Component carriers replace flex printed circuit boards in linear measuring systems

The component carrier serves as a connecting element between a printed circuit board (PCB) and electronic components (such as LEDs, ICs, photo–diodes or sensors).

Component carriers are equipped with measuring sensors for detecting position

The measuring sensors of a scanning head for position detection, for example on a slide with guide rails, are often mounted onto flex PCBs. As magnetic, optical or inductive systems, they record the exact position of the slide. The sensors must be positioned exactly at a 90 degree angle. The capability to mount these as precisely as possible improves the accuracy of the measurement results. A second sensor is often installed in the measuring head for redundancy. In addition, the status of the evaluation electronics is displayed using LEDs; these are mounted onto a flex PCB.
HARTING's component carrier can completely replace the flex PCBs. The injection-moulded plastic body already provides very precise 90-degree angles for mounting sensors. The component carrier eliminates the need for time-consuming manual assembly of the flex PCB. In addition, the sensors are positioned more precisely. Another advantage of the component carrier is that the width of the sensor modules can be further reduced to less than 8 mm.
The component carrier with the mounted electronic components is delivered in a blister pack for further processing in SMD assembly facilities. The soldered components are also secured with an adhesive so that they cannot detach from their position while in the reflow oven.

Two sensors for detecting the position of a linear slide // Elimination of flex PCBs to implement a 90° angle between the IC and PCB (A) // Status LEDs integrated on a small component carrier (B) // Simplification of assembly