面向嵌入式應用的阻變式存儲器和動態(tài)隨機存儲器的測試表征及優(yōu)化
發(fā)布時間:2018-01-27 07:11
本文關鍵詞: 嵌入式系統(tǒng) 阻變式存儲器(RRAM) 動態(tài)隨機存取存儲器(DRAM) 表征及測試方法 輻射 出處:《復旦大學》2012年碩士論文 論文類型:學位論文
【摘要】:近年來,隨著大規(guī)模、超大規(guī)模集成電路的不斷發(fā)展,嵌入式系統(tǒng)因其集成度高、運行速度快、功耗低、可靠性好等特點得到廣泛應用。作為嵌入式系統(tǒng)硬件中不可或缺的組成部分,嵌入式存儲器在半導體芯片中的作用非常重要,它的存儲特性直接決定了整個系統(tǒng)的工作性能。隨著數字、模擬電路的快速發(fā)展,為配合嵌入式系統(tǒng)整體性能的提升,各類新型的存儲器也不斷涌現出來。 本文針對組內研發(fā)的阻變式存儲器和兩款新型的動態(tài)隨機存取存儲器在嵌入式系統(tǒng)中的應用需求,聚焦于單元存儲性能的提升,以測試表征為手段,通過對實際芯片的測試反映出存儲器芯片的運行效率和存儲特性。之后,根據測試結果的統(tǒng)計和分析,從設計方法、工藝條件和編程算法三個角度對存儲器的良率、數據保持時間、可制造性等方面進行了優(yōu)化,以達到實際的應用需求。 另外,本文還針對阻變式存儲器芯片在輻射領域中的應用,對芯片的抗輻射能力進行研究和分析。與普通的應用環(huán)境相比,輻射會在器件內部產生額外的缺陷,影響器件的性能,甚至導致整個系統(tǒng)無法正常工作。因此,對于存儲器在輻射領域的應用,需要提出一套能夠表征輻照性能的參數以及相應的測試方法。從測試結果來看,現階段的阻變存儲單元具備了很好的抗輻射特性,但芯片的外圍電路還需要引入必要的抗輻射措施進行加固。
[Abstract]:In recent years, with the continuous development of large-scale and VLSI, embedded systems have high integration, high speed and low power consumption. As an indispensable part of embedded system hardware, embedded memory plays an important role in semiconductor chips. With the rapid development of digital and analog circuits, all kinds of new types of memory are emerging in order to improve the overall performance of embedded system. Aiming at the application demand of resistive memory and two new types of dynamic random access memory in embedded system, this paper focuses on the improvement of cell storage performance by means of testing and characterization. Through the actual chip test reflects the memory chip operation efficiency and storage characteristics. Then, according to the test results statistics and analysis, from the design method. In order to meet the practical application requirements, the process conditions and programming algorithms are optimized in terms of memory yield, data retention time and manufacturability. In addition, aiming at the application of the resistive memory chip in the radiation field, the anti-radiation ability of the chip is studied and analyzed, which is compared with the common application environment. Radiation will cause additional defects in the device, affect the performance of the device, and even lead to the entire system can not work properly. Therefore, for memory applications in the field of radiation. It is necessary to propose a set of parameters that can characterize the radiation performance and the corresponding testing methods. From the test results, the resistive memory cells have good radiation resistance characteristics. But the peripheral circuit of the chip also needs to introduce the necessary anti-radiation measures to strengthen.
【學位授予單位】:復旦大學
【學位級別】:碩士
【學位授予年份】:2012
【分類號】:TP333
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