Patent ID: 7176560
Filing Date: 2007-02-13
Classification: H01L,H03K

Abstract:
1. A semiconductor device having a chip-on-chip structure wherein a first semiconductor chip having a circuit block where a plurality of inter-chip connection terminals and a plurality of external connection terminals are formed on a surface of the chip and a second semiconductor chip having a circuit block where a plurality of inter-chip connection terminals and a plurality of external connection terminals are formed on a surface of the chip are adhered to each other in a form wherein the surfaces of the chips are opposed to each other so that the inter-chip connection terminals of said first semiconductor chip and the inter-chip connection terminals of said second semiconductor chip are connected to each other, wherein said first semiconductor chip comprises a first multiplexer circuit for selecting an input signal line from among a plurality of input signal lines so as to output a signal from the selected input signal line to an output signal line, and the output signal line of said first multiplexer circuit is connected to an inter-chip connection terminal of said first semiconductor chip.