tag: RC delay

How To Reduce Timing Closure Headaches
By Kurt Shuler - 22 Dec, 2015 - Comments: 0

As chips have become more complex, timing closure has provided some of the most vexing challenges facing design engineers today. This step requires an increasing amount of time to complete and adds significantly to design costs and back-end schedule risks. Wire delay dominates transistor switching delay Building high-performance modern CPUs involves pipelining to achieve high frequencies. I... » read more

Rethinking Memory
By Ed Sperling - 16 Dec, 2015 - Comments: 3

Getting data in and out of memory is as important as the speed and efficiency of a processor, but for years design teams managed to skirt the issue because it was quicker, easier and less expensive to boost processor clock frequencies with a brute-force approach. That worked well enough prior to 90nm, and adding more cores at lower clock speeds filled the gap starting at 65nm. After that, th... » read more

New Options For Power
By Ed Sperling - 10 Sep, 2015 - Comments: 0

Chipmakers have been talking for years about the next big breakthrough in battery technology, low-power architectures and energy harvesting. So far, none of them has made their job any easier. Batteries empty out too quickly, and the technology for improving the amount of energy that can be stored don't improve fast enough—or safely enough when they do show big improvements—to make a big... » read more

Power Breaks Everything
By Ed Sperling - 15 Jul, 2015 - Comments: 2

The emphasis on lowering power in everything from wearable electronics to data centers is turning into a perfect storm for the semiconductor ecosystem. Existing methodologies need to be fixed, techniques need to be improved, and expectations need to be adjusted. And even then the problems won't go away. In the past, most issues involving power—notably current leakage, physical effects such... » read more

More Problems Ahead
By Ed Sperling - 10 Sep, 2014 - Comments: 0

Semiconductor Engineering sat down to discuss future scaling problems with Lars Liebmann, a fellow at IBM; Adam Brand, managing director of transistor technology at Applied Materials; Karim Arabi, vice president of engineering at Qualcomm; and Srinivas Banna, a fellow for advanced technology architecture at GlobalFoundries. SE: Where are the most severe issues these days? Is it on the design... » read more

Will 7nm And 5nm Really Happen?
By Mark LaPedus - 14 Jul, 2014 - Comments: 2

Today’s silicon-based finFETs could run out of steam at 10nm. If or when chipmakers move beyond 10nm, IC vendors will require a new transistor architecture. III-V finFETs, gate-all-around FETs, quantum well finFETs, SOI finFETs and vertical nanowires are just a few of the future transistor candidates at 7nm and 5nm. Technically, it’s possible to manufacture the transistor portions of the... » read more

Interconnect Challenges Grow
By Mark LaPedus - 20 Feb, 2014 - Comments: 0

Qualcomm outlined the technology challenges facing mobile chip suppliers at a recent event. In no particular order, the challenges include the usual suspects—area scaling, power reduction, performance and cost. Another concern for Qualcomm is an often-overlooked part of the equation—the backend-of-the-line (BEOL). In chip production, the BEOL is where the interconnects are formed within ... » read more

Dealing With New Bottlenecks
By Ed Sperling - 11 Jul, 2013 - Comments: 0

By Ed Sperling While the number of options for improving efficiency and performance in designs continues to increase, the number of challenges in getting chips at advanced process nodes out the door is increasing, too. Thinner wires, routing congestion, more power domains, IP integration and lithography issues are conspiring to make design much more difficult than in the past. So why aren�... » read more

Experts At The Table: The Growing Signoff Headache
By Ed Sperling - 07 Jun, 2013 - Comments: 0

By Ed Sperling Low-Power/High-Performance Engineering sat down to discuss signoff issues with Rob Aitken, an ARM fellow; Sumbal Rafiq, director of engineering at Applied Micro; Ruben Molina, product marketing director for timing signoff at Cadence; Carey Robertson, director of product marketing for Calibre extraction at Mentor Graphics; and Robert Hoogenstryd, director of marketing for design ... » read more

LP Verification
By Ed Sperling - 08 Mar, 2013 - Comments: 0

Functional verification has been a consideration throughout the design flow for the past several process nodes. Low power verification has been more of an afterthought. That’s beginning to change, though, as the challenge of integrating IP blocks and the physical effects of shrinking wires and RC delays in interconnects begin affecting power and performance in designs. What’s becoming cl... » read more

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