Patent ID: 7295361

Claim:
A method for producing an electrochromic device comprising at least two electrodes at least one of them is optically transparent, and a tightly closed space between the electrodes is filled with an electrochromic composition, the method including the steps of: preparing the initial electrochromic composition in the form of an electrochromic disperse system comprising a suspension and/or a colloid, wherein a dispersion medium of said disperse system comprises an electrochromic solution comprising a liquid solvent, a cathodic component and an anodic component, and a disperse phase of said disperse system comprises finely dispersed polymer particles with a size of 6×10 −5 m and less; deaerating the initial electrochromic composition to eliminate the dissolved oxygen and air introduced together with the finely dispersed polymer particles; filling the closed space between the electrodes with the deaerated initial electrochromic composition; and sealing the closed space between the electrodes.