Coreless substrate and manufacturing method thereof

摘要

The present invention discloses a method for manufacturing a coreless substrate. The method comprises the steps of (a) forming an insulating layer on one side of a metal sheet; (b) forming a via hole on the insulating layer for electrical connection between the metal sheet and the other side; and (c) forming a plurality of protruded function pads by etching the metal sheet. The coreless substrate and manufacturing method thereof in accordance with the present invention have the signal delivery characteristic that is improved by eliminating the inner via hole.