Patent ID: 11270922

Abstract:
A radio-frequency module 1a includes a wiring board 2, a first component 3a mounted on a lower surface 2a of the wiring board 2, a plurality of connection terminals 4, a first sealing resin layer 5 that covers the first component 3a and the connection terminals 4, a plurality of second components 3b mounted on an upper surface 2b of the wiring board 2, a second sealing resin layer 6 that covers the second components 3b, and a shield film 7. By adjusting surface roughness of a lower surface 5a of the first sealing resin layer 5, surface roughness of a lower surface 30a of the first component 3a, and surface roughness of a lower surface 4a of the connection terminal 4, it is possible to prevent abnormal deposition of plating and a crack in the first component 3a, and to prevent malfunction of the radio-frequency module 1a.