Capacitively coupled connector for flexible printed circuit applications
A FPC connector has an insulative housing with a general U-shape that defines an opening that receives a free end of a length of FPC. The housing has a base and two leg portions and the leg portions have engagement arms that hold engage the FPC free end when inserted into the connector housing opening. A cover of the connector housing has press members that press the FPC and dielectric barriers thereon into contact with contacts on a circuit board.
1. A connector assembly for providing a capacitively coupled connection between a plurality of conductive traces on a free end of a length of flexible printed circuitry (“FPC”) and a plurality of planar contacts disposed on a circuit board, the assembly comprising:
a housing, the housing including a base, two side walls and a cover, each of the base, the two side walls and the cover cooperatively define an interior receptacle in the housing that encloses contact pads associated with the conductive traces; and
a length of FPC having a free end, the free end including a plurality of conductive planar contact surfaces disposed on one surface thereof and a stiffener disposed on the opposite surface, the side edges of the FPC having a pair of notches formed therein, the FPC including a dielectric barrier disposed on the conductive planar contact surfaces to provide a non-conductive member interposed between the conductive planar contact surfaces and opposing conductive traces of the circuit board;
wherein:
the housing further includes a pair of engagement arms for engaging the notches to hold the free end in place within the interior receptacle; and
the cover includes means for exerting pressure on the FPC free end to force the dielectric barriers into contact with the contact pads.
2. The connector assembly of claim 1 , wherein the pressure exerting means includes a plurality of press members disposed on an interior surface of the cover.
3. The connector assembly of claim 2 , wherein the press members are spaced apart widthwise on the interior surface of the cover.
4. The connector assembly of claim 2 , wherein the press members include ramps, disposed on the interior surface of the cover, which extend lengthwise within the interior receptacle.
5. The connector assembly of claim 2 , wherein the press members extend along the entire exposed interior surface of the cover.
6. The connector assembly of claim 1 , wherein the housing further includes a pair of sidewalls flanking the interior receptacle.
7. The connector assembly of claim 6 , wherein the engagement arms are disposed on the sidewalls.
8. The connector assembly of claim 1 , wherein the engagement arms are bent back upon themselves to provide a spring force thereto.
9. The connector assembly of claim 8 , wherein the engagement arms have a general U-shape.
10. The connector assembly of claim 1 , wherein the engagement arms are cantilevered with enlarged head portions.
11. The connector assembly of claim 1 , wherein the dielectric barrier includes a ceramic layer.
12. The connector assembly of claim 7 , wherein the engagement arms extend at least partially into the interior receptacle.