A Petabyte in the Palm of My Hand - Kioxia Factory Tour

Quick Overview

Kioxia manufactures incredibly dense 3D NAND flash memory chips using advanced processes like Plasma Enhanced Chemical Vapor Deposition (PECVD) and CMOS Directly Bonded to Array (CBA) technology, culminating in a single wafer containing 8TB memory devices, which are then precisely diced and assembled using automated, ultra-clean manufacturing lines protected by seismic dampening foundations.

Key Points: The video tours Kioxia's advanced semiconductor fabrication facilities, showcasing the production of high-density 3D NAND flash memory devices. Kioxia utilizes 32 stacked 2TB QLC dies, bonded using CBA technology, to achieve massive storage capacities like 8TB on a single memory device. The fabrication process relies on extremely clean environments (Class 1000/Sub-Fab) where air is filtered top-down, and waste gases are managed using specialized scrubbers. The 300mm silicon wafers, which cost a hectare of land in value, undergo complex processes including PECVD for layering and laser etching for marking individual dies. The assembly process uses incredibly small gold wires (thinner than a human hair) for bonding, and tiny solder balls (0.03mm) for connecting the stacked dies to the substrate. The facility is protected by seismic isolation bearings underneath the building, allowing the structure to move up to 60cm horizontally during an earthquake. The overall manufacturing process prioritizes extreme precision and cleanliness, using automated equipment for tasks like solder paste application and visual inspection to ensure high quality and yield.

Context: This video provides an in-depth, sponsored tour of a Kioxia semiconductor fabrication plant in Japan, focusing on the advanced technology required to produce their high-density BiCS FLASH 8th generation 3D NAND memory chips. The host, Linus Sebastian, contrasts the complexity of flash memory manufacturing with everyday items and highlights Kioxia's engineering solutions for achieving unprecedented storage density and environmental sustainability, such as massive solar panel arrays and seismic isolation systems.