Solid electrolytes, and electrolyte capacitors containing same
AssigneeBayer Aktiengesellschaft
InventorsFriedrich Jonas, Gerhard Heywang, Werner Schmidtberg
Life of this patent
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Abstract
The invention relates to the use fo polythiophenes which are built up from structural units of the formula ##STR1## in which R.sub.1 and R.sub.2, independently of one another, stand for hydrogen or a C.sub.1 -C.sub.4 -alkyl group, or, together, form an optionally substituted C.sub.1 -C.sub.4 -alkylene radical or a 1,2-cyclohexylene radical, solid electrolytes in electrolyte capacitors, and to the electrolyte capacitors containing these solid electrolytes.
Claims11
In a solid electrolyte capacitor with a solid electrolyte the improvement which comprises using as the solid electrolyte a polythiophene which is built up from structural units of the formula ##STR4## in which R.sub.1 and R.sub.2, independently of one another, stand for hydrogen or a C.sub.1 -C.sub.4 -alkyl group or, together, form a C.sub.1 -C.sub.4 -alkylene radical or a substituted C.sub.1 -C.sub.4 -alkylene radical or a 1,2-cyclohexylene radical.
In a method for forming a solid electrolyte capacitor the improvement which comprises producing the polythiophene directly on the metal foil which is used as the anode and is coated on one side with an oxide coating, by oxidative polymerization of 3,4-dialkoxythiophenes of the formula ##STR5## in which R.sub.1 and R.sub.2, independently of one another, stand for hydrogen or a C.sub.1 -C.sub.4 -alkyl group or, together, form a C.sub.1 -C.sub.4 -alkylene radical, a substituted C.sub.1 -C.sub.4 -alkylene radical or a 1,2-cyclohexylene radical.
Dependencies are inferred from the claim text.