Low resistance polymer matrix fuse apparatus and method

• US 7,385,475 B2
• Filed: 02/24/2005
• Issued: 06/10/2008
• Est. Priority Date: 01/10/2002
• Status: Expired due to Fees

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Bender, Joan Leslie, So, Peter York, Kalra, Varinder Kumar, Kamath, Hundi Panduranga, Manoukian, Daniel Minas
• Primary Examiner(s): Vortman; Anatoly
• Application Number:
  US11/065,419
• Publication Number:
  US 20050141164A1
• Time in Patent Office: 1,202 Days
• Field of Search: 337/297, 337/232, 337/227, 337/228, 296/23
• US Class Current: 337/297
• CPC Class Codes: H01H 2085/0414 Surface mounted fuses
• CPC Class Codes: H01H 69/022 of printed circuit fuses
• CPC Class Codes: H01H 85/0047 Heating means
• CPC Class Codes: H01H 85/006 Heat reflective or insulating layer on the casing or on the fuse support
• CPC Class Codes: H01H 85/0411 Miniature fuses
• CPC Class Codes: H01H 85/046 Fuses formed as printed circuits
• CPC Class Codes: Y10T 29/49107 Fuse making

Abstract

A low resistance fuse apparatus and methods of manufacture includes a first intermediate insulation layer, a second intermediate insulation layer, and a free standing fuse element layer independently formed and fabricated from each of the first and second intermediate insulation layers, The fuse element layer includes first and second contact pads and a fusible link extending therebetween. The first and second intermediate insulation layers extend on opposite sides of the free standing fuse element layer and are laminated together with the fuse element layer therebetween.

Claims

1. A low resistance fuse comprising:

a first intermediate insulation layer;

a second intermediate insulation layer;

a third intermediate insulation layer;

a heat sink; and

a free standing fuse element layer comprising first and second contact pads and a fusible link extending therebetween;

wherein said first and third intermediate insulation layers extend on opposite sides of said free standing fuse element layer and are laminated together with said fuse element layer therebetween, and wherein said heat sink is adjacent to and laminated to said third intermediate layer, and wherein said second layer is adjacent to and laminated to said heat sink.

2. A low resistance fuse in accordance with claim 1 wherein at least one of said first and third intermediate layers comprises an opening overlying said fusible link.

3. A low resistance fuse in accordance with claim 1 wherein said fuse element layer comprises a thin film foil.

4. A low resistance fuse in accordance with claim 1 further comprising termination slots or holes formed into lateral ends of said fuse element layer, said first intermediate layer, and said second intermediate insulation layer.

5. A low resistance fuse in accordance with claim 1 further comprising first and second outer insulation layers laminated to said first and second intermediate insulation layers, respectively.

6. A low resistance fuse in accordance with claim 5 wherein at least one of said first and second outer insulation layers and at least one of said first and second intermediate insulation layers comprise a polymer material.

7. A low resistance fuse in accordance with claim 1 further comprising arc quenching media proximate said fusible link.

8. A low resistance fuse in accordance with claim 1 further comprising an M-spot formed on said fusible link.

9. A low resistance fuse in accordance with claim 1 wherein said fusible link comprises at least one weak spot formed therein.

10. A low resistance fuse in accordance with claim 1 wherein said fusible link comprises multiple weak spots, and at least one of said first intermediate insulation layer and said third intermediate insulation layer comprises multiple openings therethrough corresponding in location to said multiple weak spots.