Patent ID: 11973014
Assignee: SILICONWARE PRECISION INDUSTRIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A method for manufacturing a substrate structure, comprising:
providing a substrate body and a plurality of electrical contact pads having planar structures directly contacting a topmost surface of the substrate body, wherein at least one of the electrical contact pads directly contacting the substrate body has at least one concave portion formed inside a periphery of the at least one of the electrical contact pads; and
forming an insulating protection layer on the substrate body to directly contact the electrical contact pads, and forming a filling material in the at least one concave portion, wherein the insulating protection layer includes a plurality of openings to expose the electrical contact pads directly contacting the substrate body, and at least one hole formed on the insulating protection layer to extend into at least one of the electrical contact pads directly contacting the substrate body to form the at least one concave portion inside a periphery of the electrical contact pad, wherein the filling material is located outside the plurality of openings.