Test method for asynchronously repairing and adjusting silicon wafer with anti-interference

Abstract

The invention provides a test method of an anti-interference asynchronous trimming wafer, wherein, a probe card is used for testing and trimming a chip on the wafer. Two probes which are a test probe and a fuse probe are arranged on the probe card. The method includes the following steps: step one, the initial value of the chip before a fuse is trimmed is tested; step two, the fuse is trimmed; step three, the final trimming result after the fuse is trimmed is tested. In the three steps, only one probe is adopted to be in contact with the chip for each time. The chip to be tested is only in contact with the test probe and is not in contact with the fuse probe in step one and step three when the relevant parameter values of the chip to be tested are measured, thereby avoiding the interference of the fuse probe in the testing of the chip so as to greatly improve the measuring accuracy of the initial value.

Description

technical field [0001] The invention relates to an anti-interference asynchronous trimming wafer testing method, and in particular to an anti-interference asynchronous trimming wafer testing method in which fuse probes and test probes are respectively arranged on different chips. Background technique [0002] The development of electronic chips includes: chip design, wafer manufacturing, wafer testing, dicing and packaging, packaging and testing, etc. Wafer testing is a test environment built by the test machine and probe card, and the chips on the wafer are tested in this environment to ensure that the electrical characteristics and functions of each chip meet the design specifications and specifications. Chips that fail the test will be marked as bad products and will be screened out in the subsequent dicing and packaging stage. Only chips that pass the test are packaged. Wafer testing is very necessary to reduce the production cost of chips and improve the quality of ch...

AI Technical Summary

Problems solved by technology

[0009] At present, in the prior art scheme, the fuse probe and the test probe are arranged on the same chip in the above steps, Figure 1 is when using the existing probe card to test the chip 103, the probe is on the chip 103 The enlarged schematic view of the corresponding position, because the fuse probe 122 and the test probe 121 on the probe are in contact with the fuse probe contact and the test probe contact on the chip 103 at the same time, so that when the chip 103 is tested, the fuse There is a path between the probe and the fuse probe contact, and between the test probe and the test probe contact, resulting in the interference of the fuse probe to the test of the integrated circuit chip

[0010] In addition, the test environment of the chip during the wafer test is completely different from the use environment after the chip is packaged, which greatly increases the interference of the external environment on the chip during the wafer test

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