George A. Sai-Halasz, Matthew R. Wordeman, et al.
IEEE Electron Device Letters
A global clock distribution technique for 3D stacked chips where the clock tree and grid are shorted between strata is presented and compared with a DLL-based technique. Both permit at-speed testing of the strata before and after stack assembly. The shorting-based technique is implemented in a 2-strata eDRAM test chip using an IBM 45nm SOI 3D technology. Operation above 2.5GHz is measured. © 2012 IEEE.
George A. Sai-Halasz, Matthew R. Wordeman, et al.
IEEE Electron Device Letters
Steven J. Koester, Albert M. Young, et al.
IBM J. Res. Dev
Toshiaki Kirihata, Hing Wong, et al.
IEEE Journal of Solid-State Circuits
Hu H. Chao, Robert H. Dennard, et al.
IEEE Journal of Solid-State Circuits