1. Purpose of the gate
Qualification start confirms that parts and modules built on the intended production flow enter reliability qualification with an approved plan. The plan follows the chosen standard and adds RF-specific stresses, such as operating life at high output power, mismatch ruggedness and drift of RF parameters over stress.
Sample sizes, lot counts and conditions follow the chosen standard, such as JEDEC methods, AEC-Q100 for chips or AEC-Q104 for modules in vehicles, with any customer additions. RF parameters are measured before and after each stress with the same method and fixtures, so a drift can be told apart from a measurement change. Failure analysis capacity is booked ahead, because a failure late in a stress test can delay the production release if analysis has to wait.
The gate also confirms traceability. Each qualification unit is traceable to its wafer, substrate and assembly lot and to its configuration, so a failure can be related to a cause and a result can be reused when a later change is assessed against the qualification baseline.
Customers often ask to see the plan before qualification starts, particularly in automotive and infrastructure markets. Agreeing it with them at this gate avoids a second qualification later because a stress, a condition or a sample size did not match what a customer expected.
Where a qualification result from an earlier product or a family member is to be reused, the gate checks the basis for it: the same technology, process, package and stress conditions, or differences small enough to be covered by a reduced plan. The reasoning is recorded so that customers and auditors can follow it.
The gate sits at the start of the stage Qualification & Production Test and belongs to the RF engineering track. In one line: Parts and modules built on the intended production flow enter reliability qualification.
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