Patent ID: 11955396
Assignee: YIBU SEMICONDUCTOR CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A semiconductor packaging method, comprising:
providing a set of semiconductor devices and a carrier board, the set of semiconductor devices having respective active surfaces and opposing passive surfaces, connection terminals formed on the active surfaces, and first alignment solder parts formed on the passive surfaces, the carrier board having second alignment solder parts respectively corresponding to the first alignment solder parts;
placing the set of semiconductor devices on the carrier board such that the first alignment solder parts contact respective ones of the second alignment solder parts;
forming alignment solder joints by soldering the first alignment solder parts to respective ones of the second alignment solder parts whereby the set of semiconductor devices are aligned and fixed to the carrier board;
encapsulating the set of semiconductor device using a molding compound to form a molded package body on a side of the carrier board where the set of semiconductor device are disposed;
exposing the connection terminals from the molded package body; and
sequentially forming an interconnection layer and external terminals on a side of the molded package body where the connection terminals are exposed, wherein the connection terminals are electrically connected to the external terminals through the interconnection layer;
wherein one of a respective first alignment solder part and a corresponding second alignment solder part is a solder bump, and the other of the respective first alignment solder part and the corresponding second alignment solder part is a solder pad or a solder bump;
wherein at least the first or second alignment solder bumps are made of solder, and soldering is performed by melting the solder;
wherein viscous flux is pre-coated on the first alignment solder parts and/or the second alignment-solder parts, and the method further comprises: before the soldering is performed, turning the at least one semiconductor device together with the carrier board over as a whole so that the active surfaces of the set of semiconductor devices are downward faced; and
wherein the alignment solder joints are formed when the active surfaces of the set of semiconductor devices face downward to allow weight of each respective semiconductor device of the set of semiconductor devices elongates corresponding alignment solder joints during soldering, causing the respective semiconductor device to be further aligned to the carrier board.