Memory firms detail sub-20-nm NAND chips
February 24, 2012 // EE Times
Engineers from Samsung Electronics Co. Ltd., Toshiba Corp., and SanDisk Corp., took to the podium to provide details of their respective 19-nm NAND flash chips in presentations at the International Solid-State Circuit Conference (ISSCC) on Wednesday (February 22).
Samsung's Daeyeal Lee delivered a paper describing the company's 64-Gbit multi-level cell (MLC) NAND device implemented in sub-20-nm technology. The device features a 533-megabit-per-second DDR interface achieved by implementing a wave-pipeline architecture, Lee said. The chip also makes use of new techniques to overcome floating-gate coupling interference and mitigate program disturbance, Lee said.
According to Lee, the use of the new schemes, known as correction-before-recoupling reprogram and P3 pattern pre-pulse scheme, results in a 21 percent lower bit error rate compared with conventional techniques. Lee described another technique, inhibit-channel-coupling-reduction, for mitigating program disturbance in the chip.
A bit of controversy erupted at the end of Lee's presentation, when one audience member, who identified himself as a member of conference's memory subcommittee, chastised Lee for declining to describe the size of memory cell size of the chip, suggesting that Samsung was not providing enough information for an ISSCC paper.
Earlier Wednesday, Toshiba's Noboru Shibata described his company's 19-nm multi-level 64-Gbit NAND device. Shibata said the chip's die size is 112.8 square millimeters, the smallest ever reported for a NAND flash device.
According to Shibata's presentation, the Toshiba chip, which was developed under its long-standing collaboration with SanDisk, achieves an industry first with 15-megabyte-per-second programming throughput. The device employs a one-sided, all-bitline architecture and single-array configuration, he reported. The chip also employes a high-speed toggle-mode interface, he reported.
Asked to comment on the write cycle endurance of the device—an increasing concern as chip makers shrink the feature sizes of NAND—Shibata said it was equivalent to Toshiba's 24-nm NAND. Shibata's presentation described the implementation of a new memory cell programming algorithm meant to mitigate program disturbances.
Also Wednesday, Yan Li, director of memory design at SanDisk, presented a paper on SanDisk's 19-nm, 128-Gbit monolithic device that stores 3-bits per memory cell, the highest density IC ever produced.
Biodegradable electronics debut
July 03, 2015
Today our landfills are being overrun by discarded electronic devices fabricated on silicon substrates that do not biodegrade ...
Power magnetics Lab Kit enters education
Automotive software design: new challenges through multiprocessing
Ultrasound sensor protects pedestrians
Dielectric material helps keep LED packages much cooler
PowerChip plans Chinese fab for display, sensor ICs
July 02, 2015
A former DRAM vendor, now foundry, is joining a trend towards supporting manufacturing in China, according to local reports. ...
XeThru Bot simulates breathing for sensor testing: built from Lego
Sony to raise $3.6bn to speed reinvention as component company
Startup's tech is Intel's Quark neural network
- Critical Requirements in High Speed Signal Generation Applications
- The 400XAC Series: Two Major Advantages that Simplify Functional Testing
- A Smart Way to Drive ECU Consolidation
- Autonomous Driving: An Eye on the Road Ahead
InterviewCEO interview: Cadence is about enablement, collaboration
EDA companies are being asked to provide expertise from the circuit- to the system-level observes Lip-Bu Tan, CEO of EDA software vendor Cadence Design Systems Inc. Covering such a breadth of endeavour ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.