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Patent 7322294 Click For Printable Version of This Patent
Patent Information:  USPTO Site Listing

Patent Number: 7322294
Case ID: 97916
Patent Title: Integrated thin film explosive micro-detonator
Status: ACTIVE
Status Date: 4/15/2008 9:32:50 AM
Issue Date: 1/29/2008
Filed Date: 2/24/2006
Serial #: 1/362,596
Assignee Name: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Inventor(s): Laib, Gerald
Lab Information:  View Lab Profile

Lab Name: NAVSEA Indian Head
Location: 101 Strauss Avenue
Indian Head, MD 20640-5035
Contact: Contact Lab About This Patent
   
Description:
STATEMENT OF GOVERNMENT INTEREST

The invention described herein may be manufactured and used by or for the Government of the United States of America for government purposes without the payment of any royalties therefor.

BACKGROUND OF THE INVENTION

The invention relates in general to explosive and ignition trains for safety-and-arming devices and in particular to explosive and ignition trains for use with microelectromechanical systems (MEMS) safety-and-arming devices.

MEMS safety-and-arming devices currently being conceived and developed require detonating sources of a size such that conventional detonator fabrication techniques cannot be practically and economically employed. The detonating sources for state of the art MEMS safety-and-arming devices preferentially employ a maximum size of one cubic millimeter (mm). By comparison, the smallest mechanical detonator ever to enter widespread production has a total volume of nearly 34 cubic mm with a maxi . . . . More
Abstract:
A method of making a thin film explosive detonator includes forming a substrate layer; depositing a metal layer in situ on the substrate layer; and reacting the metal layer to form a primary explosive layer. The method and apparatus formed thereby integrates fabrication of a micro-detonator in a monolithic MEMS structure using "in-situ" production of the explosive material within the apparatus, in sizes with linear dimensions below about 1 mm. The method is applicable to high-volume low-cost manufacturing of MEMS safety-and-arming devices. The apparatus can be initiated either electrically or mechanically at either a single point or multiple points, using energies of less than about 1 mJ.
Claims:
What is claimed is:

1. An explosive train, comprising: a fixed initiator element comprising a base layer, an unreacted metal substrate layer and a primary explosive layer; an acceptor explosive; and a mobile slider element being movable between an unarmed position that is out of line with the fixed initiator element and the acceptor explosive and an armed position that is in line with the fixed initiator element and the acceptor explosive, wherein the mobile slider element is comprised of a base layer, an unreacted metal substrate layer and a primary explosive layer, the base layer including a barrel formed therein, wherein an open end of the barrel is adjacent the acceptor explosive when the mobile slider element is in the armed position, and wherein the primary explosive layer of the mobile slider element is adjacent the primary explosive layer of the fixed initiator element when the mobile slider element is in the armed position.

2. The explosive train of claim  . . . . More