Pin attachment tool and method of capacitive brazing
US5192843A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1991 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Mar 14, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K3/0376
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method is provided to replace a damaged pin in a module for an integrated circuit assembly without damaging the circuit device or chip mounted in a circuitized substrate. This method comprises brazing a new pin to the base of the old pin by capacitive discharge brazing with a ribbon of compatible metal foil, requiring no flux, and is effected by firing the charge by completing a circuit which includes a pin attachment tool, the ribbon and the power supply, but in which circuit the chip is bypassed. The arc is struck and the new pin is brazed to the old without generating sufficient heat to damage the chip, and without conducting any current through the chip. The attachment tool is uniquely adapted to clamp the new pin and locate the pin precisely over the base of the old pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.