公开(公告)号：US11195845B2

公开(公告)日：2021-12-07

申请号：US17072480

申请日：2020-10-16

Applicant: ASM IP Holding B.V.

Inventor： Tae Hee Yoo ,  Yoon Ki Min ,  Yong Min Yoo

IPC: H01L21/311 ,  H01L27/1157 ,  H01L21/768 ,  H01L27/11524 ,  H01L21/02 ,  H01L27/11575 ,  H01L27/11548 ,  H01L27/11556 ,  H01L27/11582

Abstract: Provided is a substrate processing method that may prevent the non-uniformity of the thickness of landing pads deposited on each step in a vertical NAND device having a stepped structure. The substrate processing method includes stacking, a plurality of times, a stack structure including an insulating layer and a sacrificial layer and etching the stack structure to form a stepped structure having an upper surface, a lower surface, and a side surface connecting the upper surface and the lower surface. The method also includes forming a barrier layer on the stepped structure, forming a mask layer on the barrier layer and exposing at least a portion of the barrier layer by etching at least a portion of the mask layer with a first etching solution The method further includes etching the exposed barrier layer with a second etching solution and etching the mask layer with a third etching solution.

公开(公告)号：US20200303180A1

公开(公告)日：2020-09-24

申请号：US16897158

申请日：2020-06-09

Applicant: ASM IP HOLDING B.V.

Inventor： Young Hoon Kim ,  Yong Gyu Han ,  Dae Youn Kim ,  Tae Hee Yoo ,  Wan Gyu Lim ,  Jin Geun Yu

IPC: H01L21/02 ,  H01L21/033 ,  H01L21/311 ,  C23C16/50 ,  C23C16/455 ,  C23C16/34

Abstract: Provided is a method of depositing a thin film on a pattern structure of a semiconductor substrate, the method including (a) supplying a source gas; (b) supplying a reactive gas; and (c) supplying plasma, wherein the steps (a), (b), and (c) are sequentially repeated on the semiconductor substrate within a reaction space until a desired thickness is obtained, and a frequency of the plasma is a high frequency of 60 MHz or greater.

公开(公告)号：US20190081072A1

公开(公告)日：2019-03-14

申请号：US16188690

申请日：2018-11-13

Applicant: ASM IP Holding B.V.

Inventor： Seung Ju Chun ,  Yong Min Yoo ,  Jong Wan Choi ,  Young Jae Kim ,  Sun Ja Kim ,  Wan Gyu Lim ,  Yoon Ki Min ,  Hae Jin Lee ,  Tae Hee Yoo

IPC: H01L27/11582 ,  H01L23/532 ,  H01L27/115 ,  H01L23/522 ,  H01L21/768 ,  H01L21/311 ,  H01L27/11556 ,  H01L27/1157

Abstract: A method of processing a substrate by omitting a photolithographic process is disclosed. The method includes forming at least one layer on a stepped structure having an upper surface, a lower surface, and a side surface that connects the upper surface to the lower surface, selectively densifying portions of the at least one layer respectively on the upper surface and the lower surface via asymmetric plasma application, and performing an isotropic etching process on the at least one layer. During the isotropic etching process, the portion of the at least one layer formed on the upper surface is separated from the portion of the at least one layer formed on the lower surface.

公开(公告)号：US20190035810A1

公开(公告)日：2019-01-31

申请号：US16147047

申请日：2018-09-28

Applicant: ASM IP Holding B.V.

Inventor： Seung Ju Chun ,  Yong Min Yoo ,  Jong Wan Choi ,  Young Jae Kim ,  Sun Ja Kim ,  Wan Gyu Lim ,  Yoon Ki Min ,  Hae Jin Lee ,  Tae Hee Yoo

IPC: H01L27/11582 ,  H01L23/522 ,  H01L27/1157 ,  H01L27/11556 ,  H01L27/115 ,  H01L23/532 ,  H01L23/528 ,  H01L21/311 ,  H01L21/768 ,  H01L27/11575

Abstract: A method of processing a substrate by omitting a photolithographic process is disclosed. The method includes forming at least one layer on a stepped structure having an upper surface, a lower surface, and a side surface that connects the upper surface to the lower surface, selectively densifying portions of the at least one layer respectively on the upper surface and the lower surface via asymmetric plasma application, and performing an isotropic etching process on the at least one layer. During the isotropic etching process, the portion of the at least one layer formed on the upper surface is separated from the portion of the at least one layer formed on the lower surface.