System and method for product yield prediction using a logic characterization vehicle
US6834375B1 · kind B1 · utility
222Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2002 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Oct 8, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A characterization vehicle includes at least one combinatorial logic circuit element, and a control circuit that controls the combinatorial logic circuit element. The control circuit includes an input mechanism for inputting a test pattern of signals into the combinatorial logic circuit element. An output mechanism stores an output pattern that is output by the combinatorial logic circuit element based on the test pattern. A ring bus connects the output means to the input means so as to cause oscillation. A counter counts a frequency of the oscillation, thereby to measure performance of the combinatorial logic circuit element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.