Position sensing system for inspection handling system
US6735927B2 · kind B2 · utility
0Cited by
16References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Nov 28, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/67721
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A drive for a carrier tape used in conjunction with a pick and place module of a machine for inspecting and handling advances the carrier tape to its desired position in two steps. Using the number of sprocket holes between compartments in the tape (n holes), the first step is n−1 sprocket holes. The second step takes the carrier tape the remaining distance to complete the advance to the distance equal to n sprocket holes. The tape is driven by friction rollers not by the use of the sprocket holes. The presence of a device in a compartment and its proper positioning in the compartment is also inspected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.