Elastomeric conductive composite interconnect
A moldable interconnect device for providing an electrical connection between two or more opposing arrays of contacts for establishing an electrical circuit. The moldable interconnect device having an insulting substrate and an array of conductive elements held in the insulating substrate, the conductive elements are made of an elastomeric conductive composite. The composite having a polymeric matrix comprising a crosslinked polymer. The polymer having a curing agent for catalyzing crosslinking of the polymer matrix and conductive metal particles and non-conductive compressible rubber particles dispersed with the polymer matrix. The non-conductive compressible rubber particles having a greater compressibility than the elastomeric conductive composite that is the same as the elastomeric conductive composite but free of non-conductive compressible rubber particles.
1 . A moldable interconnect device for providing an electrical connection between two or more opposing arrays of contacts for establishing an electrical circuit, the moldable interconnect device comprising:
an insulting substrate;
an array of conductive elements held in the insulating substrate, wherein the conductive elements are made of an elastomeric conductive composite, the composite comprising:
a polymeric matrix comprising a crosslinked polymer;
a curing agent for crosslinking of the polymer matrix, and
conductive metal particles and non-conductive compressible rubber particles dispersed with the polymer matrix, the non-conductive compressible rubber particles having a greater compressibility than the elastomeric conductive composite that is the same as the elastomeric conductive composite but free of non-conductive compressible rubber particles.
2 . The moldable interconnect device as recited in claim 1 , wherein the conductive elements are pillars having opposite first and second ends, the pillars being conductive between the first and second ends.
3 . The moldable interconnect device as recited in claim 2 , wherein the resistance through each pillar is less than 1 Ohm.
4 . The moldable interconnect device as recited in claim 2 , wherein the insulating substrate has opposite first and second outer surfaces, the first and second outer surfaces being planar and parallel to each other.
5 . The moldable interconnect device as recited in claim 2 , wherein the conductive elements are made of elastomeric conductive composite comprising at least 20 vol % of non-conductive compressible rubber particles.
6 . The moldable interconnect device as recited in claim 1 , wherein the crosslinked polymer comprises an elastomer.
7 . The moldable interconnect device as recited in claim 1 , wherein the polymeric matrix comprises silicone.
8 . The moldable interconnect device as recited in claim 1 , wherein the polymeric matrix has a Shore A hardness of more than 20.
9 . The moldable interconnect device as recited in claim 1 , wherein the conductive metal particles are selected from the group consisting of silver, silver coated particles, gold, and gold coated particles.
10 . The moldable interconnect device as recited in claim 1 , wherein the conductive metal particles have an average size of less than 50 μm.
11 . The moldable interconnect device as recited in claim 1 , wherein the concentration of the conductive metal particles is 15 vol % to 40 vol % with respect to the polymer matrix.
12 . The moldable interconnect device as recited in claim 1 , wherein the non-conductive compressible rubber particles comprise silicone microspheres.
13 . The moldable interconnect device as recited in claim 1 , wherein the non-conductive compressible rubber particles have an average size of 0.1 to 1000 μm.
14 . The moldable interconnect device as recited in claim 1 , wherein the concentration of the non-conductive compressible rubber particles in the elastomeric conductive composite is of 1 vol % to 20 vol %.
15 . The moldable interconnect device as recited in claim 1 , wherein the concentration of the non-conductive compressible rubber particles in the elastomeric conductive composite is of 20 vol % to 60 vol %.