KR100867662B1 - 자기저항소자, 터널 장벽층 및 자기저항소자의 제조방법 - Google Patents
자기저항소자, 터널 장벽층 및 자기저항소자의 제조방법 Download PDFInfo
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Abstract
Description
Claims (30)
- 삭제
- 삭제
- 터널 장벽층과; 상기 터널 장벽층의 제1면측에 형성된 Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 또는 (001)결정면이 우선배향인 다결정층으로 이루어지는 제1 강자성체층과; 상기 터널 장벽층의 제2면측에 형성된 Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 또는 (001)결정면이 우선배향인 다결정층으로 이루어지는 제2 강자성체층; 을 포함하는 자기 터널접합구조를 갖추고, 상기 터널 장벽층이, 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx(0 <x <1)층에 의해 형성되어 있는 자기저항소자이며, 상기 터널 장벽층의 전도대 하단과, 상기 제1또는 제2 중의 적어도 일방의 강자성체층의 Fermi 준위와의 사이의 불연속값(터널 장벽의 높이)이 0.10 ~ 0.85 eV의 범위 내인 것을 특징으로 하는 자기저항소자.
- 터널 장벽층과; 상기 터널 장벽층의 제1면측에 형성된 BCC구조를 가지는 제1 강자성체층과; 상기 터널 장벽층의 제2면측에 형성된 BCC구조를 가지는 제2 강자성체층; 을 포함하는 자기 터널접합구조를 갖추고, 상기 터널 장벽층이 단결정MgOX(001) 혹은 (001)결정면이 우선배향인 다결정MgOX(0<X<1)층에 의해 형성되어 있는 자기저항소자이며, 상기 터널 장벽층의 전도대 하단과, 상기 제1또는 제2 중의 적어도 한편의 강자성체층의 Fermi 준위와의 사이의 불연속값(터널 장벽의 높이)이 0.10 ~ 0.85 eV의 범위 내인 것을 특징으로 하는 자기저항소자.
- 제3항에 있어서, 상기 불연속값은 0.2∼0.5eV의 범위 내인 것을 특징으로 하는 자기저항소자.
- 제4항에 있어서, 상기 불연속값은 0.2∼0.5 eV의 범위 내인 것을 특징으로 하는 자기저항소자.
- 1개의 트랜지스터와; 상기 트랜지스터의 부하로서 쓸 수 있는 제3항 내지 제6항 중 어느 한 항의 자기저항소자; 를 포함하여 구성된 기억소자.
- 기판을 준비하는 제1공정과;상기 기판 위에 제1Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 또는 (001)결정면이 우선배향인 다결정층을 퇴적하는 제2공정과;상기 제1Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 위로, 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx(0 <x <1)으로 이루어지는 터널 장벽층을 고진공상태에서 퇴적하는 제3공정과;상기 터널 장벽층 위로 제2Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 또는 (001)결정면이 우선배향인 다결정층을 형성하는 제4공정; 을 포함하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx(0 <x <1)으로 이루어진 기판을 준비하는 제1공정과;상기 기판 위로 제1Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 또는 (001)결정면이 우선배향인 다결정층을 퇴적하고, 이어서, 결정화를 위한 아닐링을 행하는 제2공정과;상기 제1Fe 또는 BCC구조를 가지는 Fe계 합금의 (001)층 위로 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx(0 <x <1)으로 이루어진 터널 장벽층을 고진공상태에서 퇴적하는 제3공정과;상기 터널 장벽층 위로 제2Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 또는 (001)결정면이 우선배향인 다결정층을 형성하는 제4공정; 을 포함하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 제8항 또는 제9항에 있어서, 상기 제1공정과 제2공정과의 사이에, 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx (0 <x <1)으로 이루어지는 시드층을 성장시키는 공정을 더 포함하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 제8항 또는 제9항에 있어서, 상기 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx(0 <x <1)으로 이루어진 터널 장벽층을 형성하는 공정 중에, MgOx의 x값을 조정하는 공정을 더 포함하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 기판을 준비하는 공정과;상기 기판 위로 제1Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 또는 (001)결정면이 우선배향인 다결정층을 퇴적하는 공정과;상기 제1Fe 또는 BCC구조를 가지는 Fe계 합금의 (001)층 위로 아모르포스(amorphous)MgOX층을 형성하고, 아닐링에 의해 상기 아모르포스(amorphous) MgOX층을 결정화해서 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx(0 <x <1)으로 이루어지는 터널 장벽층을 형성하는 공정과;상기 터널 장벽층 위로 제2Fe 또는 BCC구조를 가지는 Fe계 합금의 단결정(001)층 또는 (001)결정면이 우선배향인 다결정층을 형성하는 공정; 을 포함하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 제12항에 있어서, 상기 아모르포스(amorphous) MgOX층을 스퍼터링 (sputtering)법에 의해, MgOx의 x값이 조정된 타겟을 이용해서 퇴적하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 제12항에 있어서, 상기 아모르포스(amorphous) MgOX를 형성하는 공정 중에, MgOx의 x값을 조정하는 공정을 더 포함하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 터널 장벽층과; 상기 터널 장벽층의 제1면측에 형성된 아모르포스(amorphous) 자성합금으로 이루어진 제1 강자성체층과, 상기 터널 장벽층의 제2면측에 형성된 아모르포스(amorphous) 자성합금으로 이루어진 제2 강자성체층; 을 포함하는 자기 터널접합구조를 갖추고, 상기 터널 장벽층은, (001)결정면이 우선배향인 다결정MgOx (0 <x <1)층에 의해 형성되는 것을 특징으로 하는 자기저항소자.
- 제15항에 있어서, 상기 터널 장벽층의 전도대 하단과, 상기 제1 또는 제2 중의 적어도 일방의 강자성체층의 Fermi 준위와의 사이의 불연속값(터널 장벽의 높이)이 0.10 ~ 0.85 eV 범위 내인 것을 특징으로 하는 자기저항소자.
- 삭제
- 제16항에 있어서, 상기 불연속값이 0.2∼0.5eV의 범위 내인 것을 특징으로 하는 자기저항소자.
- 삭제
- 1개의 트랜지스터와; 상기 트랜지스터의 부하로서 쓸 수 있는 제15항, 제16항 또는 제18항 중 어느 한 항에 기재된 자기저항소자; 를 포함하는 기억소자.
- 기판을 준비하는 공정과;상기 기판 위로 아모르포스(amorphous) 자성합금으로 이루어진 제1 강자성체층을 퇴적하는 공정과;상기 제1 강자성체층 위로 아모르포스(amorphous)MgO층을 형성하고, 아닐링에 의해 상기 아모르포스(amorphous)MgO층을 결정화해서 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx (0 <x <1)으로 이루어지는 터널 장벽층을 형성하는 공정과;상기 터널 장벽층 위로 아모르포스(amorphous) 자성합금으로 이루어진 제2 강자성체층을 퇴적하는 공정; 을 포함하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 제21항에 있어서, 상기 단결정MgOx(001) 혹은 (001)결정면이 우선배향인 다결정MgOx (0 <x <1)으로 이루어지는 터널 장벽층을 형성하는 공정은, 스퍼터링법에 의해 MgOx의 x값이 조정된 타겟을 이용해서 퇴적하는 것을 포함하는 것을 특징으로 하는 자기저항소자의 제조 방법.
- 터널 장벽층과; 그 터널 장벽층의 제1면 측에 형성된 제1강자성체층과; 상기 터널 장벽층의 제2면 측에 형성된 제2강자성체층; 을 가지는 자기터널접합구조를 갖추고,상기 터널 장벽층이, (001)결정면이 우선배향된 다결정 MgOX (0<X<1)층에 위에 형성되어 있고,상기 터널 장벽층의 전도대 하단과, 상기 제1 또는 제2 중 적어도 하나의 강자성체층의 페르미 준위와의 사이의 불연속 값(터널장벽의 높이)이 0.10 ~ 0.85 eV 범위 내인 것을 특징으로 하는 자기저항소자.
- 제23항에 있어서, 상기 불연속 값이 0.2 ~ 0.5 eV 범위 내인 것을 특징으로 하는 자기저항소자.
- 삭제
- 아모르포스 자성합금으로 이루어진 강자성체층 위에 형성된, (001)결정면이 우선배향된 다결정 MgOX (0<X<1)로 이루어진 터널 장벽층이며,상기 터널 장벽층의 전도대 하단과, 상기 강자성체층의 페르미 준위와의 불연속 값(터널 장벽층의 높이)이 0.10 ~ 0.85 eV 범위 내인 것을 특징으로 하는 터널 장벽층.
- 제26항에 있어서, 상기 불연속 값이 0.2 ~ 0.5 eV 범위 내인 것을 특징으로 하는 터널 장벽층.
- 삭제
- (001)결정면이 우선배향인 다결정 MgOX (0<X<1)로 이루어진 터널 장벽층으로, 터널 장벽의 높이가 0.2 ~ 0.5 eV 범위 내인 것을 특징으로 하는 터널 장벽층.
- 삭제
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