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- Failures Caused by the Printed Board 1.1 Poor Bonding:
- Surface treatment of printed boards is critical for achieving good bonding.
- Different treatment methods are required based on material characteristics.
1.2 Inaccurate Image Printing Position: - Inconsistent material shape and excessive shrinkage can lead to inaccuracies.
- Temperature and humidity changes can affect printing accuracy, especially with flexible materials like plastic film.
1.3 Precision Graphics Printing: - Strict requirements for screen frame structure, screen stretching, material properties, screen printing machine, and environmental factors.
- General Faults and Remedies for Manual Screen Printing
- Understand the properties of the printed board material prior to printing.
- Thoroughly inspect the screen and ensure it is free from any printing material.
- Clean the screen plate with solvent after printing to prevent hole blocking.
- Avoid using resin tape for screen attachment to prevent screen shrinkage and graphic size errors.
- If tape must be used, position it away from the graphics to avoid spots during printing.
- Regularly check for foreign matter in the printing material and remove it before printing.
- Clean and rotate the squeegee to prolong its service life and maintain good printability.
- Inspect and grind the scraper if it is worn or chipped during screen printing.
