Silicon Wafer Sorting by Diameter

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Silicon Wafer Sorting

Sorting wafers for the production of high-performance, cost-effective wafer testing services in the semiconductor industry. [Sources: 3]

The individual integrated circuits of a wafer are tested for functional defects in a single step before being sent into a prepared matrix and a special test pattern is applied. Wafer tests are carried out by a test device called a "wafer prober," and the most commonly used is probably the "wafer prober test" (WPRB).

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Silicon Wafer Sorting Steps

Over the past decade, we have solved many wafer test challenges, and optimal designs, including the use of automated test equipment and the development of new technologies, can bring benefits. Demand for high-performance, cost-effective wafers is increasing in the semiconductor industry. This increase in use, as well as the availability of more advanced technologies, would drive the market for cotton testing services in the coming years. [Sources: 0, 4, 7]

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Researcher Sorting Silicon Wafers



It goes without saying that every time you lower the probe card, you have to have a special bonding pad on the semiconductor chip on which the probe needle hits, "he said. [Sources: 1]

Only one probe card can be connected to each silicon wafer in the test head (10), and the wafers and probe cards (514) would come into contact with it. The first wafers (608) are placed on the front of the first test head, in a position of contact with the probe card (614). The second wafers can then be positioned on the back or on the right side and on top of each other, either on the left or right side of a second test head. There can be spots on the back and sides, from both waves on a test head. [Sources: 8]

The first wafer is tested before the second wafer is loaded, and the third wafer is then attached to the wafer in its place in the test head. After the first wafer has been tested and completed its test cycle, it can be removed from the wafer test heads. The second wafer is tested in its place and then the wafer handler will move to fetch the wafers for testing. Both weapons tests could take place simultaneously, but not simultaneously, due to the limited time available. [Sources: 8]

The wafer test step can be skipped if the production yield is higher than it is and the cubes are subjected to a blind assembly. There is then a further step in the process of separating the silicon chips, this step is called cutting the die. The semiconductor chips are completed after the first test, which identifies possible errors such as inadequate operating behavior, and keeps the wafers in their correct position for the next test cycle. [Sources: 1, 2, 9]

Finally, the usual processing of the wafers, in particular the removal of wafer masks, step errors and other possible errors (step 5), can be traced. We will eliminate the need to test an entire waffle machine to check for faults in the waders and the waste pacemakers. [Sources: 1, 2]

These tests are performed after the nozzle is manufactured to determine the strength of the wafers and to ensure that the processing does not affect their original strength. Wafer testing prior to wafer dilution may be incomplete if certain features added to post-wafer thinning are not present in the test. [Sources: 5, 10]

From the above point of view, it is obvious that the only thing that matters is to determine the strength of the wafers before they are diluted in the pre-wafer test process. The first is the "pre-test" that is carried out before the packaging process to determine the degree of high stress in which the package will induce the highly stressed silicone icon material. [Sources: 5]

The same PCB and wafer test head is used to test the PCB before the wafers are placed in the pre-packaging process and then again after the packaging. Printed circuit boards are used as wafer test heads to test the strength of the silicone material before and after application on the wafer. The same "circuit boards" and "wafer test head" are used for the second test, this time to test both the silicon icon and the highly loaded silicon icon. [Sources: 8]

To hold the wafers, wafer cartridges can be used to take advantage of the decreasing amount of wafer placement required to align them with the many probe positions on the probe card. Wafer cassettes can be wrapped in a "wafer holder" into which the wafers are placed so that they can be easily transported to the combustion unit during the manufacturing cycle. [Sources: 8]

This allows the various circuit functions of the wafers to be tested and different circuits and functions to be tested on them. The wafer to be tested is manually brought into contact with its probe card via a "wafer handler" or a machine device. This contact, known as a "probe card," is held by a series of electrical contacts that are moved by the vacuum of the wafer - mounted as a "wafer chuck." [Sources: 8, 9]

To test a semiconductor chip on a wafer completely, it is necessary to perform a multiple or descent operation on the probe card. This is because it is necessary to use existing probe wafers and technology to contact all processes essential for the pad, die and wafer simultaneously. [Sources: 1, 6]

 

 

Sources:

[0]: https://www.intechopen.com/books/mems-sensors-design-and-application/mems-technologies-enabling-the-future-wafer-test-systems

[1]: https://www.google.com/patents/US6549028

[2]: https://patents.google.com/patent/US7218093B2/en

[3]: https://www.transparencymarketresearch.com/silicon-wafer-reclaim-market.html

[4]: https://www.futuremarketinsights.com/reports/wafer-testing-services-market

[5]: https://www.google.com.pg/patents/US5992242

[6]: https://www.eesemi.com/wl_test_bi.htm

[7]: https://www.semiconductor-digest.com/2019/09/24/revolutionizing-wafer-testing-to-bring-new-technologies-to-market/

[8]: https://www.google.si/patents/US7378860

[9]: https://en.wikipedia.org/wiki/Wafer_testing

[10]: https://www.freepatentsonline.com/y2018/0040522.html