Pulse type layer-ID detector for 3D-IC and method of the same

摘要

A 3D-IC detector for each layer of a stacked device comprises a pulse generator to receive an initial signal and generate a pulse-in signal to a next stage detector. A latch is coupled to the pulse generator to receive an output signal from the pulse generator and generate a layer identifying signal. A counter is coupled to previous stage detector and the initial signal to perform a counting operation; and an adder coupled to the counter to add a number to a counting output from the counter and input added signal to the pulse generator.

主权项

1. A 3D-IC detector for each layer of a stacked device, a current stage detector located in one layer of said stacked device, comprising:
a pulse generator to receive an initial signal and generate a pulse-in signal to a next stage detector; a latch coupled to said pulse generator to receive an output signal from said pulse generator and generate a layer identifying signal; a counter coupled to previous stage detector and said initial signal to perform a counting operation; and an adder coupled to said counter to add a number to a counting output from said counter and input added signal to said pulse generator, wherein said current stage detector, said next stage detector and previous stage detector are located at different layer of said stacked device.