A semiconductor memory with static memory cells has an n-well in which pMOS transistors are formed and a p-well in which nMOS transistors are formed. Each flanking polymer is covalently bound to an end of the core polymer and the core polymer andor at least one of the flanking polymers is a copolymer derived from two or more monomers. The invention applies to sanitary and household papers, in particular disposable napkins and tissues.