Static information storage and retrieval – Addressing – Particular decoder or driver circuit
Reexamination Certificate
2007-07-24
2007-07-24
Elms, Richard T. (Department: 2824)
Static information storage and retrieval
Addressing
Particular decoder or driver circuit
C365S230010
Reexamination Certificate
active
11245455
ABSTRACT:
A semiconductor memory and a method for operating the latter in order are provided, at least in testwise fashion, to deactivate a word line segment (12) of a segmented word line not via a first line (21) otherwise used for deactivation, but rather via a second line (22) via that the word line segment (12) is otherwise activated. The second line (22) can optionally be biased with a second potential (Vpp) provided for activation or with a third potential (Vgnd). If the third potential (Vgnd) is used for at least temporarily deactivating the word line segment (12), the word line segment can be driven via a switching element (17), which couples the word line segment to the second line (22), without the complementary switching element (16) of the driver segment (20) having to be used for deactivation. It can thereby be ascertained which of two switching elements (16, 17) of the driver segment is defective and whether or not the semiconductor memory will function in a manner free of errors after permanent replacement of the word line on account of a floating potential of the tested word line segment (12).
REFERENCES:
patent: 5648933 (1997-07-01), Slemmer
patent: 6058050 (2000-05-01), Wu et al.
patent: 6236617 (2001-05-01), Hsu et al.
patent: 600 06 162 (2004-07-01), None
Benzinger Herbert
Gruber Arndt
Proell Manfred
Schroeder Stephan
Elms Richard T.
Infineon - Technologies AG
Nguyen N
Slater & Matsil L.L.P.
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