Video probe aligning of object to be acted upon
US4924304A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1987 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Nov 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/1216
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An aligning system includes an object to be acted upon at predetermined locations, such as a circuit board to receive solder paste. There is a device, such as a stencil, characterized by the pattern for acting upon the object. A video probe is arranged to look at both the device and the object for providing image signals representative of both. A comparator compares the image signals to provide an error signal representative of misalignment between the device and object. A positioner responsive to the error signal relatively positions the device and object to reduce the error. An operator causes the device to operate upon the object at the predetermined locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.