a vertical semiconductor channel, and replacing a combination of the vertical stack of sacrificial material portions and the sacrificial material layers with electrically conductive layers.

Three-dimensional memory device and method of making thereof by non-conformal selective deposition of insulating spacers in a memory opening

A three dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate; memory stack structures vertically extending through the alternating stack; and a backside trench fill structure. The backside trench fill structure includes a backside trench insulating spacer and a backside contact via structure. The backside contact via structure may include a tapered metallic nitride liner and at least one core fill conductive material portion. Alternatively, the backside contact via structure may include a tungsten nitride liner, a metallic nitride liner other than tungsten nitride, and at least one core fill conductive material portion.

Three-dimensional memory device including composite backside metal fill structures and methods for forming the same

A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and containing a vertical semiconductor channel and a memory film. The memory film includes a tunneling dielectric layer, a continuous charge storage material layer vertically extending through a plurality of the electrically conductive layers, a vertical stack of discrete charge storage elements located at levels of the electrically conductive layers and contacting a respective surface segment of an outer sidewall of the continuous charge storage material layer, and a vertical stack of discrete blocking dielectric material portions containing silicon atoms and oxygen atoms and located at the levels of the electrically conductive layers and vertically spaced apart from each other.

Three-dimensional memory device containing engineered charge storage elements and methods for forming the same

A memory device includes an alternating stack of insulating layers and electrically conductive layers, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and including a vertical semiconductor channel and a memory film. The memory film includes a memory material layer having a straight inner cylindrical sidewall that vertically extends through a plurality of electrically conductive layers within the alternating stack without lateral undulation and a laterally-undulating outer sidewall having outward lateral protrusions at levels of the plurality of electrically conductive layers.

Three-dimensional memory device including discrete charge storage elements and methods of forming the same

A first-tier alternating stack of first-tier insulating layers and first-tier sacrificial material layers is formed over a substrate. A first-tier memory opening is formed, and is filled with a first-tier sacrificial memory opening fill structure. A second-tier alternating stack of second-tier insulating layers and second-tier sacrificial material layers is formed. An etch mask layer is formed, and a second-tier memory opening is formed through the second-tier alternating stack. An etch mask removal process is performed which collaterally removes a top portion of the first-tier sacrificial memory opening fill structure. A sacrificial pillar structure is formed by performing a selective material deposition process. An inter-tier memory opening is formed by removing the first-tier sacrificial memory opening fill structure and at least a central portion of the sacrificial pillar structure. A memory opening fill structure is formed, and the sacrificial material layers are replaced with electrically conductive layers.

Three-dimensional memory device and method of making thereof using sacrificial material regrowth

A method of forming a structure includes forming an alternating stack of first material layers and second material layers over a substrate, forming a first etch mask material layer, forming a first cladding liner, and forming a via opening through the alternating stack by performing an anisotropic etch process that employs a combination of at least the first cladding liner and the first etch mask material layer as a composite etch mask structure.

Method of making a three-dimensional memory device using composite hard masks for formation of deep via openings

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, memory openings vertically extending through the alternating stack, and memory opening fill structures located in the memory openings. Each of the memory opening fill structures includes a vertical stack of memory elements located at levels of the electrically conductive layers. Each of the electrically conductive layers includes a metallic barrier liner containing an intermetallic compound of at least two elements that includes a first metal element including Ta or Ti, and a second metal element including at least one of Al or Mo, and metallic barrier liner containing less than 10 atomic percent of nitrogen and oxygen, and a metallic fill material layer contacting the metallic barrier liner.

Three-dimensional memory device with intermetallic barrier liner and methods for forming the same

A memory device includes a first electrically conductive line laterally extending along a first horizontal direction, a memory pillar structure overlying and contacting the first electrically conductive line, the memory pillar structure includes a vertical stack of a ferroelectric material plate and a selector material plate, and a second electrically conductive line laterally extending along a second horizontal direction and overlying and contacting the memory pillar structure.

Bonded memory devices and methods of making the same

A semiconductor memory device includes an alternating stack of insulating layers and electrically conductive layers, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and including a vertical stack of discrete ferroelectric material portions and a vertical semiconductor channel. In one embodiment, the discrete ferroelectric material portions include a ferroelectric alloy material of a first dielectric metal oxide material and a second dielectric metal oxide material. In another embodiment, each of the discrete ferroelectric material portions is oxygen-deficient.

Memory device containing composition-controlled ferroelectric memory elements and method of making the same

A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers, memory openings vertically extending through the alternating stack, memory opening fill structures located in the memory openings and including a respective vertical semiconductor channel and a respective vertical stack of memory elements, and a first backside trench fill structure and a second backside trench fill structure. Each of the electrically conductive layers includes a respective metal nitride liner and a respective metal fill material region. The respective metal fill material region includes a respective first-thickness portion having a respective first vertical thickness and a respective second-thickness portion having a respective second vertical thickness that is greater than the respective first vertical thickness.

Three-dimensional memory device containing variable thickness word lines with reduced length metal nitride diffusion barriers and methods for forming the same

A semiconductor structure includes a doped single crystalline semiconductor material layer, a metal or metal alloy source contact layer located over a back side of the doped single crystalline semiconductor material layer, a dielectric isolation layer located over a front side of the doped single crystalline semiconductor material layer, an alternating stack of insulating layers and electrically conductive layers located over the dielectric isolation layer, a memory opening vertically extending through the alternating stack and the dielectric isolation layer and at least partially through the doped single crystalline semiconductor material layer, a memory film and a vertical semiconductor channel located within the memory opening, such that the vertical semiconductor channel vertically extends through the dielectric isolation layer and into the doped single crystalline semiconductor material layer, and a single crystalline semiconductor pedestal contacting the doped single crystalline semiconductor material layer and the vertical semiconductor channel.

Three-dimensional memory device containing epitaxial pedestals and top source contact

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and including a vertical stack of charge storage elements, a vertical semiconductor channel, a ferroelectric material layer located between the vertical stack of charge storage elements and the vertical semiconductor channel, and a blocking dielectric layer located between the ferroelectric material layer and the vertical semiconductor channel. A tunneling dielectric layer is located between at least one of the electrically conductive layers and the vertical stack of charge storage elements.

Three-dimensional memory device containing ferroelectric-assisted memory elements and method of making the same

A ferroelectric memory device includes an alternating stack of insulating layers and electrically conductive layers, a memory opening extending vertically through the alternating stack and including laterally-protruding portions at levels of the electrically conductive layers, and a memory opening fill structure located in the memory opening and containing a vertical semiconductor channel and a vertical stack of discrete ferroelectric memory structures located in the laterally-protruding portions of the memory opening. Each of the ferroelectric memory structures includes crystalline ferroelectric material portion and a crystalline template material portion located between a respective electrically conductive layer of the electrically conductive layers and the crystalline ferroelectric material portion.

Three-dimensional memory device containing templated crystalline ferroelectric memory elements and method of making thereof

A memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and comprising a vertical semiconductor channel and a memory film. The memory film includes a contoured blocking dielectric layer including sac-shaped lateral protrusions located at levels of the electrically conductive layers, a tunneling dielectric layer in contact with the vertical semiconductor channel, and a vertical stack of charge storage material portions located within volumes enclosed by the sac-shaped lateral protrusions.

Growing community of inventors

Campbell, CA, United States of America

Raghuveer S Makala