Method for obtaining three-dimensional data from multiple parts or devices in a multi-pocketed tray
US5463227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1992 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Jun 24, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2831
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and arrangements are provided to efficiently use 3-D vision systems to measure selected features of objects that are semi-constrained in compartmented trays having a uniform geometric arrangement. The methods are particularly well suited for optimizing the 3-D measurement of leads on integrated circuit devices which are packaged in trays. For obtaining the three-dimensional data, a multi-pocketed tray is provided with tray pockets arranged in rows and columns. Corresponding sides of the multiple parts or devices in a row or column are scanned sequentially with at least one three-dimensional sensor. This scanning procedure is repeated for all rows and columns containing sides of the devices from which data is to be obtained. The devices can be first aligned by applying directional vibration to the tray to drive all the parts or devices to the same corner or side of the respective pockets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.