A method for precisely producing a polyether having a relatively high molecular weight by means of a double metal cyanide complex catalyst is provided. A wireless system comprising a memory and a processor is described. Therefore, when the computer system is in a screen protection mode and even when the user password of the user of the computer system is not known, another person can inform the user of a useful message using the computer system. The trench MIM capacitor is connected to the FET by a metallic strap.