2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)最新文献

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Fault-pattern oriented defect diagnosis for flash memory 面向故障模式的闪存缺陷诊断
Mu-Hsien Hsu, Yu-Tsao Hsing, J. Yeh, Cheng-Wen Wu
{"title":"Fault-pattern oriented defect diagnosis for flash memory","authors":"Mu-Hsien Hsu, Yu-Tsao Hsing, J. Yeh, Cheng-Wen Wu","doi":"10.1109/MTDT.2006.13","DOIUrl":"https://doi.org/10.1109/MTDT.2006.13","url":null,"abstract":"In order to ease the time-to-market pressure of flash memory, we propose a fault-pattern based diagnosis methodology that reduces the burden in yield learning. The fault-pattern based diagnosis approach is based on defect dictionary and ATE log file. The proposed diagnosis method allows product engineers to quickly isolate defect candidates. In this paper we use open/short defects to demonstrate our method. We propose a diagnostic test algorithm for flash memory based on the targeted defect models. The length of the new diagnostic test is shorter than previous ones, so diagnosis time can be reduced. Experimental results show that the diagnostic resolution of fault-pattern based method reaches 83.3% for a NOR-type flash, and 100% for a NAND-type flash. We also present a current test to improve the diagnostic resolution for NOR-type flash, so its diagnostic resolution can reach 100% as well","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129005805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Dynamic data stability in SRAM cells and its implications on data stability tests SRAM单元的动态数据稳定性及其对数据稳定性测试的影响
M. Sharifkhani, S. Jahinuzzaman, M. Sachdev
{"title":"Dynamic data stability in SRAM cells and its implications on data stability tests","authors":"M. Sharifkhani, S. Jahinuzzaman, M. Sachdev","doi":"10.1109/MTDT.2006.12","DOIUrl":"https://doi.org/10.1109/MTDT.2006.12","url":null,"abstract":"The paper discusses the concept of dynamic data stability in the SRAM cells. It is shown that the criteria for the absolute static data stability in an SRAM cell is a sub-set of its dynamic data stability. Hence, test methods that are based on dynamic stress of the cell have limited success in discovering the defective cells. Hammer test, for example, fails to discover the faults in an SRAM cell when it is data stable in the dynamic sense but not statically data stable. It will be shown that a long cell access time can detect such faults as it reduces the effect of the dynamic data stability. This method can be combined with stressed cell methods to achieve higher accuracy. Simulation results in a 130nm CMOS technology confirm the method with a good success","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125616833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Comparison of electrical and reliability characteristics of different tunnel oxides in SONOS flash memory SONOS快闪记忆体中不同隧道氧化物的电学特性及可靠性比较
Jia-Lin Wu, Hua-Ching Chien, Chien-Wei Liao, Cheng-Yen Wu, Chih-Yuan Lee, Houng-Chi Wei, Shi-Hsien Chen, H. Hwang, S. Pittikoun, Travis Cho, C. Kao
{"title":"Comparison of electrical and reliability characteristics of different tunnel oxides in SONOS flash memory","authors":"Jia-Lin Wu, Hua-Ching Chien, Chien-Wei Liao, Cheng-Yen Wu, Chih-Yuan Lee, Houng-Chi Wei, Shi-Hsien Chen, H. Hwang, S. Pittikoun, Travis Cho, C. Kao","doi":"10.1109/MTDT.2006.8","DOIUrl":"https://doi.org/10.1109/MTDT.2006.8","url":null,"abstract":"The characteristics of polysilicon-oxide-nitride-oxide-silicon (SONOS) devices with different tunnel oxides are studied. The tunnel oxide fabricated by high-temperature oxide (HTO) with additional NO annealing treatment (HTO (NO*)) has better performance than that fabricated by HTO only and in-situ steam generated oxide (ISSG) including operation window, retention, and endurance. Besides, the properties of charge-to-breakdown are also observed. The study can provide a straightforward way of reliability for future flash memory application","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128513378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Non-volatile Semiconductor Memory Technology in Nanotech Era 纳米技术时代的非易失性半导体存储技术
Chih-Yuan Lu
{"title":"Non-volatile Semiconductor Memory Technology in Nanotech Era","authors":"Chih-Yuan Lu","doi":"10.1109/MTDT.2006.21","DOIUrl":"https://doi.org/10.1109/MTDT.2006.21","url":null,"abstract":"Non-volatile semiconductor memory, especially Flash memory has seen explosive growth in recent years because of unceasing demand for higher performance and density for cell phone, digital still camera, camcorder, MP3, consumer electronics and automotive applications. Despite the rosy outlook, both NOR and NAND Flash technologies face steep challenges to further scale down into the sub-45nm nodes. At 45nm node both technologies confront fundamental physics limitations - the non-scalability of tunnel oxide and cross talk between floating gates. This paper examines the scaling limits for Flash memories and surveys potential solutions that promise to carry nonvolatile memories further down the Moore’s curve at 32nm node and beyond.","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"6 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122050278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
High-Quality Memory Test 高质量记忆测验
M. Azimane
{"title":"High-Quality Memory Test","authors":"M. Azimane","doi":"10.1109/MTDT.2006.17","DOIUrl":"https://doi.org/10.1109/MTDT.2006.17","url":null,"abstract":"Semiconductor Companies are continuously trying to keep their customers Happy and Satisfied with new products, new functionalities and new interfaces. To keep track on inventing products with new more facilities, Semiconductor Companies have to include much more transistors per millimeter square than ever before. Nowadays, System on Chips (SoCs) are very dense, approaching 1 billion of transistors per chip of few millimeters. Interaction of this huge number of transistors in a chip is becoming much more important than few years ago. To be specific, in current process technologies new defects mechanisms and process variation are causing complex faulty behaviours, which are creating new challenges for test experts. Moreover, embedded memories occupy a big portion of SoCs approaching nowadays 70% of total SoC area and are infringing the DFM rules, which creates even higher defect density than logic or analog blocks. This tutorial will give an overview about high quality memory testing in industrial environment, and how Semiconductor Companies are surviving in competitive markets by delivering high quality products and targeting for Zero Defect escapes for specific customers (e.g., Automotive, Medical Systems, Avionics, etc.). Also, an overview about closing the loop with memory designers and process engineers in early phase of the design is highlighted. Such loop could easily improve the test & yield of embedded memories in short market time window by taking decisive actions on layout level.","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"843 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117209389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SRAM cell current in low leakage design SRAM电池电流低漏设计
D. Kwai, Ching-Hua Hsiao, C. Kuo, C. Chuang, M. Hsu, Yi-Chun Chen, Yu-Ling Sung, H. Pan, Chia-Hsin Lee, Meng-Fan Chang, Yung-Fa Chou
{"title":"SRAM cell current in low leakage design","authors":"D. Kwai, Ching-Hua Hsiao, C. Kuo, C. Chuang, M. Hsu, Yi-Chun Chen, Yu-Ling Sung, H. Pan, Chia-Hsin Lee, Meng-Fan Chang, Yung-Fa Chou","doi":"10.1109/MTDT.2006.28","DOIUrl":"https://doi.org/10.1109/MTDT.2006.28","url":null,"abstract":"This paper highlights the cell current characterization of a low leakage 6T SRAM by adjusting the threshold voltages of the transistors in the memory array to reduce the standby power. Experiments using a 0.25 mum 2.5V standard CMOS process with and without the additional threshold voltage adjustment implant on a 1Mb test chip demonstrate the effectiveness. A substantial standby power reduction by an order of magnitude is achievable. However, it incurs a wider cell current variation, which is pronounced only at a lower supply voltage. As the supply voltage decreases, the percent deviation from the average value increases. This can be modeled by a simple power-law relationship. The result has important implications in both design and manufacturing of the low leakage SRAM. Comparing with the generic cell current without the additional threshold voltage adjustment, the crossover point of their percent deviations at 2V signifies two separate circuit strategies: operating at 1.5V requires larger sensing margin and operating at 2.5V enjoys better manufacturability. Hence, for the applications requiring low voltage operations, it favors a boosted supply voltage applied to a selected cell during the read access","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131095941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
SRAM Design Techniques for Sub-nano CMOS Technology 亚纳米CMOS技术的SRAM设计技术
Jordan Lai
{"title":"SRAM Design Techniques for Sub-nano CMOS Technology","authors":"Jordan Lai","doi":"10.1109/MTDT.2006.29","DOIUrl":"https://doi.org/10.1109/MTDT.2006.29","url":null,"abstract":"The scaling of CMOS technology has significant impacts on SRAM cell – random fluctuation of electrical characteristics and substantial leakage current. The random fluctuation of electrical property causes the symmetrical 6T cell to have huge mismatch in transistor threshold voltage. Consequently, the static noise margin (Read Margin) and the write margin are degraded dramatically. The SRAM cell tends to be unstable and the low power supply operation becomes hard to achieve. Besides that, the large leakage current caused by the low threshold voltage and thin gate oxide let the sub-nano SRAM design have huge static power. This makes portable electronics applications become difficult. In this talk, several design techniques used to minimize the static power consumption will be addressed and compared first. Second, in order to increase the read/write margins of SRAM cell, the VDC (Voltage Down Converter) approach will be discussed. It is founded that by using a simple VDC design, the RM (Read Margin) and WM (Write Margin) can be significantly improved and let the SRAM design be functional in the 0.7V range. The yield of the SRAM chip can also be dramatically improved. Incorporated with a resistor-less BGR (Bandgap Reference) design, this VDC can be used for static power reduction, read margin and write margin improvement, programmable voltage and voltage clamping.","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114271501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detailed Comparisons of Program, Erase and Data Retention Characteristics between P+- and N+-Poly SONOS NAND Flash Memory P+-和N+- poly SONOS NAND闪存的程序、擦除和数据保留特性的详细比较
V. C. Kuo, Chih-Ming Chao, Chih-Kai Kang, Li-Wei Liu, Tzung-Bin Huang, L. Kuo, Shi-Hsien Chen, Houng-Chi Wei, H. Hwang, S. Pittikoun
{"title":"Detailed Comparisons of Program, Erase and Data Retention Characteristics between P+- and N+-Poly SONOS NAND Flash Memory","authors":"V. C. Kuo, Chih-Ming Chao, Chih-Kai Kang, Li-Wei Liu, Tzung-Bin Huang, L. Kuo, Shi-Hsien Chen, Houng-Chi Wei, H. Hwang, S. Pittikoun","doi":"10.1109/MTDT.2006.10","DOIUrl":"https://doi.org/10.1109/MTDT.2006.10","url":null,"abstract":"In this paper, one of the future nonvolatile memory candidates, SONOS with p+-poly gate, has been fully characterized in cell program/erase operation and data retention performance. Novel source-side injection programming and F-N erase schemes have been utilized on both n+- and p+-poly gate, and its characteristics are very satisfactory and can be easily used as a state-of-the-art flash memory. For data retention, our experimental result shows p+-poly does have a slower charge decay rate than does n+-poly gate. This is because of the work function difference between n+- and p+-poly gate that causes the different amount of trapped electrons between two of them. We also predict the charge loss characteristics with various baking temperature for n+- and p+-poly gate, which can tell us the concrete threshold voltage at any read delay time instead of the traditional and inaccurate long time projection from short time status","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115437296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
On the combined impact of soft and medium gate oxide breakdown and process variability on the parametric figures of SRAM components 软、中栅极氧化物击穿和工艺变异性对SRAM元件参数值的综合影响
Hua Wang, M. Corbalan, F. Catthoor, W. Dehaene
{"title":"On the combined impact of soft and medium gate oxide breakdown and process variability on the parametric figures of SRAM components","authors":"Hua Wang, M. Corbalan, F. Catthoor, W. Dehaene","doi":"10.1109/MTDT.2006.23","DOIUrl":"https://doi.org/10.1109/MTDT.2006.23","url":null,"abstract":"The effect of gate oxide breakdown has long been studied in the context of device functional failure in the past. As technology node scales down to very deep submicron (VDSM) era, such an effect starts to influence the performance and power consumption of digital circuits within their lifetime. Meanwhile, process variability like threshold voltage shift due to e.g., device dopant fluctuation and/or line edge roughness effects also leads to significant shift of the parametric figures for performance and energy of these circuits at sub 100nm era. Further scaling will definitely lead to the co-existence of both effects in a single circuit. In this paper, we present the experimental analysis on the impact combining gate oxide breakdown and process variability on the energy and delay figures of SRAM cell and sense amplifier. Hspice simulations at 65nm technology node indicate a significantly larger shift in both energy and delay of these components than in the cases with either single effect when using the thinner oxide found in 45/32 nm technologies. The actual behavior of the circuits under such a situation becomes more difficult to predict and control, thus bringing a huge challenge to a successful design in the VDSM era","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127808402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Roadmap of the Flash Memory Flash Memory路线图
R. Shirota
{"title":"Roadmap of the Flash Memory","authors":"R. Shirota","doi":"10.1109/MTDT.2006.27","DOIUrl":"https://doi.org/10.1109/MTDT.2006.27","url":null,"abstract":"It has become 19 years, since the development of the NAND Flash started using 0.7..m rule in 1987. The speed of the scaling has been very fast and the period of the product of the new generation is less than 2 years. Now, design rule of the NAND Flash memory has become less than 70nm. There are some problems to interfere with the scaling of the memory cell. Basic idea to overcome these problems will be introduced in this talk.","PeriodicalId":320365,"journal":{"name":"2006 IEEE International Workshop on Memory Technology, Design, and Testing (MTDT'06)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128422753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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