Complementary resistance switch, contact-connected polycrystalline piezo- or ferroelectric thin-film layer, method for encrypting a bit sequence

US9812640B2 · kind B2 · utility

Assignee

• HELMHOLTZ-ZENTRUM DRESDEN-ROSSENDORF E.V. · DE

Inventors

• Tiangui You · Chemnitz, DE
• Heidemarie Schmidt · Dresden, DE
• Nan Du · Palo Alto, US
• Danilo Buerger · Augsburg, DE
• Ilona Skorupa · Dresden, DE
• Niveditha Manjunath · Chemnitz, DE

Key dates

• Filing date: Jul 16, 2015
• Grant date: Nov 7, 2017
• Expiry date: Sep 10, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Disclosed is a complementary resistor switch (3) comprising two outer contacts, between which two piezo- or ferroelectric layers (11a and 11b) having an inner common contact are situated. At least one region (11′, 11″) of the layers is modified, either the outer contacts are rectifying (S) and the inner contact is non-rectifying (0), or vice versa, the modified regions are formed at the rectifying contacts, the layers have different strain-dependent structural phases with different band gaps and/or different polarization charges, and the electrical conductivity of the layers is different. Also disclosed are a connectable resistor structure having at least one Schottky contact at two adjoining piezo- or ferroelectric layers, a polycrystalline piezo- or ferroelectric layer comprising modified crystallites, and a method and circuits for encrypting and decrypting a bit sequence.