Importance

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Abstract

In a preferred embodiment, a semiconductor assembly board with back-to-back embedded devices and built-in stoppers includes an intermediate layer, a first stopper, a first semiconductor device, a first core layer, a second stopper, a second semiconductor device, a second core layer, a first build-up circuitry, a second build-up circuitry and a plated through hole. The first and second semiconductor devices are mounted on opposite surfaces of the intermediate layer using the first and second stoppers as placement guides that are laterally aligned with peripheral edges of the first and second semiconductor devices. The first and second core layers laterally cover the first and second semiconductor devices. The first and second build-up circuitries cover the semiconductor devices and the core layers in the opposite vertical directions and provide signal routing for the first and second semiconductor devices.

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First Claim