Purpose

This study aims to replace current multi-layer and coplanar wire crossing methods in QCA technology to avoid fabrication difficulties caused by them.

Design/methodology/approach

Quantum-dot cellular automata (QCA) is one of the newly emerging nanoelectronics technology tools that is proposed as a good replacement for complementary metal oxide semiconductor (CMOS) technology. This technology has many challenges, among them being component interconnection and signal routing. This paper will propose a new wire crossing method to enhance layout use in a single layer. The presented method depends on the central cell clock phase to enable two signals to cross over without interference. QCADesigner software is used to simulate a full adder circuit designed with the proposed wire crossing method to be used as a benchmark for further analysis of the presented wire crossing approach. QCAPro software is used for power dissipation analysis of the proposed adder.

Findings

A new cost function is presented in this paper to draw attention to the fabrication difficulties of the technology when designing QCA circuits. This function is applied to the selected benchmark circuit, and the results show good performance of the proposed method compared to others. The improvement is around 59, 33 and 75% compared to the best reported multi-layer wire crossing, coplanar wire crossing and logical crossing, respectively. The power dissipation analysis shows that the proposed method does not cause any extra power consumption in the circuit.

Originality/value

In this paper, a new approach is developed to bypass the wire crossing problem in the QCA technique.

中文翻译：

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QCA纳米技术绕过导线交叉问题的新方法

目的

本研究旨在取代目前 QCA 技术中的多层和共面导线交叉方法，以避免它们造成的制造困难。

设计/方法/途径

量子点元胞自动机 (QCA) 是新兴的纳米电子技术工具之一，被提议作为互补金属氧化物半导体 (CMOS) 技术的良好替代品。这项技术面临许多挑战，其中包括组件互连和信号路由。本文将提出一种新的导线交叉方法，以增强单层布局的使用。所提出的方法取决于中央单元时钟相位，以使两个信号能够无干扰地交叉。QCADesigner 软件用于模拟使用建议的导线交叉方法设计的全加器电路，用作进一步分析所提出的导线交叉方法的基准。QCAPro 软件用于对建议的加法器进行功耗分析。

发现

本文提出了一种新的成本函数，以引起人们在设计 QCA 电路时注意该技术的制造困难。该函数应用于选定的基准电路，结果表明，与其他方法相比，所提出的方法具有良好的性能。与报告最好的多层线交叉、共面线交叉和逻辑交叉相比，改进分别约为 59%、33% 和 75%。功耗分析表明，所提出的方法不会在电路中造成任何额外的功耗。

原创性/价值

在本文中，开发了一种新方法来绕过 QCA 技术中的导线交叉问题。