Receiving Protocol
Structured inspection of delivered raw materials, sensor chips, and passive components before production integration prevents defective parts from reaching assembly lines. Performing incoming quality inspection ensures that incoming sensing elements conform to purchase order specifications and published datasheets. The receiving verification boundary applies exclusively to delivered goods before their release into active manufacturing inventory.
Quality personnel check physical packaging, anti-static handling integrity, and accompanying certificates of conformance.
Defect Screening
Visual inspection and dimensional verification catch physical package deformities, cracked ceramic substrates, and lead oxidation. Solderability testing verifies that pin metallization supports reliable surface-mount attachment without forming micro-cracks. Electrical screening measures basic static parameters such as DC resistance, pin capacitance, and diode forward voltage drops.
Non-conforming lots are quarantined immediately to prevent contamination of the production floor.
Metrological Verification
Sensor element lots undergo sample-based parametric testing against reference calibration standards before factory line clearance. Technicians mount sample pressure transducers or thermal sensors into precision test fixtures to verify zero-point offset and span response. Uncompensated drift or out-of-spec offset values indicate fabrication batch instability at the silicon wafer level.
Finding parametric shifts during receiving prevents costly post-assembly rework and recalibration.
Lot Acceptance
Quality assurance criteria follow statistical sampling plans defined by ISO standards to determine batch release or rejection. Rejection of a sample lot triggers formal supplier corrective action requests and forces full inventory containment. Production scheduling relies on verified component acceptance.
