Encapsulation method and leadframe for leadless semiconductor packages
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Referring to FIG. 4, according to the invention, a leadframe 4 for leadless semiconductor packages comprises a plurality of cavities 41, 42, 43, 44, 45, 51, 52, 53, 54, 55 and a plurality of inter-cavity longitudinal gates 46, 47, 48, 49, 56, 57, 58, 59. Each cavity has a die pad (not shown in the figure) for supporting a die. Die 411 is, for example, attached to its die pad in cavity 41. Each cavity has a plurality of conducting portions for electrical connection to the die on the die pad. For example, the cavity 41 has three conducting portions 412, 413 and 414. In the embodiment of the invention illustrated in FIG. 4, each cavity has one die pad for supporting a die. To improve the efficiency, each cavity can have a plurality of die pads for supporting a plurality of dice.
The cavities are arranged in a matrix configuration, and are classified into a plurality of columns and a plurality of rows. For example, the cavities 41, 42, 43, 44 and 45 form a first column, and the cavities 51,
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