Patent ID: 8051558
Filing Date: 2011-11-08
Classification: H05K,Y10T

Abstract:
1. A manufacturing method of the embedded passive device, for embedding the embedded passive devices in the printed circuit board, comprising: providing a substrate, a thin copper layer formed on the substrate, and the thin copper layer is able to conduct electroplating current; forming a patterned photoresist layer on the thin copper layer of the substrate; the patterned photoresist layer defining a source electrode and a ground electrode in the passive device, and the source electrode and the ground electrode both belonging to the same level and including a plurality of source branches and ground branches connected to the source electrode and the ground electrode, respectively; using the patterned photoresist layer, performing electroplating on the thin copper layer to form the source electrode and the ground electrode; removing the patterned photoresist layer; and filling a dielectric layer made of high-k dielectric material on the thin copper layer inside the gap between the source branches and the ground branches, wherein the source branches and the ground branches are separated by a predetermined gap, and the source branches and the ground branches both have a predetermined depth and a predetermined width.