Patent ID: 7312523
Filing Date: 2007-12-25
Classification: H01L,H05K

Abstract:
1. A circuit board comprising: a laminate core substrate: a resin-filled plated (RFP) through-hole having an upper surface planar to an upper surface of said laminate core substrate; a metal layer encircling and contacting said RFP through-hole; a dielectric layer over said RFP through-hole and contacting said laminate core substrate; a substantially circular RFP cap in said dielectric layer and connected to said metal layer and an upper opening of said RFP through-hole, wherein said RFP cap comprises a diameter of at least 300 μm; a via stack in said dielectric layer, wherein said via stack is positioned over a substantially central portion of said RFP through-hole and said RFP cap; a plurality of circular via lands extending radially outward from said via stack, wherein each of said plurality of circular via lands comprise an equivalent diameter and are aligned over a substantially central portion of said RFP through-hole and said RFP cap, and wherein a diameter of each of said plurality of circular via lands exceeds a diameter of each of said RFP through-hole and said RFP cap; and a ball grid away pad connected to said via stack, wherein said ball grid array pad is positioned over a substantially central portion of said RFP through-hole and over a substantially central portion of said via stack, and wherein said ball grid array pad is diametrically larger than each of said plurality of via lands and said RFP cap.