Integrated silicon bridge detonator
US4831933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1988 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Apr 18, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B3/13
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An explosive detonator consisting of an integrated circuit chip having a silicon substrate on which is formed an amorphous or polysilicon bridge, the bridge extending between two metal wire-bonding pads also on the substrate. The integrated circuit chip is disposed in close proximity to a primary charge such that when the bridge is energized by an electric current, it heats to the point where the charge is ignited. By back-etching the silicon substrate under the bridge, parasitic heat conduction is avoided. Further, by bonding a pyrex tube to the chip with the tube's bore surrounding the bridge, it is possible to pack the bore with an explosive train in fabricating the detonator assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.