Static information storage and retrieval – Systems using particular element – Magnetoresistive
Reexamination Certificate
2006-06-27
2006-06-27
Phung, Anh (Department: 2824)
Static information storage and retrieval
Systems using particular element
Magnetoresistive
C365S243500, C365S032000
Reexamination Certificate
active
07068530
ABSTRACT:
One block SB serving as a fundamental unit constituting a data reading circuit is constituted by four memory cells MS1to MS4connected electrically in series, four FETs S1to S4connected in parallel with the memory cells MS1to MS4in one-to-one correspondence, and an FET S0connected to one of series connection ends of the memory cells MS1to MS4. Each memory cell MS1-MS4is formed out of a TMR element having two TMR element portions connected electrically in series. The two TMR element portions are connected in series to thereby form a series connection body. A sensing current flows in only through one end of the series connection body of the two TMR element portions, passes through the TMR element portions in turn, and then flows out only through the other end of the series connection body.Further, the TMR element11has two TMR element portions11A and11B. The TMR element portions11A and11B are disposed in a direction parallel with their laminated surfaces with respect to each other. The TMR element portions11A and11B are electrically connected in series to thereby form a series connection body. A sensing current for detecting a change in magnetoresistance flows in only through one end of the series connection body of the two TMR element portions11A and11B, passes through the TMR element portions11A and11B in turn, and then flows out only through the other end of the series connection body. The sensing current flows through an effective area effective in changing the magnetoresistance in each TMR element portion11A,11B, and in a direction substantially perpendicular to the laminated surface.
REFERENCES:
patent: 6005800 (1999-12-01), Koch et al.
patent: 6215301 (2001-04-01), Lenssen
patent: 2002/0097598 (2002-07-01), Hoenigschmid
patent: 2002-249565 (2002-09-01), None
Nguyen Dang T.
Phung Anh
TDK Corporation
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