Microhouse Roof (IMAGE) American Institute of Physics Caption A microhouse's tiled roof shows the ion gun's new ability to focus on a 300-by-300-micrometer area. Credit FEMTO-ST Institute Usage Restrictions This image may be used only with appropriate 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.