An X-ray window having a diamond X-ray transparent film, diamond reinforcing crosspieces and a substrate on which the diamond X-ray transparent film has been grown. As reinforcing crosspieces are made of diamond, no thermal stress is generated between the X-ray transparent film and the crosspieces. This...http://www.google.es/patents/US5258091?utm_source=gb-gplus-sharePatente US5258091 - Method of producing X-ray window