Title:
MAGNETIC RANDOM ACCESS MEMORY, AND ITS MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2008/068967
Kind Code:
A1
Abstract:
Provided is an MRAM comprising a pin layer (60) and a magnetic recording layer (40)
connected through a tunnel barrier layer (50) with the pin layer (60). The magnetic
recording layer (40) includes a first free layer (10), a second free layer (30)
for contacting the tunnel barrier layer (50), and an intermediate layer (20)
interposed between the first free layer (10) and the second free layer (30). The
first free layer (10) includes a magnetization inverting region (13), a first
magnetization fixing region (11) and a second magnetization fixing region (12).
The magnetization inverting region (13) has an invertible magnetization and
overlaps the second free layer (30). The first magnetization fixing region (11)
is connected with a first boundary (B1) of the magnetization inverting region (13)
and has its magnetization direction fixed in a first direction. On the other hand,
the second magnetization fixing region (12) is connected with a secondary boundary
(B2) of the magnetization inverting region (13) and has its magnetization direction
fixed in a second direction. Both the first direction and the second direction
are directed toward the magnetization inverting region (13) or away from the
magnetization inverting region (13). The intermediate layer (20) is so formed
as to cover at least the magnetization inverting region (13). This magnetization
inverting region (13) and the second free layer (30) are magnetically coupled
through the intermediate layer (20).
Inventors:
HONJOU HIROAKI (JP)
SUZUKI TETSUHIRO (JP)
OHSHIMA NORIKAZU (JP)
SUZUKI TETSUHIRO (JP)
OHSHIMA NORIKAZU (JP)
Application Number:
PCT/JP2007/070553
Publication Date:
June 12, 2008
Filing Date:
October 22, 2007
Export Citation:
Assignee:
NEC CORP (JP)
HONJOU HIROAKI (JP)
SUZUKI TETSUHIRO (JP)
OHSHIMA NORIKAZU (JP)
HONJOU HIROAKI (JP)
SUZUKI TETSUHIRO (JP)
OHSHIMA NORIKAZU (JP)
International Classes:
H01L21/8246; H01L27/105; H01L29/82; H01L43/08
Foreign References:
| JP2006073930A | 2006-03-16 | |||
| JP2006093578A | 2006-04-06 | |||
| JP2007317895A | 2007-12-06 | |||
| JP2007258460A | 2007-10-04 |
Attorney, Agent or Firm:
KUDOH, Minoru (24-10 Minamiooi 6-chom, Shinagawa-ku Tokyo 13, JP)
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