For conformal Coatings what is the best wavelength range for optimal stimulation of the fluorescent effect in the conformal coating?

The optical brightener will glow at a wavelength range between 300-400nm. That is what most of the manufacturer of UV lights are specifying in their tubes. However its maximum peaks are at 365nm and 450nm.

Click for further information on Humiseal conformal coatings.

We just sprayed PCBs with UV40 through a selective robotic system. However, we were unable to cure immediately with our UV conveyor and had to wait 3 days whilst the boards were wet. However, they didn’t cure? Why does the UV40 secondary cure mechanism state 2-3 hours pot life?We only had them in light for a short period and they were stored in dark drying cabinets most of the time.

Humiseal UV40 is more sensitive to light than moisture and that is why after 3 days it was still not cured. Also, the humidity level in the drying cabinet was probably quite low. The catalyst in the UV40 should not degrade with time.

The Humiseal UV40 TDS states 2 to 3 hours of pot life if for example you have a dip tank full of UV40 exposed completely to light and moisture. When the viscosity of a conformal coating is increasing by double of its initial value then the pot life has been reached. This is the definition of the pot life. It would still be dippable but you will not have the same consistency (film thickness, homogeneity, etc…)

Click for further information on Humiseal UV4o conformal coating.

Conformal Coating Service List of Materials published

The subcontract conformal coating service at SCH uses many materials including conformal coatings, masking mateirals and cleaning fluids. For convenience, these materials are listed below:

Manufacturer	Conformal Coating Material Code	Manufacturer	Conformal Coating Material Code
Acota	Certonal FC-722 Conformal Coating	Humiseal	1B31LOC Conformal Coating
Acota	Certonal FC-732 Conformal Coating	Humiseal	1B31EPA Conformal Coating
Acota	Certonal FC-746 Conformal Coating	Humiseal	1B73 Conformal Coating
Dow Corning	1953 Conformal coating	Humiseal	1B73EPA Conformal Coating
Dow Corning	2577 Conformal coating	Humiseal	1B18 Conformal Coating
Electrolube	HPA Conformal Coating	Humiseal	1R32 Conformal Coating
Electrolube	DCA SCC3 Conformal Coating	Humiseal	1R32A Conformal Coating
Electrolube	UAT Conformal Coating Thinners	Humiseal	1R32A-2 Conformal Coating
Electrolube	DCT SCC3 Coating Thinners	Humiseal	1H20 AR1 Conformal Coating
Electrofuge	200 Conformal Coating	Humiseal	1H20 AR3 Conformal Coating
Electrofuge	KF1280 Conformal Coating	Humiseal	1H20 UR5 Conformal Coating
Peters	TWIN-CURE DSL 1600 E-FLZ	Humiseal	1A33 Conformal Coating
Peters	ELPEGUARD® SL 1307 FLZ	Humiseal	1A33LOC Conformal Coating
Dymax	9481 Conformal Coating	Humiseal	1B31 Conformal Coating
Dymax	984-LVUF Conformal Coating	Humiseal	1C49 Conformal Coating
		Humiseal	1C49LV Conformal Coating
		Humiseal	1C51 Conformal Coating
		Humiseal	1C53 Conformal Coating
		Humiseal	1C55 Conformal Coating
		Humiseal	UV40 Conformal Coating
		Humiseal	UV40 Gel conformal Coating

Click here for further infomation including TDS and MSDS for the above conformal coatings used in SCH conformal coating service.

Using Conformal coatings to improve printed circuit board reliability

The use of conformal coating to improve printed circuit board reliability is a known process. Application by brush, dip, spray or selective method increases the long term performance of the printed circuit board.

Click http://www.conformalcoating.co.uk/technicalbulletins.php for further information.

Conformal Coating Printed Circuit Boards (PCBs)

Conformal coating printed circuit boards (PCBs) correctly using SCH Technologies Technical Libray. The reliability of printed circuit boards can be improved easily using conformal coatings applied using conformal coating equipment.

Click http://www.conformalcoating.co.uk/technicalbulletins.php for further information.

Aeroqual solvent monitoring removes headache from Conformal coating process

Monitoring solvents with the Aeroqual range of Exposure Monitors affords early detection of the presence of unwanted and harmful solvent emissions in the workplace such as conformal coating fumes.

A range of options is available, to suit every requirement, from single workstation to multiple lines. SCH can offer help and support in ensuring you meet your health & safety obligations when using solvent based conformal coatings.

Solvent Exposure Monitoring and Testing

Aeroqual manufactures a wide variety of application specific gas sensors and sensor modules. These are all designed for use in ambient air and are capable of measuring a range of different gases.

Volatile Organic Compounds (VOC) Detection

The sensor can be used for a wide variety of volatile organic compounds including solventsand gases from conformal coatings with particular sensitivity toward oxygenated hydrocarbon compounds.

Click here for Aeroqual details.

 

Ex-demo and reconditioned conformal coating equipment

SCH have ex-demo and reconditioned conformal coating equipment including a PVA spray conformal coating robot, conformal coating spray booth, conformal coating drying cabinet and a UV curing conveyor for cure of UV conformal coatings and other UV cure materials.

Spray Conformal Coating successfully

Spraying Conformal Coating

SCH provide Technical Bulletins, training and FAQs on the full range of issues regarding conformal coating spraying.

The FAQs target issues such as how to spray PCBs with coating without ruining the board being spraying onto meeting ESD requirements and How to set up a conformal coating spray facility?

SCH also have a dedicated training room where techniques for conformal coating spraying can be taught.

Using this facility candidates get complete hands-on experience with the systems and processes without disturbance to production with a full range of systems available to ensure the best learning environment.

Conformal coating systems in the training facility include UV conformal coating curing, conformal coating dip, conformal coating spraying, manual conformal coating inspection and the new ACCIS Automated Conformal Coating Inspection System. Further, processes such as viscosity measurement, masking, de-masking, coating thickness measurement and solvent exposure monitoring can all be undertaken to give the maximum experience to the candidate.

Conformal coating spray application is one of the widest used methods in the electronics industry. Methods include conformal coating aerosols, spray booths and selective spray robots.

Conformal Coating Aerosols are suitable for very low volume application where invsetment in equipment is prohibitve. Conformal Coating Spray booths become economic when volume use of aerosols reach > 10 aerosols per month giving a return on investment relatively quickly. Selective spray robots may become cost effective where volume is high and detailed and compelx masking is required.

 Click for further information.

UV curing of conformal coating using UV100 conveyors

UV curing of conformal coatings is becoming increasingly important for high volume users in fields such as automotive and consumer electronics.

This increase in the popularity of UV curable conformal coatings is due to its rapid cure speed, level of processing ease, environmental friendliness and thermal cycling resistance, which have never before been achieved with UV conformal coating materials.

The UV100 UV Curing Conveyor System

The super fast curing times of UV conformal coatings mean that productivity in your conformal coating process can be massively increased.

This means you won’t have wet boards lying around susceptible to contamination from dust and debris, your lead times can be reduced and your customers get their products quicker!

To take advantage of these benefits you need a UV curing system like the UV100 UV conveyor. The UV100 range of UV conveyors are available in modular format:

Various cure widths available (standard 300mm width)

Modular Microwave or Arc lamp technologies available

Benchtop or floor standing conveyors

inline or SMEMA with belt, chain or pin edge conveyor

stainless steel or powder coated framwork

Click here for further information on the UV100 conveyor

Solvent monitoring of Conformal coating

The SEA range of Exposure Monitors for providing early detection of the presence of unwanted and harmful solvent emissions in the workplace such as conformal coating fumes.

A range of options is available, to suit every requirement, from single workstation to multiple lines. SCH can offer help and support in ensuring you meet your health & safety obligations when using solvent based conformal coatings.

Solvent Exposure Monitoring and Testing

Aeroqual manufactures a wide variety of application specific gas sensors and sensor modules. These are all designed for use in ambient air and are capable of measuring a range of different gases.

Volatile Organic Compounds (VOC) Detection

The sensor can be used for a wide variety of volatile organic compounds including solventsand gases from conformal coatings with particular sensitivity toward oxygenated hydrocarbon compounds.

Aeroqual Technology

Aeroqual uses an exclusive Gas Sensitive Semi-conductor (GSS) sensor technology that provides a quick response, long life, wide operating temperatures and excellent sensitivity.

Click for further info on Aeroqual.