Method for processing leadframe
US6594889B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1999 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Nov 8, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53187
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A method of processing a leadframe involves steps of transporting a leadframe to load it into a lead processing unit including plural sets of processing presses; adjusting a press pitch of the processing presses according to a work pitch of workpieces on the leadframe by rotating a nut member that is coupled to at least one of the processing presses and engaged on a non-rotating screw shaft extending in the transport direction of the leadframe, so that the nut member moves along the screw shaft and the respective processing press coupled thereto moves with the nut member; and performing a predetermined lead processing on the leadframe using the processing presses after the step of adjusting the press pitch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.