In this study, we investigated how to fabricate flexible silicon memory using thinned die. Thinning of silicon wafers has become common practice in the packaging industry for use in stacked die packages. Wafer thinning is also being used in the development of 3-D wafer stacking. this technology can also include building very thin and flexible electronics. Silicon wafer thinned to 30 ㎛ and less is flexible allowing the fabrication of flexible and conformable electronics. thus, we would like to suggest how to fabricate flexible silicon memory by using this technology. A key for achieving these techniques is the thinning of wafer to a thickness of 30 ㎛ or thinner, the handling of thinned die and the electrical interconnection between thinned die and flexible substrate.