Patent US516789A successfully refreshed from Google Patents.
Patent US5851644A successfully refreshed from Google Patents.
US5851644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Films and coatings having anisotropic conductive pathways therein
Assignee: Henkel Loctite Ireland Ltd
•
Filing: 1996-07-25
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Granted: 1998-12-22
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Expires: 2016-07-25
Abstract
Abstract An anisotropically-conductive film or a substrate having a surface coated with an anisotropically-conductive coating, said film or coating being formed by solidifying a composition comprising (i) a solidifiable ferrofluid composition, the ferrofluid comprising a colloidal suspension of ferromagnetic particles in a non-magnetic carrier, and (ii) a plurality of electrically-conductive particles, dispersed in the ferrofluid, the electrically-conductive particles having been arrayed in a non-random pattern by application of a substantially uniform magnetic field to the composition in a liquid state and having been locked in position by solidification of the composition. The composition is solidified in an A-stage, usually involving a primary cure. In end-use application of the film or coating, the composition usually undergoes a B-stage or secondary cure. The film or coated substrate is an article of manufacture for bonding conductors in the electronics industry.
Inventors
- 👤 Ciaran B. McArdle
- 👤 Joseph Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:12
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H05K3/323; H01; H01F; H01F41/00; H01F41/14; H01F41/16; H01R; H01R4/00; H01R4/04; H05K2201/00; H05K2201/08; H05K2201/083; H05K2203/00; H05K2203/10; H05K2203/104; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/25; Y10T428/256; Y10T428/257
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
115 words
An anisotropically-conductive film or a substrate having a surface coated with an anisotropically-conductive coating, said film or coating having been formed by solidifying a solidifiable ferrofluid composition, the solidifiable ferrofluid composition comprising (i) a colloidal suspension of ferromagnetic particles in a non-magnetic carrier, and (ii) a plurality of electrically-conductive particles dispersed in the ferrofluid composition, said electrically-conductive dispersed particles having an average particle size which is about 10 times or more than the particle size of said ferromagnetic particles, said electrically-conductive particles having been arrayed in a non-random pattern by application of a substantially uniform magnetic field to the composition in a liquid state and having been locked in position by solidification of the composition.
Claim 2
Dependent Claim
115 words
An anisotropically-conductive film or a substrate having a surface coated with an anisotropically-conductive coating, said film or coating having been formed by solidifying a solidifiable ferrofluid composition, the solidifiable ferrofluid composition comprising (i) a colloidal suspension of ferromagnetic particles in a non-magnetic carrier, and (ii) a plurality of electrically-conductive particles dispersed in the ferrofluid composition, said electrically-conductive dispersed particles having an average particle size which is about 10 times or more than the particle size of said ferromagnetic particles, said electrically-conductive particles having been arrayed in a non-random pattern by application of a substantially uniform magnetic field to the composition in a liquid state and having been locked in position by solidification of the composition.
Claim 3
Dependent Claim
32 words
A film or coated substrate according to claim 1 wherein the solidifiable ferrofluid composition was curable and comprised at least a primary cure system which had been activated to solidify said composition.
Claim 4
Dependent Claim
36 words
A film or coated substrate according to claim 2 wherein the composition contains a latent cure system which is activatable to further cure said film or coating at a time subsequent to solidification of the composition.
Claim 5
Dependent Claim
20 words
A film or coated substrate according to claim 1 wherein the electrically conductive particles have substantially uniform sizes and shapes.
Claim 6
Dependent Claim
28 words
A film or coated substrate according to claim 4, wherein said film or coating has a thickness is substantially equal to the average diameter of the electrically-conductive particles.
Claim 7
Dependent Claim
117 words
An anisotropically-conductive film or substrate coating formed by (a) applying to a substrate, a layer of a solidifiable ferrofluid composition comprising a colloidal suspension of ferromagnetic particles in a non-magnetic carrier liquid, and a plurality of electrically-conductive particles, dispersed in the ferrofluid composition, the electrically-conductive particles having an average particle size about 10 times or more than that of said ferromagnetic particles; (b) exposing the solidifiable ferrofluid composition to a magnetic field to array the electrically-conductive particles in a non-random pattern; (c) concurrent with or subsequent to step (b), exposing the solidifiable ferrofluid composition to solidifying conditions for the composition; and (d) optionally removing the layer of solidified ferrofluid composition from the substrate to form a film.
Claim 8
Dependent Claim
117 words
An anisotropically-conductive film or substrate coating formed by (a) applying to a substrate, a layer of a solidifiable ferrofluid composition comprising a colloidal suspension of ferromagnetic particles in a non-magnetic carrier liquid, and a plurality of electrically-conductive particles, dispersed in the ferrofluid composition, the electrically-conductive particles having an average particle size about 10 times or more than that of said ferromagnetic particles; (b) exposing the solidifiable ferrofluid composition to a magnetic field to array the electrically-conductive particles in a non-random pattern; (c) concurrent with or subsequent to step (b), exposing the solidifiable ferrofluid composition to solidifying conditions for the composition; and (d) optionally removing the layer of solidified ferrofluid composition from the substrate to form a film.
Claim 9
Dependent Claim
59 words
A solid-form anisotropically-conductive film or a substrate having a surface coated with a solid-form anisotropically-conductive coating, said film or coating comprising a composition containing colloidal ferromagnetic particles and a plurality of electrically-conductive particles having an average particle size which is about 10 times or more than that of the ferromagnetic particles arrayed in the composition in a non-random pattern.
Claim 10
Dependent Claim
59 words
A solid-form anisotropically-conductive film or a substrate having a surface coated with a solid-form anisotropically-conductive coating, said film or coating comprising a composition containing colloidal ferromagnetic particles and a plurality of electrically-conductive particles having an average particle size which is about 10 times or more than that of the ferromagnetic particles arrayed in the composition in a non-random pattern.
Claim 11
Dependent Claim
28 words
A film or coated substrate according to claim 7 wherein the composition contains a latent cure system which is activatable to cure said solid-form anisotropically-conductive film or coating.
Claim 12
Dependent Claim
22 words
A substrate having conductors thereon, and having an anisotropically conductive film or coating as defined in claim 1 applied to said conductors.
Claim 13
Dependent Claim
24 words
A substrate according to claim 9 wherein the anisotropically-conductive coating contains a latent cure system which is activatable to cure said film or coating.
Claim 14
Dependent Claim
19 words
A film or coated substrate according to claim 1 wherein the electrically conductive particles are arrayed in a monolayer.
Claim 15
Dependent Claim
19 words
A film or substrate coating according to claim 6 wherein the electrically conductive particles are arrayed in a monolayer.
Claim 16
Dependent Claim
19 words
A film or coated substrate according to claim 7 wherein the electrically conductive particles are arrayed in a monolayer.
Claim 17
Dependent Claim
17 words
A film or coated substrate according to claim 1 wherein the electrically conductive particles are substantially non-magnetic.
Claim 18
Dependent Claim
17 words
A film or substrate coating according to claim 6 wherein the electrically conductive particles are substantially non-magnetic.
Claim 19
Dependent Claim
17 words
A film or coated substrate according to claim 7 wherein the electrically conductive particles are substantially non-magnetic.
Claim 20
Dependent Claim
35 words
A film or coated substrate according to claim 1 wherein the composition contains a latent cure system which is activatable to cure said film or coating at a time subsequent to solidification of the composition.
Claim 21
Dependent Claim
93 words
An anisotropically-conductive film or a substrate having a surface coated with an anisotropically-conductive coating, said film or coating having been formed by solidifying a solidifiable ferrofluid composition, the solidifiable ferrofluid composition comprising (i) a colloidal suspension of ferromagnetic particles in a non-magnetic carrier, and (ii) a plurality of electrically-conductive substantially non-magnetic particles dispersed in the ferrofluid composition, said electrically-conductive particles having been arrayed in a non-random pattern by application of a substantially uniform magnetic field to the composition in a liquid state and having been locked in position by solidification of the composition.
Claim 22
Dependent Claim
93 words
An anisotropically-conductive film or a substrate having a surface coated with an anisotropically-conductive coating, said film or coating having been formed by solidifying a solidifiable ferrofluid composition, the solidifiable ferrofluid composition comprising (i) a colloidal suspension of ferromagnetic particles in a non-magnetic carrier, and (ii) a plurality of electrically-conductive substantially non-magnetic particles dispersed in the ferrofluid composition, said electrically-conductive particles having been arrayed in a non-random pattern by application of a substantially uniform magnetic field to the composition in a liquid state and having been locked in position by solidification of the composition.
References Cited (Backward Citations)
US2718506A
Cited
GB919502A
Cited
US3359145A
Cited
US3661744A
Cited
US3898349A
Cited
US3580776A
Cited
US4008341A
Cited
US3843540A
Cited
US3917538A
Cited
US4092376A
Cited
US4100088A
Cited
JPS5414193A
Cited
US4170677A
Cited
US4368131A
Cited
GB2053493A
Cited
US4215209A
Cited
US4430239A
Cited
US4606962A
Cited
US4846988A
Cited
US4645611A
Cited
US4548862A
Cited
US4698907A
Cited
EP0208391A2
Cited
US4604229A
Cited
US4687596A
Cited
JPS62127194A
Cited
US4644101A
Cited
US5076950A
Cited
US4935147A
Cited
EP0232127A2
Cited
US4740657A
Cited
US4737112A
Cited
US4808638A
Cited
US4701276A
Cited
US4741850A
Cited
US4855079A
Cited
US4867910A
Cited
US5085789A
Cited
US4946613A
Cited
EP0299618A2
Cited
US4963220A
Cited
US4938886A
Cited
EP0330452A2
Cited
US4965007A
Cited
US5104582A
Cited
JPH0395298A
Cited
US5128215A
Cited
US5064550A
Cited
EP0402546A2
Cited
US5167850A
Cited
US5180888A
Cited
US5075034A
Cited
US4992190A
Cited
US5124060A
Cited
US5543397A
Cited
US5147573A
Cited
US5141970A
Cited
US5084490A
Cited
WO1993001248A1
Cited
US5169471A
Cited
EP0549159A2
Cited
US5221417A
Cited
US5438223A
Cited
US5349478A
Cited
US5429701A
Cited
US5453148A
Cited
JPH06122857A
Cited
US5382373A
Cited
US5346558A
Cited
US5486427A
Cited
US5366140A
Cited
WO1995018476A1
Cited
US5522962A
Cited
WO1995020820A1
Cited
EP0691660A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-21 | 2002-06-22 | 2002-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-21 | 2006-06-22 | 2006-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-21 | 2010-06-22 | 2010-12-22 | $7700.00 | Window Closed / Lapsed |