| 摘要 |
A testing mechanism for testing magnetically operated microelectromechanical system (MEMS) switches at a wafer level stage of manufacture includes an electromagnetic fixture configured to be received in a standard probe ring. The electromagnetic fixture is rotatable, relative to the probe ring, to permit adjustment of orientation of a generated magnetic field relative to the MEMS devices of a subject wafer. The testing mechanism also includes a probe card with probes positioned to contact test pads on the subject wafer. During operation, the probe card is positioned over the wafer to be tested, with the test probes in electrical contact with respective contact pads of the wafer, and the electromagnetic fixture is positioned above the probe card. An electrical potential is applied across the switches on the subject wafer, and the electromagnetic fixture is energized at selected levels of power and duration. Current flow across each switch is measured to determine one or more of: open circuit contact resistance, closed circuit contact resistance, response time, response to switching magnetic field, frequency response, current capacity, critical dimensions, critical angles of magnetic field orientation, etc. Wafer level testing enables rejection of non-compliant switches before the cutting and packaging levels of manufacture.
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