Inkjet-printed resistors with a wide resistance range for printed read-only memory applications

Abstract

Inkjet-printed resistors with resistance values varying over five orders of magnitude were demonstrated on a flexible substrate. The resistivity of printed lines of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) was altered by using different ink formulations and by employing an over-print technique, while the length of the printed resistor line remained unchanged. This technique was then applied to fabricate a printed read-only memory device that consisted of an array of resistors. The concept of printing reliable, visually identical resistors with controlled resistance values provides an important building block for low cost, printed electronic circuit applications. (C) 2013 Elsevier B.V. All rights reserved.