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Soft Error Rate Trends


Traditionally, DRAM has had the most attention in the quest to reduce, or work-around soft errors, due to the fact that DRAM has comprised the majority-share of susceptible device surface area This counterintuitive result occurs for two reasons. SELSE Workshop Website - Website for the workshop on the System Effects of Logic Soft Errors Retrieved from "" Categories: Computer memoryData qualityDigital electronicsHidden categories: Pages using citations with accessdate and The system returned: (22) Invalid argument The remote host or network may be down. check over here

Either of the charged particles (alpha or 7Li) may cause a soft error if produced in very close proximity, approximately 5┬Ám, to a critical circuit node. Institutional Sign In By Topic Aerospace Bioengineering Communication, Networking & Broadcasting Components, Circuits, Devices & Systems Computing & Processing Engineered Materials, Dielectrics & Plasmas Engineering Profession Fields, Waves & Electromagnetics General That is, the average number of cosmic-ray soft errors decreases during the active portion of the sunspot cycle and increases during the quiet portion. Generated Fri, 28 Oct 2016 01:06:00 GMT by s_wx1194 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection page

Soft Error Vs Hard Error

Register now for a free account in order to: Sign in to various IEEE sites with a single account Manage your membership Get member discounts Personalize your experience Manage your profile Please try the request again. Usuki (all of Sony), and Y. For applications in medical electronic devices this soft error mechanism may be extremely important.

ISSN0036-8075. In addition, before the correction can occur, the system may have crashed, in which case the recovery procedure must include a reboot. doi:10.1126/science.206.4420.776. Single Event Upset The rate of upsets in aircraft may be more than 300 times the sea level upset rate.

Please try the request again. Soft Error In Memory Integrated circuit manufacturers eliminated borated dielectrics by the time individual circuit components decreased in size to 150nm, largely due to this problem. This process may result in the production of charged secondaries, such as alpha particles and oxygen nuclei, which can then cause soft errors. Your cache administrator is webmaster.

Because the alpha particle contains a positive charge and kinetic energy, the particle can hit a memory cell and cause the cell to change state to a different value. Seu Since the area and power overhead of radiation hardening can be restrictive to design, the technique is often applied selectively to nodes which are predicted to have the highest probability of This involves increasing the capacitance at selected circuit nodes in order to increase its effective Qcrit value. The computer tries to interpret the noise as a data bit, which can cause errors in addressing or processing program code.

Soft Error In Memory

Boron-11, used at low concentrations as a p-type dopant, does not contribute to soft errors. Unsourced material may be challenged and removed. (November 2011) (Learn how and when to remove this template message) In electronics and computing, a soft error is a type of error where Soft Error Vs Hard Error This approach, however, often incurs performance overhead, area overhead (if copies of latches are used to store data), and power overhead, though is considerably more area-efficient than modular redundancy. Sram Soft Error Rate Chip-level soft errors occur when particles hit the chip, e.g., when the radioactive atoms in the chip's material decay and release alpha particles into the chip.

doi:10.1147/rd.401.0019. ^ a b Tom Simonite, Should every computer chip have a cosmic ray detector?, New Scientist, March 2008 ^ Gordon, M.S.; Goldhagen, P.; Rodbell, K.P.; Zabel, T.H.; Tang, H.H.K.; Clem, check my blog In practice, however, few designers can afford the greater than 200% circuit area and power overhead required, so it is usually only selectively applied. Generated Fri, 28 Oct 2016 01:06:00 GMT by s_wx1194 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection System-level soft errors occur when the data being processed is hit with a noise phenomenon, typically when the data is on a data bus. Dram Soft Error Rate

  • Burying a system in a cave reduces the rate of cosmic-ray induced soft errors to a negligible level.
  • Computers operated on top of mountains experience an order of magnitude higher rate of soft errors compared to sea level.
  • Several research efforts addressed soft errors by proposing error detection and recovery via hardware-based redundant multi-threading.[13][14][15] These approaches used special hardware to replicate an application execution to identify errors in the
  • This is, of course, as good a way of describing a logic upset as any I've heard ...
  • This nuclear reaction is an efficient producer of an alpha particle, 7Li nucleus and gamma ray.
  • doi:10.1145/545214.545227.

The capture cross section for 11B is 6 orders of magnitude smaller and does not contribute to soft errors.[6] Boron has been used in BPSG, the insulator in the interconnection layers Reduction in chip feature size and supply voltage, desirable for many reasons, decreases Qcrit. However, from a microarchitectural-level standpoint, the affected result may not change the output of the currently-executing program. this content N.; Pomeranz, Irith; Cheng, Karl (2002). "Transient-fault recovery using simultaneous multithreading".

Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. Ser Your cache administrator is webmaster. In a computer's memory system, a soft error changes an instruction in a program or a data value.

Often, however, this is limited by the need to reduce device size and voltage, to increase operating speed and to reduce power dissipation.

The concept of triple modular redundancy (TMR) can be employed to ensure very high soft-error reliability in logic circuits. In the context of circuit operation, this erroneous output value may be considered a soft error event. Use of this web site signifies your agreement to the terms and conditions. Fit In these early devices, chip packaging materials contained small amounts of radioactive contaminants.

Please try the request again. The sun does not generally produce cosmic ray particles with energy above 1GeV that are capable of penetrating to the Earth's upper atmosphere and creating particle showers, so the changes in A 2011 Black Hat paper discusses the real-life security implications of such bit-flips in the Internet's DNS system. have a peek at these guys Hard figures for DRAM susceptibility are hard to come by, and vary considerably across designs, fabrication processes, and manufacturers. 1980s technology 256 kilobit DRAMS could have clusters of five or six

Benefits of Chipkill-Correct ECC for PC Server Main Memory - A 1997 discussion of SDRAM reliability - some interesting information on "soft errors" from cosmic rays, especially with respect to Error-correcting This article needs additional citations for verification. Unfortunately, a higher Qcrit also means a slower logic gate and a higher power dissipation. Please try the request again.

For comparison, the count rate of a typical shoe's sole is between 0.1 and 10 cph/cm2. Kobayashi, K. For instance, many failures per million circuits due to soft errors can be expected in the field if the system does not have adequate soft error protection. Tsuchiya, H.

ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection to failed. Ziegler led a program of work at IBM which culminated in the publication of a number of papers (Ziegler and Lanford, 1979) demonstrating that cosmic rays also could cause soft errors. In the spacecraft industry this kind of error is called a single event upset. If all three masking effects fail to occur, the propagated pulse becomes latched and the output of the logic circuit will be an erroneous value.

So, even a multi-cell upset leads to only a number of separate single-bit upsets in multiple correction words, rather than a multi-bit upset in a single correction word. doi:10.1145/342001.339652.