Patent ID: 9735118
Date: 2017-08-15
CPC Classifications: H01L

Claim:
1. A method comprising: forming a first metal plate; forming a metal ring aligned to peripheral regions of the first metal plate; placing a device die level with the metal ring; encapsulating the device die and the metal ring in an encapsulating material; filling a dielectric material into a space encircled by the metal ring; forming a second metal plate covering the dielectric material and the metal ring, with a first opening formed in the second metal plate; and forming a first plurality of redistribution lines, with a first one of the redistribution lines overlapping a portion of the first opening, wherein the first metal plate, the metal ring, the second metal plate, and the dielectric material in combination form a passive device selected from an antenna and a waveguide, and wherein the first one of the redistribution lines forms a signal-coupling line of the passive device.