Patent ID: 9741589
Date: 2017-08-22
CPC Classifications: H01L,H05K,Y10T

Claim:
1. A structure comprising: a plurality of top pads protruding over a top surface of a package substrate, wherein at least one top pad comprises a first half-circle portion, a second half-circle portion and a first rectangular portion between the first half-circle portion and the second half-circle portion, wherein a length of the first rectangular portion is greater than a radius of the first half-circle portion, and wherein a sidewall of the at least one top pad is formed by a sidewall of the first half-circle portion, sidewalls of the first rectangular portion and a sidewall of the second half-circle portion; a plurality of bottom pads embedded in the package substrate, wherein at least one bottom pad comprises a third half-circle portion, a fourth half-circle portion and a second rectangular portion between the third half-circle portion and the fourth half-circle portion; and a plurality of vias coupled between the top pads and their respective bottom pads, wherein a longest axis of a first top pad is in a first direction, and a longest axis of a corresponding bottom pad is in a second direction different from the first direction.