It is a remarkable
historical fact that Bell Labs did not
invent the microchip, despite having developed almost
all the underlying technology that went into it. This
puzzling failure can be attributed partly to market
forces—or the lack of them. As former Bell Labs
President Ian Ross once explained in an interview, the
Labs focused on developing robust, discrete devices that
would enjoy 40-year lifetimes in the Bell System, not
integrated circuits. Indeed, the main customers for
microchips were military procurement officers, who,
especially after Sputnik, were willing to cough up more
than US $100 a chip for this ultralightweight circuitry.
But the telephone company had little need for such
exotica. “The weight of the central switching stations
was not a big concern at AT&T,” quipped Ross, who
back in 1956 had himself fashioned a precursor of the microchip.
Ultimately, though, the company would need integrated
circuits. Think of the Bell System as the world’s
largest computer, with both analog and digital
functions. Its central offices put truly prodigious
demands on memory and processing power, both of which
could be best supplied by microchips. And it was
microchips driven by software that eventually made
electronic switching a real success in the 1970s. But by
then AT&T was playing an increasingly desperate
catch-up game in this crucial technology.
Here Morton was partly to blame. He pooh-poohed the
potential of microchips and large-scale integration.
Citing his own version of the “tyranny of numbers,” he
initially argued that the manufacturing yields on
integrated circuits would become unacceptably low as the
number of components on a chip grew. Even though each
chip component—typically a transistor—might be made
with a 99 percent success rate, this number would have
to be multiplied by itself many times, resulting in
abominable yields, he reasoned. Tanenbaum summed up
Morton’s attitude this way: “The more eggs you put in
the chip basket, the more likely it is that you have a
bad one.”
And reliability would suffer, too, or so Morton
thought. Due to his lofty position—he had become a vice
president in 1958—this argument dominated the thinking
at Bell Labs in the early 1960s. “Morton was such a
strong, intimidating leader,” observes Eugene Gordon,
who worked for him then, “that he could make incorrect
decisions and remain unchallenged because of his
aggressive style.” Morton’s previous string of successes
probably contributed to his sense of his own
infallibility.
But his tyranny hypothesis ultimately didn’t hold up.
Failure rates of microchip components are an average
over the entire surface of a silicon wafer. Each wafer
can have unusually bad regions that pull the average
down significantly, while chips in the better regions
have much higher success rates, leading overall to
acceptable yields. It took outsiders from the Sun
Belt—at Fairchild and Texas Instruments—to overthrow
the tyranny and pioneer microchip manufacturing.
Well into the 1960s, Morton continued to drag his feet
on silicon-based chip technology, despite mounting
evidence of its promise. He did not consider it a
sufficiently “adaptive” technology, by which he meant
something that could easily respond to the evolving
needs of the Bell System and gradually incorporate
innovative new materials and techniques as they became
available. The phone company couldn’t use a technology
that was too disruptive, because the systems engineers
at AT&T always had to ensure extreme reliability,
compatibility with existing subsystems, and continuity
of telephone service. “Innovation in such a system,”
Morton declared, “is like getting a heart transplant
while running a 4-minute mile!”
To the dismay of Gordon and others in his division,
Morton squelched efforts at Bell Labs to pursue what the
semiconductor industry began calling large-scale
integration, or LSI, which yielded single silicon chips
containing more than 1000 components. He even derided
people working on LSI as “large-scale idiots,” said one
colleague. Instead, he promoted the idea of hybrid
technology incorporating smaller-scale microchips, which
could be manufactured with higher yields, into
“thin-film” circuits based on metals such as tantalum,
in which resistors and capacitors could be etched more
precisely than was possible in silicon. Morton
championed this approach as the “right scale of
integration,” or RSI—another favorite phrase of his.
It proved to be a bad decision, but Morton was
adamant. Tanenbaum reckons that it cost AT&T two or
three years’ delay in getting microchips into the Bell
System for later versions of electronic switching. Even
then, the phone company had to purchase most of those
chips from other companies instead of making them at
Western Electric. Buying components from outsiders was
something AT&T had tried to avoid before 1968 (when
forced to by a landmark decision by the Federal
Communications Commission), because that made it more
difficult to control their operating characteristics and reliability.
Bell Labs’ focus on robust discrete devices, almost to
the exclusion of microchips, started to dissolve in the
late 1960s. Engineers at Murray Hill and Allentown began
working again on the metal-oxide semiconductor (or MOS)
field-effect transistor, which Bell Labs had pioneered
in the 1950s and then ignored for half a decade—even as
companies like RCA, Fairchild, and others ran with it.
In a MOS field-effect transistor, current flows through
a narrow channel just under the oxide surface layer,
modulated by the voltage on a metal strip above it. As
the number of components per microchip swelled, the
simple geometry and operation of the MOS transistor made
it a better option than the junction transistor.
But Fairchild engineers had already solved most of the
challenging reliability problems of MOS technology in
the mid-1960s, so that company enjoyed a big
technological advantage as the devices began finding
their way into semiconductor memories.
Once again, it had been Morton’s decision back in 1961
not to pursue the development of MOS devices, in part
because they initially exhibited poor reliability and
didn’t work at high frequencies. As Anderson recalled,
“Morton, who was ever alert to spot a technology loser
as well as a winner, was thoroughly convinced of the
inherent unreliability of surface devices, as well
as…that field-effect devices would be limited to low
frequencies.” In the early 1960s, they indeed made
little sense for a company already heavily committed to
electronic switching based on discrete devices. But when
Bell Labs and AT&T began embracing MOS transistors
later that decade, they were once again playing catch-up
[see “The End of AT&T,” Spectrum, July 2005].
His dim view of
microchips didn’t prevent Morton from being
showered with accolades from the mid-1960s onward. In
1965, he received the prestigious David Sarnoff Medal of
the IEEE for “outstanding leadership and contributions
to the development and understanding of solid-state
electron devices.” Two years later, he was among the
first people to be inducted into the U.S. National
Academy of Engineering. In 1971, Morton published an
insightful book, Organizing for
Innovation, which espoused his “ecological,”
systems approach to managing a high-tech R&D
enterprise like Bell Labs. In it, he expounded at length
on his ideas about adaptive technology and the right
scale of integration. Morton was also in demand as a
keynote speaker at industry meetings and as a
consultant—especially to emerging Japanese electronics
and semiconductor companies, where his word was revered.
But there was a dark side to Morton’s personality that
few of his Bell Labs colleagues ever glimpsed at work.
He had a serious drinking problem, probably exacerbated
by his frustration at his stagnation within the Bell
Labs hierarchy. Sharing drinks with Gordon one evening,
Morton confided his disappointment that he was still
only a vice president after more than a dozen years at
that level. Ambitious and aggressive, he yearned for the
role of chief executive. Morton also had difficulties at
home, and he began spending more evenings at the
Neshanic Inn, a local hangout about a mile from where he
lived.
Sparks vividly remembers how he was playing golf with
Bell Labs president James Fisk that balmy Saturday
morning in December 1971 when an anxious messenger
rushed out onto the course to give them the tragic news
of Morton’s death. Ashen-faced, Fisk asked Sparks to
check into what had happened. Sparks went to the
hospital where the autopsy was being performed. The
doctor told Sparks that Morton’s lungs were singed,
indicating he was still alive and breathing when the
fire was ignited.
Details of what happened that fateful night came out
at the murder trials of the two men, Henry Molka and
Freddie Cisson, which occurred the following fall at the
Somerset County Courthouse, in Somerville, N.J.
According to prosecutor Leonard Arnold, Morton had just
returned from a business trip to Europe and was driving
back from the airport when he decided to stop by the inn
for a drink. But it was nearly closing time, and the
bartender refused to serve him. Molka and Cisson told
Morton they had a bottle in their car and offered to
pour him a drink. They walked out with him to the
parking lot and mugged him there, pocketing all of $30.
Gordon figures they thought Morton an easy mark, a
well-dressed man in his late 50s with a showy gold
watch. But they were mistaken. Morton kept himself in
good physical condition and, given his aggressive
disposition, probably fought back. A violent struggle
must have ensued. After knocking him unconscious, Molka
and Cisson threw him in the back seat of his Volvo,
drove it a block down the road, and set it on fire with
gasoline they extracted from its fuel-injection system.
The two men were convicted of first-degree murder and
sentenced to life imprisonment, but according to Arnold,
they served only 18 years.
Sadly, the world had
lost one of the leading proponents of
semiconductor technology, the articulate, visionary
engineer who turned promising science into the extremely
useful, reliable products that were already
revolutionizing modern life by the time of his death.
Under Morton’s leadership as head of electronics
technology at Bell Labs, many other innovative devices
were invented that today are ubiquitous in everyday
life, including flash memory and the charge-coupled
device, both derived from MOS technology. But like the
microchip and the MOS transistor, they would be
developed and marketed by other companies.
“Jack just loved new ideas,” said Willard Boyle, one
of the CCD’s inventors. “That’s what fascinated him,
where he got his kicks.” That attitude is probably an
important part of the reason that Bell Labs served as
such a fount of innovative technologies under his
stewardship. But AT&T could realistically pursue
only a fraction of these intriguing possibilities, so
the Labs focused mainly on the discrete devices and
circuits that Morton and other managers considered
useful in implementing their immediate, pressing goal of
electronic switching. Viewed in that context, the
decision to pass on yet another revolutionary, but
unproven, technology made good business sense—at least
in the short run.
Thus, another, more subtle tyranny of numbers was at
work here. Given the seemingly infinite paths that
AT&T could follow—and the legal constraints on
what it could actually make and sell—it was probably
inevitable that outsiders would eventually bring these
disruptive new technologies to the masses.