Apparatus and method for testing semiconductor memory device
First Claim
1. A semiconductor memory device for performing a reliability test, comprising:
- a write driving block for generating a predetermined test voltage in response to a plurality of test control signals during a test mode and delivering a data inputted from an external circuit into the local I/O line pair during a data access operation during a normal mode;
a local I/O line pair coupled to the write driving block for receiving the predetermined test voltage from the write driving block during the test mode;
a cell array having a plurality of unit cells and a plurality of bit line pairs respectively having first and second bit lines and coupled to at least one unit cell for receiving the predetermined test voltage from each local I/O line pair to thereby check a result of the reliability test during the test mode; and
a test decision block enabled by a test mode enable signal for outputting the plurality of test control signals to the write driving block.
1 Assignment
0 Petitions
Accused Products
Abstract
A semiconductor memory device for performing a reliability test includes a write driving block for generating a predetermined test voltage in a test mode and delivering a data inputted from an external circuit into the local I/O line pair during a data access operation in a normal mode, a local I/O line pair coupled to the write driving block for receiving the predetermined test voltage in the test mode, and a cell array having a plurality of unit cells and a plurality of bit line pairs respectively having first and second bit lines and coupled to at least one unit cell for receiving the predetermined test voltage from each local I/O line pair to thereby check a result of the reliability test in the test mode.
9 Citations
27 Claims
-
1. A semiconductor memory device for performing a reliability test, comprising:
-
a write driving block for generating a predetermined test voltage in response to a plurality of test control signals during a test mode and delivering a data inputted from an external circuit into the local I/O line pair during a data access operation during a normal mode; a local I/O line pair coupled to the write driving block for receiving the predetermined test voltage from the write driving block during the test mode; a cell array having a plurality of unit cells and a plurality of bit line pairs respectively having first and second bit lines and coupled to at least one unit cell for receiving the predetermined test voltage from each local I/O line pair to thereby check a result of the reliability test during the test mode; and a test decision block enabled by a test mode enable signal for outputting the plurality of test control signals to the write driving block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A semiconductor memory device for performing a reliability test, comprising:
-
a test voltage generating block for generating a predetermined test voltage in response to a plurality of test control signals during a test mode; a local I/O line pair coupled to the test voltage generating block for receiving the predetermined test voltage from the test voltage generating block during the test mode; a cell array having a plurality of unit cells and a plurality of bit line pairs respectively having first and second bit lines and coupled to at least one unit cell for receiving the predetermined test voltage from each local I/O line pair to thereby check a result of the reliability test during the test mode; and a test decision block enabled by a test mode enable signal for outputting the plurality of test control signals to the write driving block. - View Dependent Claims (17, 18, 19, 20, 21)
-
-
22. A semiconductor memory device for performing a reliability test, comprising:
-
a local I/O line precharging block for receiving a plurality of test mode signals, generating a predetermined test voltage for performing a background test in response to the plurality of test mode signals during a test mode and generating a core voltage as a local I/O line precharge voltage during a normal mode; a local I/O line pair coupled to a test voltage generating block for receiving the predetermined test voltage from the test voltage generating block during the test mode; a cell array having a plurality of unit cells and a plurality of bit line pairs respectively having first and second bit lines and coupled to at least one unit cell for receiving the predetermined test voltage from each local I/O line pair to thereby check a result of the reliability test in the test mode; and a test decision block enabled by a test mode enable signal for outputting a plurality of test control signals to a write driver. - View Dependent Claims (23, 24, 25, 26, 27)
-
Specification