Sensor Unit Substrate Positioning for Magnetic Scales

A substrate is introduced as an intermediary component between the detector structure and the circuit board. The substrate serves as a mounting carrier that provides precise positioning features (protruding partial surface and end face) for aligning the detector structure with the housing, while also enabling electrical connection through vias. This mediator resolves the contradiction by decoupling the positioning function from the circuit board, allowing the circuit board to focus on electrical functions while the substrate handles mechanical positioning.

The substrate is designed to perform multiple functions simultaneously: it serves as a mechanical support for the detector structure, provides positioning features (protruding partial surface and end face) for alignment with the housing, enables electrical connection through integrated vias, and acts as a mounting interface for the circuit board. By consolidating these multiple functions into a single component, the design achieves high positioning precision without proportionally increasing manufacturing complexity, as the positioning features are integrated into the substrate's basic structure rather than being separate additions.

The mounting structure is segmented into distinct functional elements: the substrate with its positioning features (protruding partial surface and end face), the housing with corresponding recesses, and the circuit board. This segmentation allows the detector structure to be precisely positioned through the geometric fit of the positioning features, while the overall assembly can still be disassembled by removing the substrate from the housing recesses. The segmentation enables independent optimization of positioning stability and assembly ease without requiring rigid fixation of the entire detector structure to the housing.