FLEX CONNECTOR SEATING VERIFICATION TECHNIOUE
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2002-Mar-13
Low or zero insertion force (LIF; ZIF) flex con- nectors are a very popular choice for interconnecting in portable devices because of their small size and high pin density. One drawback with these connec- tors; however, is that the insertion of the flex is an error prone, manual operation. The technique described below provides a means oftesting the qual- ity ofthe flex insertion. The approach consists ofan artwork pattern added to a vendor recommended pattern for a flexible circuit that is to interface to the vendor's connector. The two outer most contact patterns of the flexible circuit would be shortened an appropriate amount to ensure correct flex seat- ing in the event the flexiwas inserted unevenly. Two addition contacts may be required if existing pins cannot be multiplexed\ Figure 1 shows a typical application. Note the tyo outer traces (1 and 2) are shorter than the rest. As a flex is inserted into a connector (3) at an ahgle, if both sides are not installed correctly, one side will not make contact to one of the outer pins-in this case, trace (2). A cir- cuit configuration sirnil& to the one shown in Fig- ure One could highlight a problem by turning on a light emitting diode or other device during a testing sequence.