Abstract: Technologies for fiber array unit (FAU) lid designs are disclosed. In one embodiment, channels in the lid allow for suction to be applied to fibers that the lid covers, pulling the fibers into place in a V-groove. The suction can hold the fibers in place as the fiber array unit is mated with a photonic integrated circuit (PIC) die. Additionally or alternatively, channels can be on pitch, allowing for pulling the FAU towards a PIC die as well as sensing the position and alignment of the FAU to the PIC die. In another embodiment, a warpage amount of a PIC die is characterized, and a FAU lid with a similar warpage is fabricated, allowing for the FAU to position fibers correctly relative to waveguides in the PIC die. In another embodiment, a FAU has an extended lid, which can provide fiber protection as well as position and parallelism tolerance control.

Abstract: A battery is provided comprising a coated sintered cathode. The coated sintered cathode comprises at least one of lithium cobalt oxide (LiCoO2) or NMC (LiNi(1-x-y)MnxCoyO2). The coated sintered cathode also comprises a coating layer. The coating layer comprises at least one of aluminum oxide (Al2O3), aluminum fluoride (AlF3), zinc oxide (ZnO), magnesium oxide (MgO), titanium dioxide (TiO2), lanthanum oxide (La2O3), zirconium oxide (ZrO2), gallium oxide (Ga2O3), magnesium fluoride (MgF2), molybdenum trioxide (MoO3), selenium (Se), or phosphorous pentoxide (P2O5). The coating layer is coated on the sintered cathode by atomic layer deposition. The sintered cathode may form a cathode-electrolyte interface inside the battery, and the coating layer may be positioned at the cathode-electrolyte interface.