Masking Film

• MESH Type

1. Polyester MESH more
2. Nylon MESH more
3. Stainless MESH more

• Application

• Screen mask for PDP, Ceramic, touch screen and Solar battery
• Mask for LCD, OLED and Electro Luminance
• Mask for Packages in semiconductor
• MLB, Stacked printed and hole printing mask
• Mask for backlight
• Filter for optics

• Manufacturing process of Screen Mask

1. Frame cleaning

• Classifying aluminum frames for each company and size, and keeping in frame anchors.
• Removing residual contaminants by wiping the aluminum frame with a solvent.

2. Taking the angle of frame bending

• Putting the frame into surface plates.
• Taking the angle of frame bending before stretching.
• Making a decision whether use it or not.

3. Stretching

• Putting the cleaned frame into a stretcher for the determined angle.
• Fixing MESH into the stretcher after confirming the specifications of MESH.

4. Precleaning

• After stretching finished, doing total check about finished products. (Oil and contaminants, pin hole, MESH defects, etc.)
• Removing contaminants and stains by high pressure cleaning machines

5. Dry

• Drying cleaned MESH under 40℃.

6. Applying photosensitive emulsions

• First of all, checking each companies’ emulsion coating thickness.
• Drying after 1st coating, and confirming 2nd, 3rd, and 4th’s final thickness.
• After coating, ripening for 24 hours.

7. Light exposure

• Removing glass contaminants of a stepper.
• Checking a status of films before light exposing patterns, and confirming the parts of contaminants and defects.
• Providing the amount of light by closing S/MASK into the stepper.
• Working according to each company’s specifications.

8. Development

• After light exposing and rechecking MASK, developing.
• After checking defects, developing again.

9. Dry

• Drying the developed MASK over 1 hour.

10. Inspection (Confirmation of inspection report)

• Inspecting the appearance of the dried MASK. (Frames, pattern parts, emulsion parts)
• After total inspection(contaminants, pin hole, MESH defects) by being attached to a measuring instrument, measuring the sizes.
• Determining defects after checking each partner’s specification.

11. Packaging and shipping

• Packaging the passed MASK by appointed vinyl.
• Shipping.