Soldering flux containing a temperature sensitive chemically reactive colorant
US4563224A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1984 |
| Grant date | Jan 7, 1986 |
| Priority date | — |
| Expiry date | Dec 19, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A heat-recoverable soldering device comprises a heat-recoverable member having a fusible solder insert and associated with the solder insert, a solder flux composition which undergoes a visible color change at a critical temperature. Solderable substrates are positioned within the device and heated until a critical temperature has been reached as indicated by a color change in the flux. The critical temperature depends on the material of the particular heat-recoverable member and the solder used. It is that temperature which is required to effect a solder joint between the substrates and recovery of the heat-recoverable member. Novel flux compositions and their use in soldering are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.