VG microscopes break the 1 Ångstrom barrier

Vacuum

News

acceptance

by the customers

series of in-depth

evaluation

competitors

Europe

from

of process built-in

equipment

quiet

servicing

control

in favour

After

a

the 1 Angstrom

from several

one of the leading

approach

manufacturers

of this pump.

is expected

It is now

yield

of all lubricants, the patented

aggressive

process

reliabrlity,

especially

design

method

in contact

with

and

of protecting

the

the medium

against

gases was a main deciding

have now

with STEM

of the Z-contrast

been clearly

of images

sub-Angstrom represents

VG Microscopes’

electron

of the pump

The advantages

that the processing

information

confirms

very long mean time

and a very compact

electronics,

‘barrier’.

to this problem

The HB603

such as operational

parts such as rotor and stator

chemically

features.

pumps

in all new etch systems.

by avoidance

between

the entire inner

and Japan

all the usual features

operation

periods

to its excellent involving

has decided

as standard

Besides

owing trials

STEM

demonstrated

and i

such as that shown

here v\

precision.

a major engineering

position

as a world

achievement

leader

an

in innovative

microscopy.

Further

information

from

: Dr P E Bov VG Microscop

factor.

The Birches

lndustnal

Esta

lmberhorne

La1

East Grinste; EXTRUVAC-vacuum the plastics

system

industry

and more importance extruding) finish

and composition

oxygen

the chemical

which

oxygen

or voids

processing,

system

which

3272’

plastification

and

Fax 0342

3005’

surface

causing

defects

in

gases give rise

in the end-product. and quality

IS capable rotary

oil system)

of the material,

essential

to remove

residual

are condensed

the

monomers,

1.36,4

residues

safe and easy disposal.

all these requirements

(closed

step the vapours

are collected

The process

system

produced

cyclone

are absorbed

oil circuit

separating

which

by washing

in the

cannot

be

the gas.

in their concentrated

water

or

on the

by the molten

separator;

gases and vapours

by the process

The separated

vane pump

in a water-cooled

step all condensable

condensed

of meeting

and a two-stage

intake side. In the first process second

1 UB, C

Moreover,

as any humidity,

of an oil lubricated

once-through plastic

RH19 Tel 0342

purity,

West Sussex

etc.

A vacuum consists

In more

high temperatures,

thereby

it is absolutely

from the arr as well

plasticizers

involves

effect,

of the base material.

bubbles

during

degassing. is gaining

concerning

usually

To make the most of the properties especially

kneading,

requirements

have an oxidrzing

structure

to undesirable

with

barrel

degassing

of the end-product.

processing,

and water

of vacuum

(in connection

due to increased

In plastics

for extruder

the method

or the cooling

form for water

I

is not

contaminated. The system

is of a modular

requirements Further

design

of the particular

information

and may be adapted

IOA

to the

process.

:

from

Leybold

London

Ltd

Waterside

Way

Plough

Lane

SW1 7 7AB.

UK

Tel 081 947 9744 Fax 081 947 0210

Z-contrast

STEM

at an instrumental is a column

image of a silicon crystalrecorded magnification

of atoms, viewed

of 20.000.000

end-on.

pairs and appear as dumbbells

on the VG HB6L

times. Each white

The columns

separated

are arranged

by a distance

‘dc in

of 1.36

Angstroms.

VG News VG

Microscopes

resolution, recently group)

the

on its latest model (STEM).

the novel

apart-in

National

factory

Laboratory,

STEM,

images

to obtain

instrument

atomic

uses

spaced

has demonstrated

a point

resolution

materials

of 1.3

wrthout

any computer

atomic

number

structure

current

system

than

which

an equivalent

the ease with simulations

contrast

is umque

to the

images

can be

EVAC chain

of high-tech

clamp

(stainless lubricating.

Inc. A new

is lighter

And because

materials

it never needs

International

in weight

steel and fiberglassThus

it can be used eve

environments. exclusive

advantages

and space-saving now

the strength,

abilty new

dependability,

of the patented BLX CHAIN

goal of high resolution

electron

is a significant microscopy-

east

EVAC clamping CLAMP!

for NW 80, 100 and 125, the BLX makes a quick,

connection

of two

pipes usrng tapered

flanges

and

seals. information

from

: Evac International

In

River Vale Roa River Val

chemical

NJ 07675, of this instrument

ant

it is a unique

215

and the fact that the

and thus yield

elastomer

Inc

EVAC

and you have the exciting,

Further

conventional

which

from

its predecessors.

plastic)

Add to these

Available

including

information. The development

reinforced

vacuum-tight technique,

resolution

microscope,

in cost than

of tightening

for Oak Ridge

international

clamp

of the Swiss-made

in clean-room

crystal.

Important

lower

EVAC chain

combination

resolution

of atoms

from

version

electron

source

‘dumbbells’-pairs

of the Z-contrast

electron

exhibit

transmission

USA, and will be used to study the atomic

are its 35% better

interpreted

technique

News

innovative

Instruments

and superconductors.

The advantages transmission

of the Fisons

test, has been developed

of a range of technologically semiconductors

The highest was obtained

scanning

a silicon

which

during

HB603

the so-called

The microscope, Angstroms

barrier.

ever recorded

(a member

imaging

show

1.36 Angstroms

image

This 300 kV field emission

Z-contrast

which

1 Angstrom

interpretable

by VG Microscopes

microscope images

break

directly

US

step towards

the

Tel (201)

666 855

the

of

Fax (201)

666 847

breaking

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