Patent ID: 7326590

Claim:
A manufacturing method of forming a ball grid array package, the method comprising steps of: providing a substrate strip having a plurality of sub-substrate strips, wherein each of said sub-substrate strips has an upper surface and a lower surface, respectively; disposing a plurality of chips on the upper surfaces, wherein each of said upper surfaces has at least one of the chips formed thereon; and forming a plurality of encapsulation bodies and a plurality of discrete strengthening ribs located between each of the encapsulation bodies on the upper surfaces, wherein the encapsulation bodies encapsulate the chips and the strengthening ribs connect opposing sides of adjacent encapsulation bodies, a gap exists between adjacent strengthening ribs to expose the sub-substrate strip, and the thickness of the strengthening ribs is larger than the thickness of the encapsulation body to which the strengthening ribs connect; wherein at least one rib is connected to a plurality of encapsulation bodies on a same side.