Solder bump forming method
US7807560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2008 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Dec 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/124
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A solder bump forming method of carrying out a reflow treatment over a conductive ball mounted on a plurality of pads, thereby forming a solder bump, includes a metal film forming step of forming a metal film capable of chemically reacting to a tackifying compound on the pads, an organic sticking layer forming step of causing a solution containing the tackifying compound to chemically react to the metal film, thereby forming an organic sticking layer on the metal film, and a conductive ball mounting step of supplying the conductive ball on the pads having the organic sticking layer formed thereon, thereby mounting the conductive ball on the pads through the metal film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.