| 摘要 |
PURPOSE:To increase the numbers of external leads markedly for lessening the danger of solders between adjoining external leads coming into contact with one another by a method wherein the external leads are alternately projected from the sides and either from surface or bottom of a package. CONSTITUTION:The external side leads 5 and the external bottom leads 6 respectively projecting from sides and bottom of a sealed resin are alternately arranged. Assuming the pitch of external leads 6 and the individual pitch of leads 5 and 6 to be a and b, said pitches are arrangd to be a = 1/2 X b. In such a constitution, the members of external leads 5 and 6 can be markedly increased so that the danger of solders between adjoining lead 5 and 6 coming into contact with one another may be lessened. |
