Patent ID: 8895380

Claim:
A method of making a semiconductor assembly, comprising: providing a dielectric layer and a supporting board that includes a sacrificial carrier, a stiffener and an adhesive, wherein (i) the sacrificial carrier includes a bump and a flange, (ii) the bump is adjacent to and integral with the flange and extends from the flange in a first vertical direction, (iii) the flange extends laterally from the bump in lateral directions orthogonal to the first vertical direction, (iv) the stiffener is attached to the sacrificial carrier via the adhesive between the stiffener and the flange and between the stiffener and the bump, and (v) the dielectric layer covers the supporting board in the first vertical direction; removing the bump and a portion of the flange adjacent to the bump to form a cavity and expose the dielectric layer from a closed end of the cavity, wherein the cavity is laterally covered and surrounded by the adhesive and faces in a second vertical direction opposite the first vertical direction; mounting a semiconductor device into the cavity, wherein the semiconductor device includes an active surface with a contact pad thereon that faces the first vertical direction and an inactive surface that faces the second vertical direction; and forming a first build-up circuitry that covers the semiconductor device and the supporting board in the first vertical direction and includes a first conductive via that directly contacts the contact pad of the semiconductor device to provide an electrical connection between the semiconductor device and the first build-up circuitry.