Patent ID: 7396701
Filing Date: 2008-07-08
Classification: H01L,H05K,Y10T

Abstract:
1. A manufacturing method of an electronic device having a power amplifier circuit, comprising the steps of: (a) preparing a first wiring board formed of resin; (b) placing an active component over a first substrate-side terminal formed over a first face of the first wiring board through first solder containing lead; (c) placing a passive component over a second substrate-side terminal formed over the first face of the first wiring board through second solder containing no lead; (d) melting the first solder at a first temperature to connect the active component to the first wiring board and melting the second solder at a second temperature to connect the passive component to the first wiring board; (e) sealing the active component and the passive component with resin under reduced pressure; (f) preparing a second wiring board; (g) placing the first wiring board mounted with the active component and the passive component over a first face of the second wiring board through third solder; and (h) melting the third solder at a third temperature to connect the first wiring board to the second wiring board, and wherein the second temperature is lower than the first temperature.