Pyrotechnic igniter arrangement with integrated mechanically decoupled electronic assembly

US6659010B2 · kind B2 · utility

Assignee

• Conti Temic microelectronic GmbH · DE

Inventors

• Thomas Goernig · Markt Indersdorf, DE
• Holger Wulff · Ingolstadt, DE

Key dates

• Filing date: May 13, 2002
• Grant date: Dec 9, 2003
• Expiry date: May 13, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42B3/121
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A pyrotechnic igniter arrangement, especially for occupant protection devices in motor vehicles, includes a single common carrier substrate, an electronic assembly arranged on the carrier substrate in an electronic zone, an electrically ignitable ignition bridge arranged on the carrier substrate in a pyrotechnic zone, and a pyrotechnic charge in the pyrotechnic zone. A mechanical decoupling or parting feature, such as a frangible link or an elastically bendable neck, is provided in the carrier substrate between the pyrotechnic zone and the electronic zone, so that forces arising during ignition of the pyrotechnic charge are not transmitted through the carrier substrate into the electronic zone. The decoupling feature breaks or elastically yields when a load exceeding a prescribed threshold is applied thereto. The electronic assembly is protected from damage due to excessive loads, and remains functional even after ignition of the pyrotechnic charge.