PROBIMER®77-11 / 9200 / HARDENER 77-11 / 9201

• Very low halogen content level
• Outstanding resistance to electroless and electrolytic nickel and gold plating and other electrical, physical and mechanical properties.
• Excellent resolution, allowing precise reproduction of the photographic master.
• Very low exposure energy is needed and therefore shorter exposure time, high exposure production output.
• Non-tacky coating surface to even very warm exposure frame in virtue of its short exposure time.
• Fulfills the most stringent requirements for electrical corrosion resistance, outstanding moisture and
• Insulation resistance performance.

Process Recommendations

Requirements for Working Environment

In order to reach best results with this product, the following requirements should be maintained:

• Room Temperature: 24 ± 1°C (75.2 ± 1°F)
• Relative Humidity: 50 ± 5%
• Clean room: Class 100,000
• Overpressure Clean room: + 3 mm WS
• UV blocked light

Mixing

Thoroughly mix the two components for 10-15 minutes. Mixing should be done with gentle mechanical stirring. High shear mixing must be avoided in order to prevent entrapment of large amounts of air, which can cause bubbles and poor levelling of the printed coating.

Viscosity is then adjusted with the diluent 1-Methoxy-2-propyl acetate (PMA), CAS Nr.107-98-2.

Pot Life

At room temperature, the ready-to-use mixture has a pot life of 3 days (Definition of pot life is related to increased dwell time in developer.

Pre-Cleaning

For a good adhesion of the lacquer we recommend chemical and/or mechanical pre-cleaning. Hold times prior to coating have to be minimized, since oxidation may impair the adhesion of the lacquer. Only completely dried boards should be coated, this has to be ensured especially for boards with small holes (microvia technology).

Coating

Probimer^® 77-11/9200 electrostatic spray system may be applied with any electrostatic spray method. The recommended coater is the Kansai Paint U-coater.

¹⁾ Higher wet thickness can be achieved if the respective processing parameters, e.g. drying time are adjusted.

Drying

Probimer^® 77-11/9200 offers a wide drying window of 80-90°C (176-194°F) between 20-40 minutes.

Exposure

PROBIMER®77-11 / 9200 electrostatic spray coating system has a spectral absorption between 350 and 420 nm. Good vacuum during exposure will ensure best resolution.

¹⁾ Exposure energy is measured by ORC UV meter

Developing

The areas of unexposed PROBIMER®77-11 / 9200 lacquer should be developed in a continuous spray developing line. Developing is carried out in a 0.8-1.2 % aqueous alkaline solution.

Inspection and Stripping

In case of mishandling during exposure, such as misregistration, boards can be stripped at 50°C (122°F) with 10% NaOH solution.

Final Curing

Thermal curing is required to ensure optimal properties in the cured film. It can be done in a standard convection oven.

After curing PROBINER^® lacquers exhibit extremely high chemical resistance and, thus, cannot be easily removed without damaging the board.

UV-Curing

After thermal curing, we recommend UV curing of 1000-2000 mJ/cm² for increased chemical resistance.

Legend Inks and Conformal Coatings

• In general, legend inks and conformal coatings exhibit well to excellent adhesion to boards coated with PROBIMER®77-11 / 9200.
• However, due to the large variety of available products preliminary trials are strongly recommended.

Production Release Trials

• A variety of flow agents, soldering machines and soldering techniques as well as cleaning processes are used to mount components on circuit boards.
• Adjustment of the processing parameters and design guidelines to ensure optimal use of solder masks leads to the best overall results.
• Users should carry out their own tests prior to release for production runs.

• Eyes and skin: Flush eyes with water for 15 minutes.
• Contact a physician if irritation persists. Wash skin thoroughly with soap and water.
• Remove and wash contaminated clothing before reuse.
• Inhalation: Remove subject to fresh air.
• Swallowing: Dilute by giving water to drink and contact a physician promptly. Never give anything to drink to an unconscious person.
• Keep out of reach of children

Probimer® lacquers are complex chemical compounds. To ensure that these products exhibit consistent quality in application we recommend to store them under the following conditions:

• PROBIMER®77-11 / 9200 in original container at 5-25°C
• HARDENER 77-11 / 9201 in original containers at 5-25°C
• Under EXP on the package label, the expiry date is indicated. Within this period the product should be used.