Feasibility of a low-power, low-voltage complementary organic thin film transistor buskeeper physical unclonable function

Abstract

This paper demonstrates an implementation of physical unclonable function (PUF) using complementary organic transistors operating at low-voltage. PUF is an essential security element, and is important for various applications of organic devices. We implement a simple buskeeper PUF, which consists of two inverters. We confirm that the PUF bit values on the test chip can be read at a standard voltage for electronic circuits (3.3 V) via a standardized circuit board interface. We observed a low static current consumption (11.8 μA/90 bits) for the PUF chip. The PUF performance, chip-to-board interface performance, and requirements for the board interface in an organic transistor chip are discussed based on the measurement results of the test chip.

Extraordinarily Weak Temperature Dependence of the Drain Current in Small‐Molecule Schottky‐Contact‐Controlled Transistors through Active‐Layer and Contact Interplay

“…Development of large‐area electronics (LAE) based on organic semiconductors (OSC) has rapidly accelerated in recent years. [ 1 ] Valuable applications in lighting, [ 2 ] biosensing, [ 3 ] or security [ 4–6 ] arise from the versatile processability [ 7 ] of these materials, particularly when high‐throughput methods, such as roll‐to‐roll or inkjet printing, are concerned. [ 8 ] Even in display technology, where uniformity is paramount, manufacturers have developed the capability of fully inkjet printing organic light emitting diodes (OLEDs) [ 9 ] toward producing cost‐effective commercial displays.…”

“…Development of large-area electronics (LAE) based on organic semiconductors (OSC) has rapidly accelerated in recent years. [1] Valuable applications in lighting, [2] biosensing, [3] or security [4][5][6] arise from the versatile processability [7] of these materials, particularly when high-throughput methods, such as roll-to-roll characteristics. However, among several key design criteria, [27] the superior analog performance of SGTs is primarily enabled by the deliberate introduction of a sizeable energy barrier at the source contact, [16,17,28] which is capable of fully depleting the semiconductor at the source edge (Figure 1b,c).…”

Measurement of 64 organic thin-film transistors in an array test structure using a relay-switch board for efficient evaluation of long-term reliability

“…In this paper, we adopt attaching a flexible flat cable (FFC) to the OTFT test chip with an anisotropic conductive film (ACF). 24) FFC is attached to pads on an OTFT chip with ACF by applying heat and pressure while ensuring conductivity. This method implements the commonly used FFC on the test chip of new devices and realizes the compatibility with the common circuit board implementations.…”

“…An additional concern for early OTFT works was that the operation voltages of the OTFTs were a few tens of volts and consumed a large amount of power, thus lowering the operating voltage of the logic circuits composed of OTFTs is a focus of recent research. Considerable effort has been expended on lowvoltage operations of OTFT logic gates in the range of 5 V to 15 V. [20][21][22][23] Our past work included the low-voltage as a security component 24,25) with a 3.3 V operation and lowleakage current logic gates 26,27) with a 2.5 V operation.…”

Hybrid low-voltage physical unclonable function based on inkjet-printed metal-oxide transistors

“…Also, optical PUFs may face challenges when integrated into signal-and softwarelayers, which are mainly realized as electronic systems. Another direction in PUF research is to use novel materials and methods and adapt the concepts of Si-PUF architectures [42][43][44][45][46][47][48][49][50] . Emerging technologies, such as PE, enable decentralized, customizable manufacturing of small and mid-size volumes, which can help to establish "root of trust" in the manufacturing supply chain.…”