Static information storage and retrieval – Associative memories – Ferroelectric cell
Reexamination Certificate
2006-03-07
2006-03-07
Le, Vu A. (Department: 2824)
Static information storage and retrieval
Associative memories
Ferroelectric cell
C365S154000
Reexamination Certificate
active
07009862
ABSTRACT:
Data lines (D0, D1) are shared by a first storage portion (MA) and a second storage portion (MB), and furthermore, a first transistor (MC0) coupled to a first comparison data portion (CD0) and a second transistor (MCA) coupled to the storage node of a first storage portion are connected in series to form a first comparing circuit (11), and a third transistor (MC1) coupled to a second comparison data line (CD1) and a fourth transistor (MCB) coupled to the storage node of the second storage portion are connected in series to form a second comparing circuit (12). Consequently, it is possible to enhance a symmetry in the layout of a diffusion layer and a wiring layer and to achieve the easiness of a layout in which a memory cell is line symmetrical with respect to a center line passing through a center thereof. Thus, a manufacturing process condition can easily be optimized and a variation in a manufacturing process can be reduced so that the microfabrication of the memory cell can be achieved.
REFERENCES:
patent: 4646271 (1987-02-01), Uchiyama et al.
patent: 4780845 (1988-10-01), Threewitt
patent: 5490102 (1996-02-01), Jubran
patent: 5495382 (1996-02-01), Albon
patent: 6154384 (2000-11-01), Nataraj et al.
patent: 6584003 (2003-06-01), Kim et al.
patent: 2004/0012040 (2004-01-01), Osada et al.
patent: 2004/0114411 (2004-06-01), Node et al.
patent: 2001-28401 (2001-01-01), None
Aihara Yoichiro
Higeta Keiichi
Iwahashi Satoshi
Nakahara Shigeru
Hitachi , Ltd.
Le Vu A.
Miles & Stockbridge P.C.
LandOfFree
Semiconductor device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3614270