A8 ss castiecar news, June 24, 1981

Officially opens

Cominco's new gallium ar-
senide production plant: was

officially opened last ‘Thurs-°

day by Dr. P.L.. McGeéer,
B.C.'s minister of univer-
sities, science and communi-
cations.

Dr, McGeer presided over
the pulling of a gallium ar-
senide crystal from newly:
installed erystal-growing
equipment with Cominco's
A.V. Marcolin, group vice-
president in Trail. The end
product from the crystal is
polished wafers of the semi-
conductor compound, which
are sold to manufacturers of
electronic devices,

The gallium arsenide plant
is the newest unit in Comin-
co's electronic materials op-
eration at Trail. This high
technology manufacturing
group now employs 90 people
and produces more than 200
specialized materials used in
the manufacture of industrial
and commercial electronic
equipment.

‘The key equipment in the

gallium arsenide’ plant is a’

highly automated — erystal-
growing furnace. Gallium and
arsenic metal refined at Trail

to better than 99.9999 per .

cent purity are placed in the
growing chamber, which op-
erates at high pressure and
temperature,

The metals form the gal-
lium arsenide compound, and
in a period of about 86 hours
a crystal is grown from the

melt. The crystals are two-to- *

three inches in diameter, and
up to 20 inches in length.
Each crystal is evaluated
to ensure that it meets the
required specification. An
automatic saw then slices the
erystal into wafers half a
millimeter in thickness. The
wafers are polished to a mir-
ror finish and after final
inspection the wafers are

packaged under clean-room
‘conditions. and shipped to
customers, The plant will
employ 12 people.

Gallium arsenide outper-
-forms silicon in certain appli-
cations in electronic circui-

try. It ts also used for light,
-emitting diodes — such as the

digital read-out in clocks and
indicator lights.

Dr. H.E. Hirsch, Cominco’s
manager of” technical re-
search, who is in charge of
electronic materials develop-
ment and production, said
demand for the product is in-
creasing rapidly.

“We are already consid-
ering ‘expansion in this, as
well'as other areas of elec-
tronic’ materials manufac-
ture. We have developed a
high reputation for our tech-
nology inthis industry and
we expect our business will
continue to increase,” he
said.

‘The'invention of the tran-

+ sistor in 1948 broughtabout a

demand for the rare metal,
indium,: This element is a
minute: component of cre
fromthe Sullivan Mine at
Kimberley. Cominco devel-
oped a précess for indium
recovery at its Trail research
centre and began producing
the metal in 1949,

From this early supply of
indium for transistors, the
company's electronic mater-
ials capability has expanded
and diversified, It iss managed
and’ operated by Cominco's

techi research group,
which has expertise in mat-
erials science and processing,
advanced analytical methods
such as. X-ray topography,
seanning electron microscope
and other fields.

‘The range of more than 200
products-now includes 17
metals of sophisticated pur-
ity, some ocntaining less than

PROTECTIVE CLOTHING is being worn

pe
ag,

rn E. Hirsch. Cominco’s sreduation of

here by Dr. P. L. McGeer, B.C.’s © electronic materials at Trail now em-

_ Minister of Universities, Sclence cand
Communications, as he stands holdin
newly-pulled crystal of gollim arseni
With him are, left, Cominco’s B.C. group

vice-president A. V. Marcolin and, right, product.
Cominco technical research manager Dr.

one part per billion of specific
impurities, and an increasing
number of semi-conductor
compounds. The products are
of various grades and forms
to meet rigid customer spec-
ifications,

Dr. Hirsch said the Trail-
produced materials are used
in integrated circuits, solid
state rectifiers, transistors,
diodes, infrared detectors,
light emitting diodes and
other basic electronic com-
ponents.

“We are proud of the fact
that electronic materials
made in Trail have been to
the moon and back,” he said.

he than 200 pri
le.

loys 90 people making a range of more
than foducts. Gallium ‘arsenide, -
used in making microcircuit chips and
Mght-emitting. devices, is the newest

Thanks supporters

supported our Sports Day in
South Slocan last Sunday.
To the 1,200 or so people

-who came, participated, and

enjoyed, To the weather man
who co-operated for a
change. And to everyone who
worked long hours to make
the day the big success it
was, Thanks,

Your interest in this
unique cultural event makes
it possible for us to continue
our projects, including the
support of our foster child in
El Salvador, scholarships,
etc. *

i WwEL

“CDF So

Hav)

COME To TOYE; NDI

‘Beach Balls, ‘Swimming Aids’
rofoam Surf Boards & Rings

“ain ‘the heart of dowatews ceieae”
365-7813

Ph.
cidsep This Sunday. Carl's Drug! OPEN j2to tand bt0 7.

MALCOLM SCOTT

ee
+ 365-245) st

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