Apparatus and method for detecting accuracy of drill holes on a printed circuit board
US6384911B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Sep 19, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/0047
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention proposes an apparatus and a method for detecting the accuracy of drilled holes on a PCB, which can detect the positions, sizes, counts, and wall roughness of drilled holes on a PCB. The apparatus comprises an optical scanning tool and a platform situated below the optical scanning tool. The optical scanning tool can be positioned and moved. Two projecting light sources of parallel light beam are installed thereon to project light to the PCB. A signal receiver is installed between the two projecting light sources. A magnification lens is installed below the signal receiver. The signal receiver receives the light signal of the two projecting light sources reflected from the PCB via the magnification lens. The platform is used to place the PCB. The platform can move with respect to the optical scanning tool to control the distance between the optical scanning tool and the platform. Through the reception of reflected light signals from different positions of the PCB by the signal receiver, the data of drilled holes on the PCB can be calculated out by a computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.