Electronic device comprising an adhesive member having a plurality of conductive fiber sheets formed of a metal material coated on a non-conductive polymer fiber sheet
An electronic device according to an example embodiment of the present disclosure includes a first substrate, a conductive layer formed on the first substrate, a first pad electrode that is electrically connected to and extends from the conductive layer, a second substrate electrically connected to the first pad electrode, and an adhesive member disposed between the first pad electrode and the second substrate. The adhesive member includes a conductive fiber sheet. The electronic device according to various embodiments of the present disclosure uses an adhesive member which includes a plurality of conductive fiber sheets and an adhesive layer having an adhesive and conductive particles. Therefore, it is possible to easily attach electronic parts at a low temperature and a low pressure and minimize damages of the pad electrode and the substrate of the electronic parts which may be caused during the adhering process.
1. An electronic device, comprising:
a first substrate;
a conductive layer formed on the first substrate;
a first pad electrode that is electrically connected to and extends from the conductive layer;
a second substrate electrically connected to the first pad electrode; and
an adhesive member which is disposed between the first pad electrode and the second substrate, and
wherein the adhesive member includes a plurality of conductive fiber sheets and adhesive layer which is disposed on both surfaces of the plurality of conductive fiber sheets and the adhesive layer includes conductive particles and an adhesive, and
wherein each of the plurality of conductive fiber sheets is formed of a non-conductive polymer fiber sheet and a metal material coated on the non-conductive polymer fiber sheet.
2. The electronic device according to claim 1 , wherein the second substrate is electrically connected to a driving unit configured to supply signals to one or more electronic components on the first substrate.
3. The electronic device according to claim 2 , wherein the second substrate comprises a flexible circuit film that is electrically connected to a printed circuit board on which the driving unit is disposed.
4. The electronic device according to claim 1 , wherein the second substrate is a flexible printed circuit board.
5. The electronic device according to claim 1 , wherein a thickness of each of the conductive fiber sheets is within a range from 4 μm to 7 μm inclusive.
6. The electronic device according to claim 1 , wherein the adhesive is formed of an acrylic compound.
7. The electronic device according to claim 1 , wherein the conductive particles comprise metal particles having a diameter within a range from 2 μm to 6 μm, inclusive.
8. The electronic device according to claim 1 , wherein the conductive particles include copper and nickel.
9. The electronic device according to claim 8 , wherein a first portion of the conductive particles includes copper particles and a second portion of the conductive particles includes nickel particles.
10. The electronic device according to claim 1 , wherein a content of the conductive particles is within a range from 1.0 to 1.5 weight %, inclusive, with respect to the adhesive.
11. The electronic device according to claim 1 , wherein an adhesive strength of the adhesive member is 300 gf/cm or higher and a resistance of the adhesive member is 10Ω or lower.
12. The electronic device according to claim 1 , wherein the first substrate is a polymer film formed of at least one of polyethylene terephthalate (PET) or polycarbonate (PC).
13. The electronic device according to claim 1 , wherein the second substrate includes a plurality of second pad electrodes, and the first pad electrode is electrically connected to the plurality of second pad electrodes of the second substrate by the adhesive member.