Customer Bridge

Figure 1.  (a) Schematic image of the 64-element MTJ array. The 120 µm-diameter green spot is the biologically active area which contains all of the active MTJ sensors.  The pink area indicates the regions of photoresist which shield the reference arms of the Wheatstone bridge.  (b) Schematic of the surface treatment used for the MTJ biosensor array.  (c) Optical image of the 64-element MTJ biosensor device.  (d) A close-up view of the active arms of the array, each of which contains 16 MTJ sensors.

Published Applied Physics Letters 93, 033903 (2008).

“Quantitative detection of DNA labeled with magnetic nanoparticles using arrays of MgO-based magnetic tunnel junction sensors”, Weifeng Shen, Ben Schrag, Matthew Carter and Gang Xiao, Applied Physics Letters 93, 033903 (2008).