Patent ID: 6492737
Filing Date: 2002-12-10
Classification: H01L

Abstract:
An electronic device comprising:a first semiconductor chip having a plurality of first electrode pads arranged at a first array pitch on one main surface of the chip; a second semiconductor chip having a plurality of second electrode pads arranged at a second array pitch smaller than the first array pitch on one main surface of the chip; a wiring board having in a first area of a surface thereof a plurality of first connection parts arranged correspondingly to the plural first electrode pads and in a second area of said surface thereof different from the first area a plurality of second connection parts arranged correspondingly to the plural second electrode pads; a plurality of first salient electrodes disposed respectively between the first electrode pads and the first connection parts and providing electric connections between the two; and a plurality of second salient electrodes disposed respectively between the second electrode pads and the second connection parts and providing electric connections between the two; the plural first connection parts and the plural second connection parts being disposed at a deeper position than one main surface of the wiring board in a depth direction from said one main surface of the wiring board, and the plural second salient electrodes being of a multi-stage bump structure having a larger number of stages than the plural first salient electrodes.