Packaging process using a wedge device for linear force amplification in a press
US6030569A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1997 |
| Grant date | Feb 29, 2000 |
| Priority date | — |
| Expiry date | Jun 19, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/129
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wedge device for a press for controllably exerting high amounts of force in a clamping operation during a semiconductor packaging process and for facilitating a linear force output in relation to its input. The wedge device is powered by a servo motor which is coupled to a planetary screw by a set of pulleys and a timing belt. The screw is mated with a nut which is prevented from rotating so that the rotation of the screw causes the nut to move in a linear direction. Metal extensions join the nut to a bottom wedge such that the wedge moves together with the nut. Slidably disposed on top of the bottom wedge is a block bearing firmly attached to a complementary wedge. The complementary wedge is free to move in a vertical direction but not in a horizontal direction. As the bottom wedge moves in a horizontal direction, the complementary wedge moves in a vertical direction. The complementary wedge is placed underneath a press to provide the clamping force necessary for a semiconductor packaging operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.