484 Series SQUID (IMAGE) American Institute of Physics Caption This image shows an optical micro-picture of a small part of a 484 series SQUID array showing 54 SQUIDs and a high resolution picture showing only 11 SQUIDs. The array is fabricated by optical lithography after depositing a YBa2Cu3O7 thin film on a SrTiO3 bicrystal. Each SQUID consists of two Josephson junctions connected in parallel. The Josephson junctions (schematically represented as red crosses) can be seen as 3 micron-wide narrow bridges crossing the bicrystal boundary shown with a dotted line. Each pair of successive SQUIDs is connected in series via inductive large area narrow flux-focusers (one is highlighted with a red U-shape). The flux inside each SQUID hole is quantized. Flux coherency in the array is reached when each SQUID hole is penetrated by the same number of integers of flux quanta. Credit Boris Chesca / Loughborough University Usage Restrictions The image may only be used with appropriate caption or credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.