Flex on board anisotropic conductive adhesive interconnection
An apparatus includes a printed circuit board and a flexible printed circuit. A rigid structure component is on a first side of the printed circuit board. An interconnection interface is on a second side of the printed circuit board opposite to the rigid structure component and is configured to interconnect the flexible printed circuit and the printed circuit board. A conductive interconnection material is at the interconnection interface between the flexible printed circuit and the printed circuit board.
1. An apparatus comprising:
a printed circuit board;
a flexible printed circuit;
a rigid structure component on a first side of the printed circuit board;
an interconnection interface on a second side of the printed circuit board opposite to the rigid structure component, and configured to interconnect the flexible printed circuit and the printed circuit board; and
a conductive interconnection material at the interconnection interface between the flexible printed circuit and the printed circuit board,
wherein
the first interconnection terminal comprises a plurality of adjacent first bond pads and the second interconnection terminal comprises a plurality of adjacent second bond pads, and
in a connected state of the flexible printed circuit and the printed circuit board, a channel is formed between a pair of adjacent first bond pads of the first terminal and a corresponding second bond pad of the second terminal.
2. The apparatus according to claim 1 , wherein the conductive interconnection material is an anisotropic conductive adhesive.
3. The apparatus according to claim 1 , wherein the conductive interconnection material has a maximum of 4 Megapascal (MPa) bonding pressure to achieve interconnection.
4. The apparatus according to claim 1 , wherein
the interconnection interface comprises a first interconnection terminal and a second interconnection terminal,
the first interconnection terminal is on one of the flexible printed circuit or the printed circuit board, and the second interconnection terminal is on the other one of the flexible printed circuit or the printed circuit board, and
the conductive interconnection material is between the first interconnection terminal and the second interconnection terminal.
5. The apparatus according to claim 1 , wherein a shape of the rigid structure component is irregular and a shape of a support block corresponds with the irregular shape of the rigid structure component.
6. The apparatus according to claim 1 , wherein the interconnection interface is positioned on the second side of the printed circuit board in an area that corresponds to a central region of the rigid structure component on the first side of the printed circuit board.
7. The apparatus according to claim 1 , wherein a first pitch of a first pitch pattern of the plurality of adjacent first bond pads of the first interconnection terminal is constant and a second pitch of a second pitch pattern of the plurality of adjacent second bond pads of the second interconnection terminal is varied.
8. The apparatus according to claim 1 , wherein at least two adjacent first bond pads of the first interconnection terminal form multiple adjoined fingers that in the connected state overlap and connect to one second bond pad of the second interconnection terminal.
9. The apparatus according to claim 1 , wherein the first interconnection terminal comprises a first set of the plurality of adjacent first bond pads and a second set of the plurality of adjacent first bond pads, wherein a width (W 1 ) of a first bond pad in the first set is greater than a width (W 2 ) of a first bond pad in the second set.
10. The apparatus according to claim 9 , wherein the first set of the plurality of first adjacent bond pads is configured to be connected to one second bond pad of the second interconnection terminal in the connected state.
11. The apparatus according to claim 1 , further comprising:
a bonding support block on a side of the rigid support component opposite to the printed circuit board.
12. A device comprising an apparatus according to claim 1 .
13. The apparatus according to claim 1 , wherein the printed circuit board is between the flexible printed circuit and the rigid structure component.
14. The apparatus according to claim 1 , further comprising:
one or more electrical components on the first side of the printed circuit board within the rigid structure component.
15. The apparatus according to claim 14 , wherein the rigid structure component is a radio frequency shield.
16. The apparatus according to claim 15 , wherein the radio frequency shield has a stepped shape and a shape of a support block corresponds with the stepped shape of the radio frequency shield.
17. An interconnection interface for bonding a flexible printed circuit to a printed circuit board, the interconnection interface comprising:
a first interconnection terminal with a plurality of adjacent first bond pads;
a second interconnection terminal with a plurality of adjacent second bond pads, wherein the first interconnection terminal and the second interconnection terminal are configured to be pressed together in a connected state of the flexible printed circuit and the printed circuit board; and in the connected state of the flexible printed circuit and the printed circuit board, a channel is formed between a pair of the plurality of adjacent first bond pads of the first interconnecting terminal and a corresponding second bond pad of the plurality of adjacent second bond pads of the second interconnection terminal.
18. The interconnection interface according to claim 17 , comprising a conductive interconnecting material between the first interconnection terminal and the second interconnection terminal.