Lead bonding of chips to circuit boards and circuit boards to circuit boards
US5054192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1987 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | May 21, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49153
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for interconnecting electronic circuits using nearly pure soft annealed gold mechanically compressed within through-plated holes. The invention has its application in attaching integrated circuit dice directly to circuit boards by ball bonding gold wires to the bonding pads of the integrated circuit dice in a substantially perpendicular relationship to the surfaces of the dice and inserting the gold leads into through-plated holes of circuit boards which provide an electrical and a mechanical connection once the leads are compressed within the through-plated holes. The present invention also finds its application in the interconnection of sandwiched circuit board assemblies where soft gold lead wires are inserted into axially aligned through-plated holes of the circuit boards and compressed so that the hold lead wires compress and buckle within the through-plated holes, forming an electrical connection between the circuit boards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.