The research and development of the ultrasensitive and large-area X-ray CCD

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The most essential subject for this study is to block the visible and violet light for the X-ray CCD in space use. The objectives of this study was to establish both thetechnology which enables to coat OBL (Optical Blocking Layer) with controlling its thickness directly on the surface of the back illuminated X-ray CCD (BI-CCD) and establishing the performance evaluation method for BI-CCD with OBL. With this research, we have established the technology which coated with the optimal thickness of the polyimide which constitutes OBL. Furthermore, we have established both the evaluation method of both the optical and violet-rays transmission of OBL and the evaluation method of the thickness of OBL.