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A cleaning process for electronic equipment using a vacuum drying oven
Vacuum
News
ultimate vacuum, fast pump-down, and virtual elimination of sources of gas bursts. Installation is also much simplified. This efficiency is coupled with zero backstreaming and at least the same freedom from hydrocarbon contamination as turbomolecular pumps for about a third of the cost and with no need for liquid nitrogen trapping. Pumping speed for light gases is significantly faster. The Diffstak’s integral valve contributes to high overall pumping speed by virtue of its high installed conductance and the elimination of associated seals. However, valveless Diffstaks can be supplied on request, typically for use in systems where standard diffusion pump accessories are to be retained. In these cases there will be some reduction in overall system pumping speed due to the impedance of the retained accessories. The range provides air-pumping speeds from 150 I s-l up to 2000 I s-1 and ultimate vacuum for all models of 1.3 x 1 O-10 mbar, achievable without cryo-trapping. Edwards High Vacuum, Manor Royal, Crawley, West Sussex RHIO 2LW, UK
processed in the electronics of the system and triggers a relay when a certain level is reached. The detection limit (depending on the surface area to be tested) is 1 O-3-1 O-4 mbar I s-1, detection time 2-l 0 s, and the maximum surface area which can be tested is 1 m2. Some fields of application include car accessories : testing tyres, inner tubes, petrol tanks, fire extinguishers, etc; the plastic industry : containers, stoppers and plugs, etc ; the cosmetic industry : sprays and atomizers. Balzers High Vacuum Ltd, Northbridge Road, Berkhamsted, Herts, UK
New
Anavac
diagnostic
vacuum
gauge
The latest addition to Anavac’s range of uhv measuring and gas analysis devices is the new Anavac II duadrupole Mass Spectrometer. This new device will give you a cost effective convenient method of dealing with everyday procedures including leak detection and both total and partial pressure measurement and can even give process control facilities when linked with RUl. Clean construction ensures total compatibility with any uhv system, quadrupole heads are interchangeable so that only one controller is necessary for all systems and to ensure trouble-free operation it has a very straightforward construction principle which makes repair and replacement simple. Vacuum Generators Ltd, Menzies Road, Hastings, Sussex TN34 1 YQ, UK
A cleaning process for using a vacuum drying
electronic oven
equipment
Due to the effects of static, heating, cooling and circulation of air electronic equipment becomes dirty and this can lead to malfunction and to eventual breakdown. Periodic cleaning helps to ensure operating efficiency. The Craswell Scientific vacuum ovens illustrated form part of a process used by the Royal Navy for the cleaning of such equipment. In this process the equipment is hand scrub-washed with warm water and solvent to remove dust and dirt and, after a series of rinsings, is transferred to the vacuum oven. The oven chamber is evacuated to a point just below the vapour pressure of water and the chamber heated. In this way the equipment is dried quickly and thoroughly, without risk of detriment even to the most sensitive component. The vacuum ovens have been supplied to the Ministry of Defence for drying, after cleaning, the complex electronic equipment of the Polaris navigation system. The oven is of industrial proportions, 1.2 x 0.9 x 0.46 m, has an ultimate vacuum clean dry and empty of better than 5 mm Hg obtainable within 30 min and a temperature range, with pre-set facility, of 38-82°C. The rotary mechanical vacuum is protected from ingress of water vapour by a refrigerated cold trap which condenses the vapour before it reaches the pump.
The Mark I/ range of Edwards for high vacuum applications number of new features.
Diffstak integrated pumping is now available incorporating
Balzers
leak
dry
operation
systems a
detector
A new leak detector for production testing, the LSA 100, introduced by Balzers, features dry operatien-eliminating the need to pressurize and immerse in liquid the piece to be tested. Tests are carried out at atmospheric pressure ensuring short batch times. Test pieces are filled with a halogen-containing test gas. The sensor will detect any traces of halogen which escape from the test piece and the ionic emission will increase. This current is
These vacuum ovens can also be used for industrial and research applications where metallic and non-metallic components or assemblies are required to be dried after cleaning. There are applications in the electronics, metallurgical, electroplating and chemical industries, etc. where a very high degree of dryness iS required. Craswell Scientific Ltd, High Vacuum Division, Fairview Road, Cheltenham, Glos GL52 2EH UK
Sputtering cement
target
silver-filled
CERAC offers a plastic cement silver-filled epoxy composition.
epoxy
bonding
which consists of a special It is used for making electrical 135
News
ultimate vacuum, fast pump-down, and virtual elimination of sources of gas bursts. Installation is also much simplified. This efficiency is coupled with zero backstreaming and at least the same freedom from hydrocarbon contamination as turbomolecular pumps for about a third of the cost and with no need for liquid nitrogen trapping. Pumping speed for light gases is significantly faster. The Diffstak’s integral valve contributes to high overall pumping speed by virtue of its high installed conductance and the elimination of associated seals. However, valveless Diffstaks can be supplied on request, typically for use in systems where standard diffusion pump accessories are to be retained. In these cases there will be some reduction in overall system pumping speed due to the impedance of the retained accessories. The range provides air-pumping speeds from 150 I s-l up to 2000 I s-1 and ultimate vacuum for all models of 1.3 x 1 O-10 mbar, achievable without cryo-trapping. Edwards High Vacuum, Manor Royal, Crawley, West Sussex RHIO 2LW, UK
processed in the electronics of the system and triggers a relay when a certain level is reached. The detection limit (depending on the surface area to be tested) is 1 O-3-1 O-4 mbar I s-1, detection time 2-l 0 s, and the maximum surface area which can be tested is 1 m2. Some fields of application include car accessories : testing tyres, inner tubes, petrol tanks, fire extinguishers, etc; the plastic industry : containers, stoppers and plugs, etc ; the cosmetic industry : sprays and atomizers. Balzers High Vacuum Ltd, Northbridge Road, Berkhamsted, Herts, UK
New
Anavac
diagnostic
vacuum
gauge
The latest addition to Anavac’s range of uhv measuring and gas analysis devices is the new Anavac II duadrupole Mass Spectrometer. This new device will give you a cost effective convenient method of dealing with everyday procedures including leak detection and both total and partial pressure measurement and can even give process control facilities when linked with RUl. Clean construction ensures total compatibility with any uhv system, quadrupole heads are interchangeable so that only one controller is necessary for all systems and to ensure trouble-free operation it has a very straightforward construction principle which makes repair and replacement simple. Vacuum Generators Ltd, Menzies Road, Hastings, Sussex TN34 1 YQ, UK
A cleaning process for using a vacuum drying
electronic oven
equipment
Due to the effects of static, heating, cooling and circulation of air electronic equipment becomes dirty and this can lead to malfunction and to eventual breakdown. Periodic cleaning helps to ensure operating efficiency. The Craswell Scientific vacuum ovens illustrated form part of a process used by the Royal Navy for the cleaning of such equipment. In this process the equipment is hand scrub-washed with warm water and solvent to remove dust and dirt and, after a series of rinsings, is transferred to the vacuum oven. The oven chamber is evacuated to a point just below the vapour pressure of water and the chamber heated. In this way the equipment is dried quickly and thoroughly, without risk of detriment even to the most sensitive component. The vacuum ovens have been supplied to the Ministry of Defence for drying, after cleaning, the complex electronic equipment of the Polaris navigation system. The oven is of industrial proportions, 1.2 x 0.9 x 0.46 m, has an ultimate vacuum clean dry and empty of better than 5 mm Hg obtainable within 30 min and a temperature range, with pre-set facility, of 38-82°C. The rotary mechanical vacuum is protected from ingress of water vapour by a refrigerated cold trap which condenses the vapour before it reaches the pump.
The Mark I/ range of Edwards for high vacuum applications number of new features.
Diffstak integrated pumping is now available incorporating
Balzers
leak
dry
operation
systems a
detector
A new leak detector for production testing, the LSA 100, introduced by Balzers, features dry operatien-eliminating the need to pressurize and immerse in liquid the piece to be tested. Tests are carried out at atmospheric pressure ensuring short batch times. Test pieces are filled with a halogen-containing test gas. The sensor will detect any traces of halogen which escape from the test piece and the ionic emission will increase. This current is
These vacuum ovens can also be used for industrial and research applications where metallic and non-metallic components or assemblies are required to be dried after cleaning. There are applications in the electronics, metallurgical, electroplating and chemical industries, etc. where a very high degree of dryness iS required. Craswell Scientific Ltd, High Vacuum Division, Fairview Road, Cheltenham, Glos GL52 2EH UK
Sputtering cement
target
silver-filled
CERAC offers a plastic cement silver-filled epoxy composition.
epoxy
bonding
which consists of a special It is used for making electrical 135