Low resistance polymer matrix fuse apparatus and method

• US 20050141164A1
• Filed: 02/24/2005
• Published: 06/30/2005
• Est. Priority Date: 01/10/2002
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Kamath, Hundi Panduranga, Manoukian, Daniel Minas, Bender, Joan Leslie, So, Peter York, Kalra, Varinder Kumar
• Granted Patent: US 7,385,475 B2
• Time in Patent Office: Days
• US Class Current: 361/104
• 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; and

a free standing fuse element layer independently formed and fabricated from each of said first and second intermediate insulation layers, said fuse element layer comprising first and second contact pads and a fusible link extending therebetween;

wherein first and second intermediate insulation layers extend on opposite sides of said free standing fuse element layer and are laminated together with said fuse element layer therebetween.

2. A low resistance fuse in accordance with claim 1 wherein at least one of said first and second 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 insulation 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 method of fabricating a low resistance fuse, said method comprising:

providing a first intermediate insulation layer;

providing a pre-formed fuse element layer separate from the first intermediate layer, said pre-formed fuse element layer having a fusible link extending between first and second contact pads; and

adhesively laminating a second intermediate insulation layer to the first intermediate insulation layer over the fuse element layer.

10. A method in accordance with claim 9 wherein said adhesively laminating comprises laminating a polymer adhesive film.

11. A method in accordance with claim 9 wherein said adhesively laminating comprises laminating with an adhesive having arc suppressing characteristics.

12. A method in accordance with claim 9 further comprising providing a first outer insulation layer and a second outer insulation layer, and adhesively laminating the first outer insulation layer to the first intermediate layer and adhesively laminating the second outer insulation layer to the second intermediate insulation layer.

13. A method in accordance with claim 12, wherein the fuse element layer, the first intermediate insulation layer, the second intermediate insulation layer, the first outer insulation layer and the second outer insulation layer are simultaneously laminated to one another.

14. A method in accordance with claim 9 wherein providing a first intermediate insulating layer comprises providing a first intermediate insulating layer having a fuse element opening pre-formed therein, and said method further comprises applying an M-spot to the fusible link through the fuse element opening after the second intermediate insulation layer is laminated to said first intermediate layer.

15. A method in accordance with claim 9 wherein one of the first and second intermediate insulating layers includes an opening, and said adhesively laminating a second intermediate insulation layer to the first intermediate insulation layer over the fuse element layer comprises positioning the opening to overlie said fusible link.

16. A method in accordance with claim 9 wherein providing a pre-formed fuse element comprises providing a free standing thin film foil defining the fusible link and the first and second contact pads.

17. A method in accordance with claim 9 further comprising forming termination slots or holes formed into lateral ends of the fuse element layer, the first intermediate insulation layer, and the second intermediate insulation layer.

18. A method in accordance with claim 9 wherein providing a first intermediate insulating layer comprises providing a layer of polymer material.

19. A method in accordance with claim 9 further comprising applying an arc quenching media proximate the fusible link.

20. A method in accordance with claim 9 further comprising forming an M-spot on said fusible link.

21. A low resistance fuse comprising:

first and second intermediate insulation layers, at least one of said first and second intermediate insulation layers comprising a pre-formed opening therethrough;

a thin foil fuse element layer separately formed from said first and second intermediate insulation layers;

wherein the first and second intermediate insulation layers extend on opposite sides of said fuse element layer and are coupled thereto; and

an arc quenching media is located within said pre-formed opening and surrounding said fuse element layer within said opening.

22. A low resistance fuse in accordance with claim 21 further comprising termination slots or holes formed into lateral ends of said fuse element layer, said first intermediate insulation layer, and said second intermediate insulation material.

23. A low resistance fuse in accordance with claim 21 further comprising first and second outer insulation layers laminated to respective said first and second intermediate insulation layers.

24. A low resistance fuse comprising:

a first intermediate insulation layer;

a second intermediate insulation layer; and

a fuse element layer comprising a fusible link having at least one weak spot formed therein;

wherein first and second intermediate insulation layers extend on opposite sides of said free standing fuse element layer and are laminated together with said fuse element layer therebetween.

25. A fuse in accordance with claim 24, wherein said fusible link includes multiple weak spots, and at least one of said first intermediate insulation layer and said second intermediate insulation layer comprises multiple openings therethrough corresponding in location to said multiple weak spots.

26. A fuse in accordance with claim 24, further comprising at least one outer insulation layer enclosing said multiple openings of said at least one of said first intermediate insulation layer and said second intermediate insulation layer.

27. A fuse in accordance with claim 24 wherein said fusible link includes at least one M-spot formed thereon.

28. A fuse in accordance with claim 24 further comprising an arc quenching media proximate said fusible link.