Method of holding a component using an anhydride fluxing agent
US5704116A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1996 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | May 3, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A solution (20) is dispensed onto bond pads (18) on a substrate (14). An integrated circuit component (12) that includes solder bumps (16) formed on component bond pads (30) is superposed onto the substrate (14) such that the solder bumps (16) rest against the bond pads (18). The solution (20) includes an anhydride compound that acts as a fluxing agent. The subassembly (11) is heated to a temperature sufficient to bond the solder bumps (16) to the bond pads (18) to form solder bump interconnections (26). During the bonding process, the fluxing agent substantially vaporizes and leaves virtually no residue on the substrate (14) to allow the component (12) to be effectively underfilled with a polymeric encapsulant (24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.