Method and apparatus for inspecting line width on printed board
US5272761A · kind A · utility
8Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1991 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Oct 25, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An operator for detecting the width of a wiring line on a printed board comprises plurality of arms. Pixels on each arm increase in size toward the end of the arm. When the width of a narrow wiring line is detected on small pixels, while the width of a wide line is detected on large pixels. The operater is obtained by converting a wiring pattern signal into a plurality of signals corresponding to different pixel sizes and then combining respective parts of the plurality of signals with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.