Packaging substrate structure and manufacturing method thereof

Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement

Reexamination Certificate

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C029S852000, C361S748000

Reexamination Certificate

active

08058566

ABSTRACT:
A packaging substrate structure includes a dielectric layer with a plurality of dielectric pillars disposed on a portion of a large-dimension opening area of the dielectric layer; and a first circuit layer with a plurality of first circuits disposed on a portion of the dielectric layer, and a conductive block disposed in the large-dimension opening area of the dielectric layer having the dielectric pillars. The dielectric pillars reduce the difference of the electrical current density distribution between the large-dimension opening area and small-dimension opening areas during electroplating, thereby overcoming the conventional drawback of insufficient thickness or a hollow center of the conductive block that results in an uneven thickness of the circuit layer. The invention further provides a method of manufacturing the packaging substrate structure.

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