A KNN thin-film wafer (IMAGE) Kyushu University Caption A potassium sodium niobate (KNN) thin-film wafer Credit Sumitomo Chemical Co., Ltd. Usage Restrictions Only for media and non-commercial use. License Original 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.