A fan-out stacked semiconductor package structure and a packaging method thereof are disclosed. The structure includes a three-dimensional memory chip package unit and a two-dimensional fan-out peripheral circuit chip SiP package unit. The three-dimensional memory chip package unit includes: at least two memory chips laminated in a stepped configuration; a first rewiring layer; wire bonding structures, each of which being electrically connected to the bonding pad and the first rewiring layer; a first encapsulating layer; and first metal bumps, formed on the first rewiring layer. The two-dimensional fan-out peripheral circuit chip SiP package unit includes: a second rewiring layer; at least one peripheral circuit chip; a third rewiring layer, bonded to the peripheral circuit chip; metal connection pillars; a second encapsulating layer, encapsulating the peripheral circuit chip and the metal connection pillars; and second metal bumps, formed on the second rewiring layer. The first metal bumps are bonded to the third rewiring layer.

One of the purposes of the present invention is to provide a thermosetting resin composition with excellent adhesion to metals. A thermosetting resin composition, comprising the following components (A) to (D): (A) a thermosetting resin; (B) a silane coupling agent represented by the following formula (I):

##STR00001##

wherein, in formula (I), R.sup.1 is, independently of each other, an alkyl group having 1 to 8 carbon atoms, m is an integer of 1 to 3, n is an integer of 0 to 10, Q is a single bond or an amide bond (NHCO), A is a nitrogen-containing heterocyclic group having at least two nitrogen atoms, wherein one of the nitrogen atoms is bonded to the carbon atom of (CH.sub.2).sub.n or of NHCO; (C) a curing accelerator; and (D) an inorganic filler.

The package-on-package (POP) structure includes a first package unit of three-dimensional fan-out memory chips and a SiP package unit of the two-dimensional fan-out peripheral circuit chip. The first package unit includes: memory chips laminated in a stepped configuration; a molded substrate; wire bonding structures; a first rewiring layer; a first encapsulating layer; and first metal bumps, formed on the first rewiring layer. The SiP package unit includes: a second rewiring layer; a peripheral circuit chip; a third rewiring layer, bonded to the circuit chip; first metal connection pillars; a second encapsulating layer for the circuit chip and the first metal connection pillars; and second metal bumps on the second rewiring layer. The first metal bumps are bonded to the third rewiring layer. Integrating the two package units into the POP is enabled by three rewiring layers and the molded substrate which supports the first package unit during wire bonding process.

An electronic device package includes a frame, an electronic device mounted to the frame, surface-mount leads, and a gel at least partially filling a cavity between the electronic device and the frame. The electronic device includes electronic circuitry provided on an electronic device substrate, and the surface-mount leads are electrically connected to the electronic circuitry and extend laterally and outwardly from an outer perimeter of the frame. The gel in the cavity covers the electronic circuitry.