Memory device and method for repairing a semiconductor memory

Details Memory device and method for repairing a semiconductor memory Memory device and method for repairing a semiconductor memory

2011-01-11

2011-01-11

Iqbal, Nadeem (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

Reexamination Certificate

active

07870435

ABSTRACT:
A block repair device is used in a Dynamic Random Access Memory (DRAM) having a primary array with a defective cell and a redundant array with a redundant row. The block repair device stores a block repair configuration that determines the dimensions (e.g., the number of rows and columns spanned) of a repair block. Routing circuitry is configured by the stored block repair configuration to output some row and column address bits from received row and column addresses in a selected ratio. Comparison circuitry compares the row and column address bits output by the routing circuitry with the address of the defective cell that defines the repair block. When a match occurs, the comparison circuitry implements a block repair by activating the redundant row and by causing data to be written to or read from the activated redundant row instead of the primary array.

REFERENCES:
patent: 4459685 (1984-07-01), Sud et al.
patent: 4473895 (1984-09-01), Tatematsu
patent: 4601019 (1986-07-01), Shah et al.
patent: 5179536 (1993-01-01), Kasa et al.
patent: 5337277 (1994-08-01), Jang
patent: 5381370 (1995-01-01), Lacey et al.
patent: 5422850 (1995-06-01), Sukegawa et al.
patent: 5452251 (1995-09-01), Akaogi et al.
patent: 5513144 (1996-04-01), O'Toole
patent: 5523975 (1996-06-01), Reddy
patent: 5528539 (1996-06-01), Ong et al.
patent: 5548225 (1996-08-01), Rountree et al.
patent: 5576633 (1996-11-01), Rountree et al.
patent: 5594693 (1997-01-01), Rouy et al.
patent: 5604702 (1997-02-01), Tailliet
patent: 5648934 (1997-07-01), O'Toole
patent: 5684740 (1997-11-01), Hirata
patent: 5703817 (1997-12-01), Shiratake et al.
patent: 5706292 (1998-01-01), Merritt
patent: 5729551 (1998-03-01), Park et al.
patent: 5751647 (1998-05-01), O'Toole
patent: 5835425 (1998-11-01), Berger
patent: 5867504 (1999-02-01), Pascucci
patent: 5914907 (1999-06-01), Kobayashi et al.
patent: 6006313 (1999-12-01), Fukumoto
patent: 6018811 (2000-01-01), Merritt
patent: 6038682 (2000-03-01), Norman
patent: 6044029 (2000-03-01), Shore
patent: 6122213 (2000-09-01), Shore
patent: 6154851 (2000-11-01), Sher et al.
patent: 6199177 (2001-03-01), Blodgett
patent: 6282670 (2001-08-01), Islam et al.
patent: 6571352 (2003-05-01), Blodgett
patent: 6892318 (2005-05-01), Blodgett
patent: 6910152 (2005-06-01), Blodgett
patent: 7467334 (2008-12-01), Blodgett
patent: 2001/0016893 (2001-08-01), Merritt
patent: 2001/0044916 (2001-11-01), Blodgett
patent: 2002/0019961 (2002-02-01), Blodgett
patent: 2003/0154422 (2003-08-01), Blodgett
patent: 2004/0010737 (2004-01-01), Merritt

Affiliated with

Also associated with

Rating

Memory device and method for repairing a semiconductor memory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Memory device and method for repairing a semiconductor memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory device and method for repairing a semiconductor memory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2642820