Back to results
US 2019/0080824 A1Published application
Pptc material with low percolation threshold for conductive filler
AssigneeLittelfuse, Inc.
InventorsJianhua Chen, Chun Kwan Tsang
Life of this patent
Estimating the term…
Abstract
A polymeric positive temperature coefficient (PPTC) device including a PPTC body, a first electrode disposed on a first side of the PPTC body, and a second electrode disposed on a second side of the PPTC body, wherein the PPTC body is formed of a PPTC material that includes a polymer matrix and a conductive filler, wherein the conductive filler defines 20%-39% by volume of the PPTC material.
Claims16
A polymeric positive temperature coefficient (PPTC) device, comprising:
- a PPTC body;
- a first electrode disposed on a first side of the PPTC body;
- and
- a second electrode disposed on a second side of the PPTC body;
- wherein the PPTC body is formed of a PPTC material that includes a polymer matrix and a conductive filler, wherein the conductive filler defines 20%-39% by volume of the PPTC material.
2 more elements
A polymeric positive temperature coefficient (PPTC) material comprising:
- a polymer matrix;
- and
- a conductive filler;
- wherein the conductive filler defines 20%-39% by volume of the PPTC material.
1 more element
A polymeric positive temperature coefficient (PPTC) device, comprising:
- a PPTC body;
- first and second metallic foil layers disposed on opposing sides of the PPTC body, respectively, and extending from first and second metallic traces at opposing ends of the PPTC body, respectively, wherein the first metallic foil layer extends toward, but does not contact, the second metallic trace, and wherein the second metallic foil layer extends toward, but does not contact, the first metallic trace;
- electrically insulating insulation layers covering the first and second metallic foil layers;
- and
- metallic electrodes disposed on the insulation layers in electrical contact with the metallic traces;
- wherein the PPTC body is formed of a PPTC material that includes a polymer matrix and a conductive filler, wherein the conductive filler defines 20%-39% by volume of the PPTC material.
3 more elements
Dependencies are inferred from the claim text.