Method of and apparatus for inspecting width of wiring line on printed board
US5367467A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1991 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Nov 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30141
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A cross operator is applied to the image of a wiring pattern provided on a printed board, to obtain respective sizes of the image in first and second directions. When the condition that the size of the wiring pattern in one of first and second directions is larger than a threshold value but the size in the other direction is smaller than the threshold value is satisfied, it is decided that the wiring pattern is a wiring line., The width of the wiring line is measured with the operator and is compared with a predetermined allowable range of the width. A land and a pin hole which may be present on the printed board do not satisfy the condition for detecting the wiring line and accurate inspection of the wiring line is attained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.