Importance

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Abstract

A test assembly adapted to test a semiconductor device is provided. The test assembly includes a main circuit board, a space transformer, a plurality of electrical connection elements, an intermediary stiffener, and a plurality of test probes. The space transformer is disposed on the main circuit board and has a first surface and a second surface opposite to the first surface. The first surface of the space transformer faces the main circuit board. The electrical connection elements are disposed between the main circuit board and the first surface of the space transformer. The space transformer is electrically connected to the main circuit board through the electrical connection elements. The intermediary stiffener is disposed between the main circuit and the first surface of the space transformer. The intermediary stiffener has a plurality of accommodating through holes. Each of the electrical connection elements is disposed in one of the accommodating through holes. The test probes are disposed on the second surface of the space transformer and electrically connected to the space transformer.

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First Claim