Method for increasing contact area between a viscous liquid and a substrate
US6291016A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jun 2, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S239/21
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of assembling electronic components using a dispenser having a nozzle in fluid communication with a source of viscous liquid having a high surface tension and having an air discharge passage in fluid communication with a source of pressurized air. A droplet of the viscous liquid is dispensed from the nozzle onto a printed circuit board to form an initial contact area between the droplet and the printed circuit board and the high surface tension of the droplet causes the initial contact area to remain substantially constant. A burst of air is then discharged from the air discharge passage for impinging the droplet after the droplet contacts the printed circuit board, which increases the initial contact area between the droplet and the printed circuit board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.