Wire-bonding method, wire-bonding apparatus, and semiconductor device produced by the wire-bonding method
US5285949A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Jul 1, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3025
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a wire bonding method and a wire bonding apparatus employing a coated wire in which the surface of a metal wire is coated with an insulator, and a semiconductor device produced by the bonding method. The present invention includes forming a mixed gas of (1) a combustible gas and (2) a temperature controlling gas for lowering the combustion temperature of the mixture; and removing the insulator coating material from the coated wire at a bonding part of the coated wire, so as to denude the surface of a metal wire, by the use of flames produced by the combustion of the combustible gas of the mixed gas. The removal of the insulator is executed by an insulator removal torch. Also, the present invention includes forming a metal ball on the front end of a coated wire; joining the metal ball to an external terminal of a semiconductor chip; bringing the rear end of the coated wire into contact with an external lead and destroying the insulator coating where the coated wire contacts the lead; and joining the metal wire at the rear end of the coated wire to the lead. According to the above-stated expedients, the combustion flames, which do not impose any damag…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.