KR20210114016A - 프로세서 및 낸드 플래시 메모리를 갖는 접합된 반도체 소자 및 이를 형성하는 방법 - Google Patents
프로세서 및 낸드 플래시 메모리를 갖는 접합된 반도체 소자 및 이를 형성하는 방법 Download PDFInfo
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Abstract
Description
도 1a는 일부 실시예에 따른 예시적인 반도체 소자의 단면의 개략도를 나타낸다.
도 1b는 일부 실시예에 따른 다른 예시적인 반도체 소자의 단면의 개략도를 나타낸다.
도 2a는 일부 실시예에 따른 프로세서 및 SRAM을 갖는 예시적인 반도체 구조체의 개략 평면도를 나타낸다.
도 2b는 일부 실시예에 따른 NAND 메모리 및 주변 회로를 갖는 예시적인 반도체 구조체의 개략 평면도를 나타낸다.
도 3a는 일부 실시예에 따른 프로세서, SRAM, 및 주변 회로를 갖는 예시적인 반도체 구조체의 개략적인 평면도를 나타낸다.
도 3b는 일부 실시예에 따른 NAND 메모리를 갖는 예시적인 반도체 구조체의 개략적인 평면도를 나타낸다.
도 4a는 일부 실시예에 따른 예시적인 반도체 소자의 단면을 나타낸다.
도 4b는 일부 실시예에 따른 다른 예시적인 반도체 소자의 단면을 나타낸다.
도 5a는 일부 실시예에 따른 또 다른 예시적인 반도체 소자의 단면을 나타낸다.
도 5b는 일부 실시예에 따른 또 다른 예시적인 반도체 소자의 단면을 나타낸다.
도 6a 및 도 6b는 일부 실시예에 따른 프로세서, SRAM, 및 주변 회로를 갖는 예시적인 반도체 구조체를 형성하기 위한 제조 공정을 나타낸다.
도 7a 및 도 7b는 일부 실시예에 따른 3D NAND 메모리 스트링을 갖는 예시적인 반도체 구조체를 형성하기 위한 제조 공정을 나타낸다.
도 7c 및 도 7d는 일부 실시예에 따른 2D NAND 메모리 셀을 갖는 예시적인 반도체 구조체를 형성하기 위한 제조 공정을 나타낸다.
도 8a 및 도 8b는 일부 실시예에 따른 예시적인 반도체 소자를 형성하기 위한 제조 공정을 나타낸한다.
도 8c 및 도 8d는 일부 실시예에 따른 다른 예시적인 반도체 소자를 형성하기 위한 제조 공정을 나타낸다.
도 9a∼도 9c는 일부 실시예에 따른 예시적인 반도체 구조체를 접합 및 다이싱하기 위한 제조 공정을 나타낸다.
도 10a∼도 10c는 일부 실시예에 따른 예시적인 반도체 구조체를 다이싱 및 접합하기 위한 제조 공정을 나타낸다.
도 11a는 일부 실시예에 따른 NAND 메모리 및 주변 회로를 갖는 예시적인 반도체 구조의 단면을 나타낸다.
도 11b는 일부 실시예에 따른 NAND 메모리 및 주변 회로를 갖는 다른 예시적인 반도체 구조체의 단면을 나타낸다.
도 12a는 일부 실시예에 따른 NAND 메모리를 갖는 예시적인 반도체 구조체의 블록도를 도시한다.
도 12b는 일부 실시예에 따른 NAND 메모리 및 주변 회로를 갖는 예시적인 반도체 구조체의 블록도를 도시한다.
도 12c는 일부 실시예에 따른 NAND 메모리 및 주변 회로를 갖는 다른 예시적인 반도체 구조체의 블록도를 도시한다.
도 13은 일부 실시예에 따른 반도체 소자를 형성하기 위한 예시적인 방법의 흐름도이다.
도 14는 일부 실시예에 따른 반도체 소자를 형성하기 위한 다른 예시적인 방법의 흐름도이다.
첨부된 도면을 참조하여 본 발명의 실시예를 설명한다.
Claims (48)
- 반도체 소자로서,
프로세서, 정적 랜덤 액세스 메모리(static random-access memory, SRAM) 셀의 어레이, 및 복수의 제1 접합 콘택트(bonding contact)를 포함하는 제1 접합 층을 포함하는 제1 반도체 구조체 - 상기 제1 접합 층은 복수의 제1 접합 콘택트(bonding contact)를 포함함 -;
NAND 메모리 셀의 어레이, 및 제2 접합 층을 포함하는 제2 반도체 구조체 - 상기 제2 접합 층은 복수의 제2 접합 콘택트를 포함함 -; 및
상기 제1 접합 층과 상기 제2 접합 층 사이의 접합 계면(bonding interface) - 상기 제1 접합 콘택트는 상기 접합 계면에서 상기 제2 접합 콘택트와 접촉함 -
을 포함하는 반도체 소자. - 제1항에 있어서,
상기 제1 반도체 구조체는,
기판;
상기 기판 상의 상기 프로세서;
상기 기판 상에 그리고 상기 프로세서 외부에 있는 상기 SRAM 셀의 어레이; 및
상기 프로세서 및 상기 SRAM 셀의 어레이 위의 상기 제1 접합 층을 포함하는, 반도체 소자. - 제2항에 있어서,
상기 제2 반도체 구조체는,
상기 제1 접합 층 위의 상기 제2 접합 층;
상기 제2 접합 층 위의 메모리 스택;
상기 메모리 스택을 통해 수직으로 연장되는 3차원(three-dimensional, 3D) NAND 메모리 스트링의 어레이; 및
상기 3D NAND 메모리 스트링의 어레이와 접촉하고 상기 3D NAND 메모리 스트링 위에 있는 반도체 층을 포함하는, 반도체 소자. - 제2항에 있어서,
상기 제2 반도체 구조체는,
상기 제1 접합 층 위의 상기 제2 접합 층;
상기 제2 접합 층 위의 2차원(two-dimensional, 2D) NAND 메모리 셀의 어레이; 및
상기 2D NAND 메모리 셀의 어레이와 접촉하고 상기 2D NAND 메모리 셀 위에 있는 반도체 층을 포함하는, 반도체 소자. - 제3항 또는 제4항에 있어서,
상기 반도체 층 위에 패드 아웃 상호연결 층(pad-out interconnect layer)을 더 포함하는 반도체 소자. - 제3항 내지 제5항 중 어느 한 항에 있어서,
상기 반도체 층은 폴리실리콘을 함유하는, 반도체 소자. - 제3항 내지 제5항 중 어느 한 항에 있어서,
상기 반도체 층은 단결정 실리콘을 함유하는, 반도체 소자. - 제1항에 있어서,
상기 제2 반도체 구조체는,
기판;
상기 기판 위의 메모리 스택;
상기 메모리 스택을 통해 수직으로 연장되는 3D NAND 메모리 스트링의 어레이; 및
상기 메모리 스택 및 상기 3D NAND 메모리 스트링의 어레이 위의 상기 제2 접합 층을 포함하는, 반도체 소자. - 제1항에 있어서,
상기 제2 반도체 구조체는,
기판;
상기 기판 상의 2D NAND 메모리 셀의 어레이; 및
상기 2D NAND 메모리 셀의 어레이 위의 상기 제2 접합 층을 포함하는, 반도체 소자. - 제8항 또는 제9항에 있어서,
상기 제1 반도체 구조체는,
상기 제2 접합 층 위의 상기 제1 접합 층;
상기 제1 접합 층 위의 상기 프로세서;
상기 제1 접합 층 위 및 상기 프로세서 외부에 있는 상기 SRAM 셀의 어레이; 및
상기 프로세서와 상기 SRAM 셀의 어레이와 접촉하고 상기 프로세서와 상기 SRAM 셀 위에 있는 반도체 층을 포함하는, 반도체 소자. - 제10항에 있어서,
상기 반도체 층 위에 패드 아웃 상호연결 층을 더 포함하는, 반도체 소자. - 제10항 또는 제11항에 있어서,
상기 반도체 층은 단결정 실리콘을 함유하는, 반도체 소자. - 제1항 내지 제12항 중 어느 한 항에 있어서,
상기 제1 반도체 구조체는 상기 NAND 메모리 셀의 어레이의 주변 회로를 더 포함하는, 반도체 소자. - 제1항 내지 제12항 중 어느 한 항에 있어서,
상기 제2 반도체 구조체는 상기 NAND 메모리 셀의 어레이의 주변 회로를 더 포함하는, 반도체 소자. - 제14항에 있어서,
상기 주변 회로는 상기 NAND 메모리 셀의 어레이 위에 또는 아래에 있는, 반도체 소자. - 제14항에 있어서,
상기 주변 회로는 상기 NAND 메모리 셀의 어레이의 외부에 있는, 반도체 소자. - 제1항 내지 제16항 중 어느 한 항에 있어서,
상기 제1 반도체 구조체는 상기 제1 접합 층과 상기 프로세서 사이에 수직으로 제1 상호연결 층을 포함하고, 상기 제2 반도체 구조체는 상기 제2 접합 층과 상기 NAND 메모리 셀의 어레이 사이에 수직으로 제2 상호연결 층을 포함하는, 반도체 소자. - 제17항에 있어서,
상기 프로세서는 상기 제1 상호연결 층과 상기 제2 상호연결 층 및 상기 제1 접합 콘택트와 상기 제2 접합 콘택트를 통해 상기 NAND 메모리 셀의 어레이에 전기적으로 연결되는, 반도체 소자. - 제17항 또는 제18항에 있어서,
상기 SRAM 셀의 어레이는 상기 제1 상호연결 층과 상기 제2 상호연결 층 및 상기 제1 접합 콘택트와 상기 제2 접합 콘택트를 통해 상기 NAND 메모리 셀의 어레이에 전기적으로 연결되는, 반도체 소자. - 제1항 내지 제19항 중 어느 한 항에 있어서,
상기 SRAM 셀의 어레이는 상기 제1 반도체 구조체에서 복수의 개별 영역에 분포되는, 반도체 소자. - 반도체 소자를 형성하는 방법으로서,
제1 웨이퍼 상에 복수의 제1 반도체 구조체를 형성하는 단계 - 상기 복수의 제1 반도체 구조체 중 적어도 하나는 프로세서, 정적 랜덤 액세스 메모리(SRAM) 셀의 어레이, 및 제1 접합 층을 포함하고, 상기 제1 접합 층은 복수의 제1 접합 콘택트를 포함함 -;
제2 웨이퍼 상에 복수의 제2 반도체 구조체를 형성하는 단계 - 상기 복수의 제2 반도체 구조체 중 적어도 하나는 NAND 메모리 셀의 어레이, 및 제2 접합 층을 포함하고, 상기 제2 접합 층은 복수의 제2 접합 콘택트를 포함함 -;
상기 복수의 제1 반도체 구조체 중 적어도 하나가 상기 복수의 제2 반도체 구조체 중 적어도 하나에 접합되도록, 상기 제1 웨이퍼와 상기 제2 웨이퍼를 면대면 방식으로 접합하는 단계 - 상기 제1 반도체 구조체의 제1 접합 콘택트는 접합 계면에서 상기 제2 반도체 구조체의 제2 접합 콘택트와 접촉함 -; 및
접합된 제1 웨이퍼와 제2 웨이퍼를 복수의 다이로 다이싱하는 단계 - 상기 복수의 다이 중 적어도 하나는 접합된 제1 반도체 구조체 및 제2 반도체 구조체를 포함함 -
를 포함하는 방법. - 제21항에 있어서,
상기 복수의 제1 반도체 구조체를 형성하는 단계는,
상기 제1 웨이퍼 상에 상기 프로세서 및 상기 SRAM 셀의 어레이를 형성하는 단계;
상기 프로세서 및 상기 SRAM 셀의 어레이 위에 제1 상호연결 층을 형성하는 단계; 및
상기 제1 상호연결 층 위에 상기 제1 접합 층을 형성하는 단계를 포함하는, 방법. - 제22항에 있어서,
상기 프로세서 및 상기 SRAM 셀의 어레이를 형성하는 단계는, 상기 제1 웨이퍼 상에 복수의 트랜지스터를 형성하는 단계를 포함하는, 방법. - 제22항 또는 제23항에 있어서,
상기 복수의 제1 반도체 구조체를 형성하는 단계는, 상기 제1 웨이퍼 상에 상기 NAND 메모리 셀의 어레이의 주변 회로를 형성하는 단계를 더 포함하는, 방법. - 제21항 내지 제24항 중 어느 한 항에 있어서,
상기 복수의 제2 반도체 구조체를 형성하는 단계는,
상기 제2 웨이퍼 위에 메모리 스택을 형성하는 단계;
상기 메모리 스택을 통해 수직으로 연장되는 3차원(3D) NAND 메모리 스트링의 어레이를 형성하는 단계;
상기 3D NAND 메모리 스트링의 어레이 위에 제2 상호연결 층을 형성하는 단계; 및
상기 제2 상호연결 층 위에 상기 제2 접합 층을 형성하는 단계를 포함하는, 방법. - 제21항 내지 제24항 중 어느 한 항에 있어서,
상기 복수의 제2 반도체 구조체를 형성하는 단계는,
상기 제2 웨이퍼 상에 2차원(2D) NAND 메모리 셀의 어레이를 형성하는 단계;
상기 2D NAND 메모리 셀의 어레이 위에 제2 상호연결 층을 형성하는 단계; 및
상기 제2 상호연결 층 위에 상기 제2 접합 층을 형성하는 단계를 포함하는, 방법. - 제25항 또는 제26항에 있어서,
상기 복수의 제2 반도체 구조체를 형성하는 단계는, 상기 제2 웨이퍼 상에 상기 NAND 메모리 셀의 어레이의 주변 회로를 형성하는 단계를 더 포함하는, 방법. - 제27항에 있어서,
상기 주변 회로는 상기 NAND 메모리 셀의 어레이 위에 또는 아래에 형성되는, 방법. - 제27항에 있어서,
상기 주변 회로는 상기 NAND 메모리 셀의 어레이 외부에 형성되는, 방법. - 제21항 내재 제29항 중 어느 한 항에 있어서,
상기 제2 반도체 구조체는 상기 접합하는 단계 후에 상기 제1 반도체 구조체 위에 있는, 방법. - 제30항에 있어서,
상기 접합하는 단계 후이고 상기 다이싱하는 단계 전에,
상기 제2 웨이퍼를 박형화하여 반도체 층을 형성하는 단계; 및
상기 반도체 층 위에 패드 아웃 상호연결 층을 형성하는 단계를 더 포함하는 방법. - 제21항 내지 제29항 중 어느 한 항에 있어서,
상기 제1 반도체 구조체는 상기 접합하는 단계 후에 상기 제2 반도체 구조체 위에 있는, 방법. - 제32항에 있어서,
상기 접합하는 단계 후이고 상기 다이싱하는 단계 전에,
상기 제1 웨이퍼를 박형화하여 반도체 층을 형성하는 단계; 및
상기 반도체 층 위에 패드 아웃 상호연결 층을 형성하는 단계를 더 포함하는 방법. - 제21항 내지 제33항 중 어느 한 항에 있어서,
상기 접합은 하이브리드 접합(hybrid bonding)을 포함하는, 방법. - 반도체 소자를 형성하는 방법으로서,
제1 웨이퍼 상에 복수의 제1 반도체 구조체를 형성하는 단계 - 상기 복수의 제1 반도체 구조체 중 적어도 하나는 프로세서, 정적 랜덤 액세스 메모리(SRAM) 셀의 어레이, 및 제1 접합 층을 포함하고, 상기 제1 접합 층은 복수의 제1 접합 콘택트를 포함함 -;
복수의 제1 다이 중 적어도 하나가 상기 복수의 제1 반도체 구조체 중 적어도 하나를 포함하도록, 상기 제1 웨이퍼를 상기 복수의 제1 다이로 다이싱하는 단계;
제2 웨이퍼 상에 복수의 제2 반도체 구조체를 형성하는 단계 - 상기 복수의 제2 반도체 구조체 중 적어도 하나는 NAND 메모리 셀의 어레이, 및 제2 접합 층을 포함하고, 상기 제2 접합 층은 복수의 제2 접합 콘택트를 포함함 -;
복수의 제2 다이 중 적어도 하나가 상기 복수의 제2 반도체 구조체 중 적어도 하나를 포함하도록, 상기 제2 웨이퍼를 상기 복수의 제2 다이로 다이싱하는 단계; 및
상기 제1 반도체 구조체가 상기 제2 반도체 구조체에 접합되도록, 상기 제1 다이와 상기 제2 다이를 면대면 방식으로 접합하는 단계 - 상기 제1 반도체 구조체의 제1 접합 콘택트는 접합 계면에서 상기 제2 반도체 구조체의 제2 접합 콘택트와 접촉함 -
를 포함하는 방법. - 제35항에 있어서,
상기 복수의 제1 반도체 구조체를 형성하는 단계는,
상기 제1 웨이퍼 상에 상기 프로세서 및 상기 SRAM 셀의 어레이를 형성하는 단계;
상기 프로세서 및 상기 SRAM 셀의 어레이 위에 제1 상호연결 층을 형성하는 단계; 및
상기 제1 상호연결 층 위에 상기 제1 접합 층을 형성하는 단계를 포함하는, 방법. - 제36항에 있어서,
상기 프로세서 및 상기 SRAM 셀의 어레이를 형성하는 단계는, 상기 제1 웨이퍼 상에 복수의 트랜지스터를 형성하는 단계를 포함하는, 방법. - 제36항 또는 제37항에 있어서,
상기 복수의 제1 반도체 구조체를 형성하는 단계는, 상기 제1 웨이퍼 상에 상기 NAND 메모리 셀의 어레이의 주변 회로를 형성하는 단계를 더 포함하는, 방법. - 제35항 내지 제38항 중 어느 한 항에 있어서,
상기 복수의 제2 반도체 구조체를 형성하는 단계는,
상기 제2 웨이퍼 위에 메모리 스택을 형성하는 단계;
상기 메모리 스택을 통해 수직으로 연장되는 3차원(3D) NAND 메모리 스트링의 어레이를 형성하는 단계;
상기 3D NAND 메모리 스트링의 어레이 위에 제2 상호연결 층을 형성하는 단계; 및
상기 제2 상호연결 층 위에 상기 제2 접합 층을 형성하는 단계를 포함하는, 방법. - 제35항 내지 제38항 중 어느 한 항에 있어서,
상기 복수의 제2 반도체 구조체를 형성하는 단계는,
상기 제2 웨이퍼 상에 2차원(2D) NAND 메모리 셀의 어레이를 형성하는 단계;
상기 2D NAND 메모리 셀의 어레이 위에 제2 상호연결 층을 형성하는 단계; 및
상기 제2 상호연결 층 위에 상기 제2 접합 층을 형성하는 단계를 포함하는, 방법. - 제39항 또는 제40항에 있어서,
상기 복수의 제2 반도체 구조체를 형성하는 단계는, 상기 제2 웨이퍼 상에 상기 NAND 메모리 셀의 어레이의 주변 회로를 형성하는 단계를 더 포함하는, 방법. - 제41항에 있어서,
상기 주변 회로는 상기 NAND 메모리 셀의 어레이 위에 또는 아래에 형성되는, 방법. - 제41항에 있어서,
상기 주변 회로는 상기 NAND 메모리 셀의 어레이 외부에 형성되는, 방법. - 제35항 내재 제43항 중 어느 한 항에 있어서,
상기 제2 반도체 구조체는 상기 접합하는 단계 후에 상기 제1 반도체 구조체 위에 있는, 방법. - 제44항에 있어서,
상기 제2 웨이퍼를 다이싱하는 단계 전에 상기 제2 웨이퍼를 박형화하여 반도체 층을 형성하는 단계; 및
상기 반도체 층 위에 패드 아웃 상호연결 층을 형성하는 단계를 더 포함하는 방법. - 제35항 내지 제43항 중 어느 한 항에 있어서,
상기 제1 반도체 구조체는 상기 접합하는 단계 후에 상기 제2 반도체 구조체 위에 있는, 방법. - 제46항에 있어서,
상기 제1 웨이퍼를 다이싱하는 단계 전에, 상기 제1 웨이퍼를 박형화하여 반도체 층을 형성하는 단계; 및
상기 반도체 층 위에 패드 아웃 상호연결 층을 형성하는 단계를 더 포함하는 방법. - 제35항 내지 제47항 중 어느 한 항에 있어서,
상기 접합은 하이브리드 접합을 포함하는, 방법.
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