Patent ID: 11942434
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for manufacturing a semiconductor package, comprising:
preparing a back-side wiring substrate, wherein the back-side wiring substrate is a printed circuit board (PCB) comprising a core layer, a back-side via plug, a back-side wiring layer, and a back-side pad;
disposing connectors on the back-side pad and on a first surface of the back-side wiring substrate;
disposing a lower semiconductor chip between the connectors on the first surface of the back-side wiring substrate, wherein the lower semiconductor chip comprises a chip bump at an upper surface thereof;
providing an encapsulator on the first surface of the back-side wiring substrate, wherein the encapsulator is on side surfaces of the connectors and the lower semiconductor chip; and
forming a front-side redistribution layer on the encapsulator, on portions of the connectors that are exposed by the encapsulator, and on the chip bump,
wherein a coefficient of thermal expansion of the front-side redistribution layer is greater than a coefficient of thermal expansion of the back-side wiring substrate, and
wherein a modulus of elasticity of the back-side wiring substrate is greater than a modulus of elasticity of the front-side redistribution layer.