Acids, the manufacturing basically is controlling the etching process to get rid of unwanted parts and keep the designed metal circuits. When you lost power, y

Acids, the manufacturing basically is controlling the etching process to get rid of unwanted parts and keep the designed metal circuits. When you lost power, you are not sure if the chips stayed with acids for too long or too short, or coated with unwanted amount of materials, the uncertainty kills the yield rate, which can be already low since memory chips require repeated stacking nowadays. Similar to https://i.stack.imgur.com/yTQqw.jpg https://i.stack.imgur.com/yTQqw.jpg