Test system and write wafer
First Claim
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1. A test system for testing a plurality of semiconductor chips formed on a semiconductor wafer, comprising:
- a test wafer on which a plurality of test circuits corresponding to the plurality of semiconductor chips are formed, each test circuit testing a corresponding one of the plurality of semiconductor chips based on test data provided to the test circuit;
a write wafer including a plurality of write circuits, each write circuit writing the test data to a corresponding one of the plurality of test circuits; and
a control apparatus operable to supply the test data to each write circuit;
wherein each of the plurality of test circuits includes a nonvolatile and rewritable pattern memory for storing the test data.
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Abstract
A test system for testing a plurality of semiconductor chips formed on a semiconductor wafer includes: a test wafer on which a plurality of test circuits corresponding to the plurality of semiconductor chips are formed, each test circuit testing a corresponding one of the plurality of semiconductor chips based on test data provided to the test circuit; where each of the plurality of test circuits includes a nonvolatile and rewritable pattern memory for storing the test data such as pattern data and sequence data, and the test system writes the same test data to all the plurality of test circuits in parallel.
21 Citations
10 Claims
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1. A test system for testing a plurality of semiconductor chips formed on a semiconductor wafer, comprising:
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a test wafer on which a plurality of test circuits corresponding to the plurality of semiconductor chips are formed, each test circuit testing a corresponding one of the plurality of semiconductor chips based on test data provided to the test circuit; a write wafer including a plurality of write circuits, each write circuit writing the test data to a corresponding one of the plurality of test circuits; and a control apparatus operable to supply the test data to each write circuit; wherein each of the plurality of test circuits includes a nonvolatile and rewritable pattern memory for storing the test data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for writing substantially similar test data to each of a plurality of test circuits formed on a test wafer, each test circuit testing a corresponding semiconductor chip of a plurality of semiconductor chips formed on a semiconductor wafer based on the test data written to the test circuit, the apparatus comprising:
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a write wafer including a plurality of write circuits corresponding to the plurality of test circuits, each write circuit writing the test data to a corresponding one of the plurality of test circuits, the test data allowing each test circuit to generate a test signal for testing a corresponding semiconductor chip of the plurality of semiconductor chips; and a common storage section in communication with the plurality of write circuits, the common storage section storing the test data, and supplying the test data to each of the plurality of write circuits.
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10. A method comprising:
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receiving, at each of a plurality of write circuits included in a write wafer, test data from a control apparatus, the test data allowing each of a plurality of test circuits included in a test wafer to generate a test signal; writing the test data from each of the plurality of write circuits to a corresponding test circuit of the plurality of test circuits; and testing a corresponding semiconductor chip of a plurality of semiconductor chips included in a semiconductor wafer using the test signal.
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Specification