54 DESIGN007 MAGAZINE I SEPTEMBER 2019
Trouble in Your Tank: Moving Into
Microvias, Part 4 E
Copper deposit in the vias with electroless cop-
per or alternatives, such as carbon-based di-
rect plate processes to the vias, depends on
process control, equipment design, and chemi-
cal parameters. When these are not in control,
defects arise. In this installment of the column
series, Mike Carano discusses metallization for
HDI blind via processing.
Nano Dimention Details New
DragonFly LDM E
Dan Feinberg talks with Nano Dimension CEO
Amit Dror about the new DragonFly LDM 3D
printer technology announced by the Israeli
company on July 24, 2019, aimed at increas-
ing machine uptime and moving forward from
prototyping to higher production volumes.
Pollution Prevention Techniques:
Rinse Water Reduction E
The first step in any pollution prevention strat-
egy is to minimize chemical wastes and their
rinse waters. There are five general categories
of common techniques for pollution prevention
in a PCB fabrication facility: (1) new processes
to replace sources of pollution; (2) extend the
bath's life; (3) rinse water reduction; (4) dra
-
gout reduction; and (5) ventilation reduction.
The PCB Norsemen: Avoid Failures in PCB
Production With Compliance Control E
Failures and reliability in the printed circuit in-
dustry are usually considered in the context of
quality claims and non-conformity. This is a
logical approach; however, there is a new con-
text where these aspects are under close scru-
tiny, namely compliance—especially in the de-
fense industry.
Testing Todd: What Do You Mean
'Passed' Isn't Enough? E
From a reliability standpoint, we need to quick-
ly assess what risk we may have uncovered
when faults are detected during electrical test
(ET). "Passed" is not always passed. We must
be diligent to scrutinize the failures found dur-
ing routine ET as a high yield may not indicate
high reliability.
Better to Light a Candle: Chapter Four—
Next Steps for Developing the Future
Workforce E
This fourth installment of Marc Carter's col-
umn series provides an update on repeat (and
perhaps even expanded) classes at Michi-
gan Tech and reports on developing contacts
at other prospective university, industry, and
government nodes for similar efforts to ensure
basic printed circuit technology familiarity of
college graduates over the next few years.
TTM Technologies Unveils Executive
Transition E
TTM Technologies Inc. has announced that
Catherine Gridley will be joining the TTM ex-
ecutive team on September 3 as incoming se-
nior vice president and president of the aero-
space and defense/specialty (A&D) business
unit (BU) and will formally assume the A&D
leadership role on January 1, 2020.
How to Feed Test Data Back to Engineering
for Process Improvement E
Some people think of the PCB manufacturing
process as a black box: design data goes to the
manufacturer (fabrication house), and magically,
the finished PCB is produced. While it may have
been like that in the past, in actuality, fabricating
PCBs today is quite a ballet of processes.
