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ZnO thin films, as polymer protection layers against ultraviolet radiation, were deposited on polyimide foil substrates using cathodic vacuum arc deposition technique. X-ray diffraction results showed that all the samples had (0 0 2) preferred orientation and the FWHM decreased as the position angle decreased. A fragmentation test was employed to investigate the influence of substrate position angle on the adhesion of ZnO thin films. It was found that the intrinsic adhesion between the ZnO film and the polyimide substrate is about 60 MPa at the substrate position angle of 0°. When the position angle increases to ±60°, the value of intrinsic adhesion decreases to about 30 MPa.

One of the most significant requirements driving CCD assemblies design is the operating temperature. In order to avoid unaccepted dark current, CCD need operate between 7°C and 15°C and temperature gradient across the focal plane should be not greater than 1.0°C. These requirements must be achieved by combining active and passive measures. This paper focuses on the precise thermal control design, analysis and test. Because CCD assemblies include focal electronics and movable precise focalizing parts, thermal control must utilize the integrated method to achieve compatible design. Largely using standard and well-proven technologies, this paper also points out some special techniques used. Based on finite difference method and transient energy equations, thermal model of CCD assemblies were built utilizing thermal software and solved for extreme cases. To validate the design, thermal balance test has been done. Analysis and test results have shown that CCD temperature can be controlled between 7.2°C and 13.5°C and temperature gradient was less than 0.5°C. These jobs could give some guidance and reference for the precise thermal control of CCD assembly of other space optical remote-sensor.

ZnO thin films, used as polymer protection layers against ultraviolet radiation and atomic oxygen for space application, were deposited on polyimide foil substrates using a cathodic vacuum arc deposition technique. A fragmentation test was employed to investigate the influence of deposition pressure on the adhesion of ZnO thin films. It was found that all the samples have good adhesive properties. Low deposition pressure is beneficial to the adhesion of ZnO films and polyimide substrates. Scanning electron microscopy was also employed to investigate the surface morphology of ZnO films that had suffered from large strain. No large areas of film detachment were found.