Bubble memory is a non-volatile computer memory technology from the 1970s–80s that stored bits as magnetized domains (bubbles) in thin magnetic garnet films, moved by rotating magnetic fields. Developed largely by Andrew Bobeck at Bell Labs, it initially promised to replace core memory, tapes, and disks due to its non-moving nature and high density. However, rapid advances in semiconductor DRAM and hard disk technology made it uncompetitive. It found niche use in shock-resistant and high-vibration environments until flash storage rendered it obsolete by the late 1980s. The article covers its physics, materials (garnet films, GGG substrates), device architecture (major-minor loop design), commercialization timeline, and real-world applications including Konami's arcade Bubble System and early laptops.
