US Patent 10157888 Integrated fan-out packages and methods of forming the same

Integrated fan-out packages and methods of forming the same are disclosed. An integrated fan-out package includes a first chip, a redistribution layer structure, a plurality of connection pads, a plurality of dummy patterns, a plurality of micro-bumps, a second chip and an underfill layer. The redistribution layer structure is electrically connected to the first chip. The connection pads are electrically connected to the redistribution layer structure. The dummy patterns are at one side of the connection pads. The micro-bumps are electrically connected to the connection pads. The second chip is electrically connected to the micro-bumps. The underfill layer covers the plurality of dummy patterns and surrounds the micro-bumps.