MARCH 2019 I DESIGN007 MAGAZINE 69
• September 10–13: Kirkland, WA
• September 19–22: Schaumburg, IL
• October 21–24: Anaheim, CA
• November 2–5: Raleigh, NC
• December 3–6: Manchester, NH
Note: Dates and locations are subject to
change. Contact EPTAC Corporation to check cur-
rent dates and availability. A minimum enroll-
ment of seven students is required for a class to
be held.
PCB Design Events
PCB2Day
• Controlling noise, EMI, and signal integrity
in high-speed circuits and PCBs
• April 17–18: Seattle, WA
• June 13–14: Boston (Chelmsford), MA
• pcb2day.com
Realize LIVE
• June 10–13, 2019: Detroit, MI
• Realize LIVE
PCB West 2019
• September 9–11: Santa Clara, CA
• pcbwest.com
The Future
Next month, we will resume individual
chapter spotlights and review feedback from
the IPC DC Executive Board.
IPC DC
The IPC Designers Council is an international
network of designers. Its mission is to pro-
mote printed circuit board design as a profes-
sion and to encourage, facilitate, and promote
the exchange of information and integration
of new design concepts through communica-
tions, seminars, workshops, and professional
certification through a network of local chap-
ters.
DESIGN007
References
1. IPC—Association Connecting Electronics Industries.
"Introduction to Printed Circuit Board (PCB) Design."
Stephen Chavez is a member of
the IPC Designers Council Executive
Board and chairman of the com-
munications subcommittee. To read
past columns or contact Chavez,
click here.
pulses of less than one trillionth of a second, researchers at
Ames Laboratory were able to successfully isolate and con-
trol the surface properties of a bismuth-selenium (Bi2Se3)
3D topological insulator. The method provides what is es-
sentially a new "tuning knob" for controlling the protected
surface conductivity in this category of materials.
"We believe that this study could evolve into a bench-
mark method of characterizing and manipulating these
materials, so they can be better understood and adapt-
ed for applications in new quantum technologies," said
Jigang Wang, Ames Laboratory physicist and Iowa State
University professor.
The research is published in
Nature Communications.
(Source: Ames Laboratory)
Scientists at the U.S. Department of Energy's Ames Lab-
oratory have discovered a means of controlling the sur-
face conductivity of a 3D topological insulator—a type of
material that has potential applications in spintronic de-
vices and quantum computing.
Also, 3D topological insulators are emerging materi-
als that hold great promise due to their unique electron
conducting states on their surfaces, which is immune to
backscattering, versus the bulk interior, which behaves
as a normal insulator. But a challenge remains in under
-
pinning and selectively controlling their high-frequency
transport at the surface without an increased scattering
from the bulk material.
By employing ultra-short mid-infrared and terahertz
Laser Pulses Light the Way to Tuning Topological
Materials for Spintronics and Quantum Computing
