Method and apparatus for inspecting printed circuit board
US4758782A · kind A · utility
38Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1986 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Sep 10, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/95638
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for inspecting a printed circuit board wherein scanned image data are digitized and analyzed according to a feature extraction method and a mutual comparison method. The result of both of the analysis methods is combined with predetermined conditions to control output devices including a CRT display or a marking device. The two complementary methods compensate each others drawbacks so that the reliability of inspection can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.