Patent ID: 11927604
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A method of manufacturing a packaged electronic device, the method comprising:
fabricating circuits on or in respective test sites of a wafer;
wafer probe testing the test sites of the wafer, including:
initializing a wafer probe test system to test the wafer that is positioned in a wafer plane of orthogonal first and second directions, including:
measuring a probe needle height along a third direction that is orthogonal to the first and second directions, and
using a magnetic sensor of the wafer probe test system, measuring a magnetic field of a rotary magnet rotating about an axis along the third direction at different rotational angles; and

while the rotary magnet rotates, testing magnetic sensing performance of the circuits of the respective test sites of the wafer according to a model of magnetic flux density in the first, second and third directions at the respective test sites of the wafer as a function of the rotational angle of the rotary magnet, the probe needle height and the measured magnetic flux density of the magnetic sensor;

separating the respective test sites from one another to provide separated semiconductor dies; and
packaging at least some of the separated semiconductor dies to form packaged electronic devices.