Samsung eyes next generation of NAND to lower laptop cost

So-called TLC flash used in thumb drives today may make the leap to more tablets and ultrabooks if it's reliable enough

A new type of NAND flash storage for consumer electronics that can store data more densely might lower the cost of devices such as tablets and thin "ultrabook" laptops, according to Samsung.

Most manufacturers have not yet started using the so-called TLC (triple-level cell) chips in devices, but as they grow more comfortable with the longevity of flash, they may adopt it, said Ryan Smith, Samsung senior manager of SSD (solid-state disk) product marketing. If TLC is robust enough to handle the average user's daily activity on a device over the time they would typically own it, consumers could benefit from cheaper hardware, Smith said in an interview at the South Korean company's Silicon Valley headquarters on Tuesday.

Flash storage works by applying a high-voltage pulse to modify the charges on individual cells within a chip. SLC or single-level cell flash, used in enterprise storage equipment, applies only one charge to a whole cell, to store one bit. MLC (multilevel cell) can apply a higher or a lower charge and store two bits. TLC takes that to three bits.

TLC lets flash makers get more chips of a given capacity out of one wafer, which is why it's less expensive, according to Forward Insights analyst Gregory Wong. On the other hand, as the number of charges per cell goes up, so do the number of errors, and the number of times a user can reliably write data to the storage goes down, he added. Performance is also lower on TLC than on the other types of flash, though all are faster than hard disk drives, Wong said.

Samsung acknowledges the longevity and error issues, which can be partly solved through error correction and digital signal processing. But the company believes that MLC flash, the kind used in most laptops and tablets today, may be overkill for the needs of the average user. If TLC can keep working for however long a user keeps a machine, that machine may cost the consumer less, he said.

It's up to device makers to decide whether TLC is good enough, Smith added. Whether it can go the distance is a complicated question. A typical rule of thumb in the industry for laptop use is writing 20GB of data per day to the device, over a period of perhaps 3 years, he said. That includes files created or downloaded as well as temporarily cached Web pages and other items.

Using that standard, "TLC is on the borderline unless some special error correction or signal processing gives you some margin," Wong said. But the 20GB rule may be more than the average user needs, he added. With tablets in particular, consumers tend not to create and store much content, though tablets typically have less flash capacity and therefore fewer cells to work with over the life of the product, Wong said.

TLC is already used in removable storage devices, such as cards and USB drives, and some manufacturers have used it in products such as e-readers and personal navigation devices, particularly on the low end of the market, Wong said. But it might make the leap to mainstream gear at some point, he said.

"If it can provide a very attractive cost savings, then you can expect that some of them will probably dabble in it," Wong said.

Also on Tuesday, Smith acknowledged the diminishing returns due from shrinking NAND flash to tighter design geometries. Samsung and other manufacturers make flash chips at about 20 nanometers today, but that is expected to shrink over the next few years. Studies have shown that smaller geometries will slow flash down and cause more errors, though it is expected to remain faster than hard disk drives.

"The physics there are becoming challenging for protecting the integrity of the data," Smith said. To counter that, flash vendors are working on better error correction technologies, including digital signal processors, he said. Demand for that kind of capability drove Apple's recent acquisition of Anobit, Smith said. "2012 is all about that technology. People are trying to differentiate themselves on that."

Stephen Lawson covers mobile, storage and networking technologies for The IDG News Service. Follow Stephen on Twitter at @sdlawsonmedia. Stephen's e-mail address is stephen_lawson@idg.com

Join the Good Gear Guide newsletter!

Error: Please check your email address.

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Stephen Lawson

IDG News Service
Show Comments

Essentials

Lexar® JumpDrive® S57 USB 3.0 flash drive

Learn more >

Microsoft L5V-00027 Sculpt Ergonomic Keyboard Desktop

Learn more >

Mobile

Lexar® JumpDrive® S45 USB 3.0 flash drive 

Learn more >

Exec

HD Pan/Tilt Wi-Fi Camera with Night Vision NC450

Learn more >

Lexar® Professional 1800x microSDHC™/microSDXC™ UHS-II cards 

Learn more >

Audio-Technica ATH-ANC70 Noise Cancelling Headphones

Learn more >

Lexar® JumpDrive® C20c USB Type-C flash drive 

Learn more >

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest News Articles

Resources

PCW Evaluation Team

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Ed Dawson

HP OfficeJet Pro 8730

As a freelance writer who is always on the go, I like my technology to be both efficient and effective so I can do my job well. The HP OfficeJet Pro 8730 Inkjet Printer ticks all the boxes in terms of form factor, performance and user interface.

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Aysha Strobbe

Windows 10 / HP Spectre x360

Ultimately, I think the Windows 10 environment is excellent for me as it caters for so many different uses. The inclusion of the Xbox app is also great for when you need some downtime too!

Mark Escubio

Windows 10 / Lenovo Yoga 910

For me, the Xbox Play Anywhere is a great new feature as it allows you to play your current Xbox games with higher resolutions and better graphics without forking out extra cash for another copy. Although available titles are still scarce, but I’m sure it will grow in time.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?