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Hitting the performance, cost and yield targets for microLED displays that can be used in augmented reality headsets poses formidable challenges. Here we discuss some of those issues and report on the progress of MICLEDI 300mm manufacturing platform. [ABSTRACT FROM AUTHOR]

Electrode grids are used in neuroscience research and clinical practice to record electrical activity from the surface of the brain. However, existing passive electrocorticography (ECoG) technologies are unable to offer both high spatial resolution and wide cortical coverage, while ensuring a compact acquisition system. The electrode count and density are restricted by the fact that each electrode must be individually wired. This work presents an active micro‐electrocorticography (µECoG) implant that tackles this limitation by incorporating metal oxide thin‐film transistors (TFTs) into a flexible electrode array, allowing to address multiple electrodes through a single shared readout line. By combining the array with an incremental‐ΔΣ readout integrated circuit (ROIC), the system is capable of recording from up to 256 electrodes virtually simultaneously, thanks to the implemented 16:1 time‐division multiplexing scheme, offering lower noise levels than existing active µECoG arrays. In vivo validation is demonstrated acutely in mice by recording spontaneous activity and somatosensory evoked potentials over a cortical surface of ≈8×8 mm2. The proposed neural interface overcomes the wiring bottleneck limiting ECoG arrays, holding promise as a powerful tool for improved mapping of the cerebral cortex and as an enabling technology for future brain‐machine interfaces. [ABSTRACT FROM AUTHOR]

In this paper, we discuss microLED display yield and manufacturing challenges related to the CMOS integration as well as epi‐defectivity. Based on those considerations, we show the MICLEDI approach how to address them in a 300mm foundry compatible integration flow. [ABSTRACT FROM AUTHOR]