{"title":"Design and analysis of a synchronous dram memory module","authors":"G. Ley, D. Phipps","doi":"10.1109/MTDT.1996.782495","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782495","url":null,"abstract":"A synchronous DRAM Dual In-Line Memory Module (DIMM) was designed and characterized. Functional and parametric results illustrate the performance of the module and highlight areas of concern in high-speed memory module design.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114862470","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}
{"title":"Thermal monitoring of memories","authors":"V. Székely, B. Courtois","doi":"10.1109/MTDT.1996.782497","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782497","url":null,"abstract":"3D packaging of memories, downscaling of the memory chips populating these packages, make thermal issues more and more serious. The goal of this paper is to propose means to detect potential problems and to suggest how to include these mechanisms in the general framework of the design of such systems.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129816228","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}
{"title":"Built in self testing for detection of coupling faults in semiconductor memories","authors":"M. Karpovsky, D. Das, H. Vardhan","doi":"10.1109/MTDT.1996.782484","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782484","url":null,"abstract":"In this work we investigate the problem of detection and location of single and unlinked multiple pattern sensitive faults in bit oriented RAMs and implementation of a built-in self-test (BIST) unit to test RAM chips in an efficient manner. Our fault model covers cross-talks between any k cells in RAMS. We have reduced the problem of memory testing to the problem of the generation of exhaustive back grounds. Exhaustive tests for detecting coupling faults for k up to 6 (which covers Type I neighborhood) and near exhaustive tests for k up to 9 (which covers Type II neighborhood) are constructed. The systematic nature of the tests constructed enables us to use BIST schemes, for RAMs, with low hardware over heads. We implemented the BIST units for a bit-oriented memory of size IM and calculated the hardware overhead in terms of transistors and area.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124900584","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}
{"title":"Unexpected charge losses from the floating gates of eeprom memory cells","authors":"R. Allinger, M. Kerber, H.J. Mattausch, H. Braun","doi":"10.1109/MTDT.1996.782498","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782498","url":null,"abstract":"A new leakage effect, which undermines data retention on the floating gates of EEPROM memory cells, is presented. The effect was uncovered by chance, because an erase operation after high temperature bake led to the surprising result of a threshold voltage decrease, instead of the expected increase. A possible physical explanation for the responsible charge loss mechanism is given and is supported by a number of additional measurements.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121850829","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}
V. Yarmolik, Y. Klimets, A. van de Goor, S. Demidenko
{"title":"RAM diagnostic tests","authors":"V. Yarmolik, Y. Klimets, A. van de Goor, S. Demidenko","doi":"10.1109/MTDT.1996.782499","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782499","url":null,"abstract":"In this paper the following problems are considered : 1) march test's diagnostic capability estimation, ie. the type of the fault and it's location; 2) advanced march tests with diagnostic ability; 3) a march test with the same fault coverage as test March C and optimal diagnostic ability.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126699295","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}
{"title":"Flash memory technology - a review","authors":"K. Rajkanan","doi":"10.1109/MTDT.1996.782491","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782491","url":null,"abstract":"Since the first flash memory patent issued on October 6, 1987, flash memory’s multiple useful characteristics, including nonvolatility, in-circuit reprogrammability, low power consumption, and high density, have led it to become the fastest growing memory segment in recent years. Mobile computing and communication have driven the demand for flash memories. Nascent applications, such as digital cameras, personal digital assistants (PDA), digital telephone answering devices @TAD) are expected to further add to growth in flash memory demand. Typically, flash memories are descendants of EPROM or EEPROM technologies and therefore many similarities in the architecture and operation can be noticed. As in the case of EPROMs, flash devices based on NOR architecture and the hot-electron injection mechanism for programming still dominate the marketplace. To provide erasability, the Fowler-Nordheim tunneling mechanism is typically employed. However, booming demand for flash memory has set-off a ferment of new architectures, cell structures, and manufacturing processes. For mass storage applications, NAND architecture is emerging as a contender. AND and DiNOR (Divided bit-line NOR) architectures have also emerged, each having their own advantages and disadvantages. Requirements on low power, low voltages, and higher densities have led to the development of devices which use Fowler-Nordheim tunneling for both programming and erasing. Multilevel 1087-4852/96 $5.00","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129656462","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}
{"title":"Flash memory quality and reliability issues","authors":"R. Verma","doi":"10.1109/MTDT.1996.782488","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782488","url":null,"abstract":"The Flash memory technology uses dual layer polysilicon gate technology to store charge permanently. With the technology shrinking to smaller geometries, there comes the quality and reliability issues of the small geometry in addition to the existing memory reliability issues. The NOR flash cell architecture and its programming and erasing techniques are discussed. The paper describes some of the quality and reliability issues which exist in the flash memories today and the stresses done to evaluate those issues.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120960935","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}
{"title":"Proposed on-chip test structure to quantify trap densities within flash meories","authors":"V. Verma, A. Swaneck","doi":"10.1109/MTDT.1996.782486","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782486","url":null,"abstract":"Degradation of the program/erase characteristics of Flash memory due to cycling is an industry wide reliability concern. This degradation in performance is associated with trapped charges present within the memory cells dielectric. The implementation of an on chip test structure is proposed, allowing trapping characteristics of the Flash memory cells to be monitored. This paper discusses the on-chip test structure, program/erase characteristics of Flash memories, and electron trap density measurements.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116558215","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}
{"title":"Giga-bit DRAM trend","authors":"T. Furuyama","doi":"10.1109/MTDT.1996.782490","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782490","url":null,"abstract":"DRAM’s have been achieving higher and higher memory capacity by reducing the device sizes and complicating the memory cell structures. At present, 64M’s are available in the market and 1 GIs are under development in many semiconductor companies. Some early 1 G chips were presented at the ISSCC (International Solid State Circuits Conference) last year for the first time. DRAM’s have been also getting faster and faster as the generation has proceeded by taking an advantage of device miniaturization as well as adopting new circuit designs, such as Synchronous DRAM and Rambus technologies. Many questions have been recently raised, however, including the limit of existing memory cell technologies, how to improve speed to catch up the processor operation without blowing up the power consumption, how to realize a system that does not require as large amount of memory as the most advanced DRAM’s can provide by a single chip but requires very high data rate and performance, and so on. Test time/cost reduction is also an issue. In this presentation, I will review the state of the art DRAM technologies, functions, and circuit design topics. Trench and stacked cell technologies for 1 G DRAM’s will be compared. Different DRAM functions will be reviewed and their performances will be compared. I would also like to explore some of the issues and questions and to review some ideas recently published intending to solve these issues. The DRAM and Logic merged technology, which is presently a very hot topic in the industry and getting more and more popular, will be discussed as a candidate to provide fairly small amount of memory but high performance. Future DRAM trends from technology, function, application and other points of view, will be briefly summarized.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133733616","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}
K. Pey, Y.E. Strausser, A. Erickson, A. Leslie, M. Beh, T. T. Sheng
{"title":"Scanning capacitance microscopy analysis of dram trench capacitors","authors":"K. Pey, Y.E. Strausser, A. Erickson, A. Leslie, M. Beh, T. T. Sheng","doi":"10.1109/MTDT.1996.782496","DOIUrl":"https://doi.org/10.1109/MTDT.1996.782496","url":null,"abstract":"Two dimensional dopant concentrations of the side walls of trench capacitor cells of dynamic random access memory devices were profiled using the scanning capacitance microscopy technique. This technique permits the first direct study and semi-quantification of the dopant profiles in the silicon substrate as a function of trench depth. The SCM results indicate that for a fixed trench depth, the dopant profiles in any radial direction of the trench are consistent. However, difference in dopant distribution is clearly revealed between areas that are very close to the top of the trench and those situated deep in the silicon substrate. Variation in the SCM signal at the n+ doped bit-line contacts of the transfer gate transistor is attributed to possibly dopant redistribution during contact formation process.","PeriodicalId":228146,"journal":{"name":"IEEE International Workshop on Memory Technology, Design and Testing,","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133218212","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}