Apparatus for transferring objects
US4221533A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1978 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | Aug 7, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/14
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A rotary pickup arm transfers objects from a fixed pickup station to a fixed deposition station during a first part of a work cycle and is returned to the pickup station during a second part of the work cycle. The pickup arm is carried by a head having a support mounted on an X-Y table movable relative to the pickup and deposition station by step motors along X and Y axes perpendicular to the axis of rotation of the pickup arm. The X-Y table can be adjustably displaced by predetermined amounts along the X and/or Y axes during the first part of the working cycle to place an object accurately at a desired location at the deposition station and displaced by an equal and opposite amount during the second part of the working cycle to pick up a further object from the pickup station. By this means objects may be transferred from the pickup station to precise locations on a carrier at the deposition stations so that (a) misplacement of the carrier relative to the pickup station location can be compensated and/or (b) several objects may readily be located precisely at different locations on the carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.