Conformal Coating

Introduction

Conformal coating is a protective layer applied to printed circuit boards (PCBs) to shield them and their components from environmental damage and corrosion. Typically applied with a thickness of 30-210μm, the coating conforms closely to the shape of the PCB and its components, covering solder joints, exposed leads, traces, and other metalized areas. By enhancing resistance to moisture, pollution, dust, and chemical contaminants, conformal coating helps extend the lifespan of electronic products.

This protective layer plays a critical role in preventing damage from humidity, corrosive substances, contamination, dust, and mechanical stress. It also provides excellent defense against sulfur corrosion, making it an essential technology for applications requiring high reliability. Conformal coating is widely used in industrial hardware for data center networking equipment, IoT devices, automotive systems, and medical applications.

Benefits of Conformal Coating

Conformal coating creates a thin yet durable layer that significantly extends the lifespan of PCBs and electronic components by preventing:

• Environmental damage: Shields against moisture and corrosive chemicals.
• Thermal shock damage: Protects against stress caused by rapid temperature fluctuations.
• Mechanical shock damage: Resists vibrations and external impacts.
  Globally Recognized Materials
  Single-component, translucent, medium-viscosity coating material.
  Cures at room temperature without requiring ovens.
  Forms a tough, abrasion-resistant elastoplastic surface.
  Wide operational temperature range: -45°C to 200°C.
  Complies with UL-94 V-0 flammability standards and international certifications like IPC-CC-830 and MIL-I-46058C.
• Reliable Coating Process
  Our conformal coating process employs automated dispensing systems to ensure consistent and uniform application. Following IPC standards, the process involves:

E-1: Ensuring the coating is transparent, evenly distributed, and adequately covers the PCB and its components. Minor buildup or air bubbles may occur but do not affect functionality or reliability.
E-2: Conducting visual inspections to confirm uniform coverage. Fluorescent coatings can be examined under blacklight, while white light aids in verifying coverage.
E-3: Measuring coating thickness on flat, unobstructed surfaces after curing. Wet film thickness can also be used during the process, provided conversion to dry film thickness is documented.
Through precise application and rigorous quality control, conformal coating delivers enhanced reliability and durability, ensuring electronic products perform consistently even in harsh environments.