Patent ID: 10157870

Abstract:
A method of fabricating an integrated fan-out package is described. The method includes the following steps. A carrier is provided. Through insulator vias are formed on the carrier, and at least one semiconductor die is provided on the carrier. The semiconductor die is attached to the carrier through a die attach film. An insulating encapsulant having a first region and a second region is formed on the carrier. The insulating encapsulant in the first region is encapsulating the semiconductor die, and the insulating encapsulant in the second region is encapsulating the plurality of through insulator vias. The carrier is debonded, and a trimming process is performed to remove portions of the insulating encapsulant in the second region, and a trench is formed in the insulating encapsulant in the second region. A plurality of conductive balls is disposed on the insulating encapsulant in the second region. The plurality of conductive balls surround the first region of the insulating encapsulant and the die attach film, and is electrically connected to the plurality of through insulator vias.