Electronic fiberglass cloth is one of the most important reinforcement materials in the modern electronics industry. From smartphones and computers to automotive PCBs, aerospace systems, 5G communication equipment, and industrial control boards, electronic-grade fiberglass fabric plays a critical role in insulation, dimensional stability, thermal resistance, and mechanical reinforcement.

Today, electronic fiberglass fabrics such as 7628, 2116, 1080, and 106 styles are widely used in:

• Copper clad laminates (CCL)

• Printed circuit boards (PCB)

• High-frequency communication materials

• Composite laminates

• PTFE coated fabrics

• Aerospace insulation systems

• Industrial FRP reinforcement

This guide explains the major electronic fiberglass cloth specifications, their characteristics, typical applications, differences between models, and how to select the right fiberglass fabric for your project.

What Is Electronic Fiberglass Cloth?

Electronic fiberglass cloth is a woven fabric made from electronic-grade E-glass yarns designed specifically for electrical insulation and PCB laminate manufacturing.

Compared with ordinary fiberglass cloth, electronic-grade fiberglass fabric offers:

• Lower dielectric constant

• Better electrical insulation

• Excellent dimensional stability

• High heat resistance

• Controlled thickness uniformity

• Superior resin compatibility

These fabrics are commonly used as reinforcement materials inside FR4 laminates and multilayer PCB structures.

Why Electronic Fiberglass Cloth Is Important in PCB Manufacturing

Modern electronic products require:

• Smaller circuit sizes

• Higher signal transmission speeds

• Better heat resistance

• Improved dimensional stability

• Lower signal loss

Electronic fiberglass fabric directly affects:

• PCB thickness

• Mechanical strength

• Electrical insulation

• Signal integrity

• Thermal expansion performance

Industry sources note that thinner fiberglass cloth styles such as 106 and 1080 are commonly used in HDI and high-frequency PCB designs, while thicker styles such as 7628 are widely used in industrial and multilayer boards.

Main Types of Electronic Fiberglass Cloth

1. 7628 Fiberglass Cloth

Overview

7628 is one of the most widely used electronic fiberglass cloth specifications in the PCB industry.

Typical characteristics:

• Thick structure

• High mechanical strength

• Excellent dimensional stability

• Strong resin compatibility

• Cost-effective for multilayer boards

Typical thickness is approximately 0.173 mm, with a fabric weight around 200 g/m².

Main Applications

• Multilayer PCB boards

• Industrial control systems

• Automotive electronics

• Copper clad laminates

• PTFE coated fiberglass fabrics

• FRP reinforcement

Advantages

• Excellent strength

• Stable lamination performance

• Good heat resistance

• Widely available globally

Limitations

Due to its relatively thick weave, 7628 may not be ideal for ultra-high-frequency or ultra-thin PCB designs.

2. 2116 Fiberglass Cloth

Overview

2116 fiberglass cloth is considered a balanced specification between thin and thick PCB fiberglass fabrics.

It offers:

• Moderate thickness

• Good dielectric performance

• Strong dimensional stability

• Excellent resin impregnation

Typical thickness is around 0.094 mm.

Main Applications

• Consumer electronics

• Communication equipment

• Mid-layer PCB structures

• Multilayer PCB prepreg systems

• High-performance laminates

Why 2116 Is Popular

Many PCB manufacturers prefer 2116 because it balances:

• Cost

• Mechanical performance

• Electrical stability

• Lamination reliability

Industry sources describe 2116 as a highly versatile electronic fiberglass cloth suitable for general-purpose multilayer boards.

3. 1080 Fiberglass Cloth

Overview

1080 fiberglass cloth is thinner and lighter than 2116 and 7628.

Typical characteristics:

• Lightweight structure

• Lower resin content

• Thin laminate construction

• Improved signal performance

Typical thickness is approximately 0.053 mm.

Main Applications

• HDI PCBs

• High-frequency circuits

• RF communication boards

• 5G equipment

• Thin electronic devices

Advantages

• Suitable for miniaturized electronics

• Better signal transmission

• Lower dielectric variation

• Reduced board thickness

Considerations

Some engineers note that thinner weaves may create resin-rich areas that influence impedance consistency in high-speed PCB applications.

4. 106 Fiberglass Cloth

Overview

106 fiberglass cloth is an ultra-thin electronic fiberglass fabric used in advanced electronic applications.

Its extremely thin structure supports:

• Ultra-light PCB construction

• Fine-line circuitry

• Advanced HDI manufacturing

Main Applications

• Smartphone motherboards

• Precision electronic devices

• Semiconductor packaging

• Advanced communication electronics

Features

• Extremely low thickness

• Lightweight

• Excellent electrical performance

• Suitable for ultra-thin laminates

However, thinner cloth styles generally have lower dimensional stability compared with thicker styles.

5. 7637 / 7630 Fiberglass Cloth

Overview

7637 and 7630 fiberglass fabrics are specialty electronic cloth styles used for:

• PCB laminates

• Composite reinforcement

• Industrial electronic insulation

These styles provide stronger reinforcement and are commonly used in industrial-grade electronic systems.

Common Electronic Fiberglass Cloth Specifications

The PCB industry commonly uses 7628, 2116, and 1080 as the most mainstream electronic fiberglass cloth styles.

Key Characteristics of Electronic Fiberglass Cloth

1. Electrical Insulation

Electronic fiberglass cloth offers excellent dielectric insulation performance, making it ideal for PCB manufacturing and electronic laminates.

2. Heat Resistance

Most electronic-grade E-glass fabrics can withstand temperatures around 550°C.

This makes them suitable for:

• PCB lamination

• High-temperature insulation

• Soldering environments

• Industrial electronics

3. Dimensional Stability

Stable warp and weft structures help prevent:

• PCB warping

• Lamination deformation

• Misalignment during processing

This is essential in multilayer PCB production.

4. Resin Compatibility

Electronic fiberglass cloth is treated with special silane coupling agents to improve bonding with:

• Epoxy resin

• PTFE resin

• Phenolic resin

• Silicone resin

Proper resin compatibility improves:

• Mechanical strength

• Electrical stability

• Long-term durability

5. Fire Resistance

Fiberglass itself is non-combustible and widely used in:

• Fireproof laminates

• Aerospace insulation

• Thermal barriers

• Electrical protection systems

Electronic Fiberglass Cloth Manufacturing Process

The production of electronic-grade fiberglass cloth typically includes:

1. E-glass raw material melting

2. Fiber drawing

3. Yarn twisting

4. Precision weaving

5. Desizing treatment

6. Surface chemical treatment

7. Heat cleaning

8. Quality inspection

9. Packaging

Compared with ordinary industrial fiberglass fabrics, electronic fiberglass cloth requires much tighter:

• Thickness tolerance

• Weave uniformity

• Electrical property control

• Surface cleanliness

How to Choose the Right Electronic Fiberglass Cloth

Choose Based on PCB Structure

Thin HDI Boards

Recommended:

• 106

• 1080

Standard Consumer Electronics

Recommended:

• 2116

Industrial & Multilayer Boards

Recommended:

• 7628

• 7630

Choose Based on Frequency Requirements

High-frequency PCB systems require:

• Lower dielectric variation

• Better weave uniformity

• Lower signal loss

Engineers often prefer thinner and tighter weave structures for RF applications.

Choose Based on Mechanical Strength

For stronger reinforcement:

• 7628

• 7637

• 7630

These styles offer better:

• Tensile strength

• Lamination stability

• Structural support

Electronic Fiberglass Cloth vs Ordinary Fiberglass Cloth

RUISHUN Electronic Fiberglass Fabric Solutions

As a professional fiberglass fabric manufacturer, RUISHUN Materials supplies a wide range of electronic-grade fiberglass fabrics for PCB, insulation, and composite applications.

RUISHUN Main Electronic Fiberglass Products

• 7628 Fiberglass Cloth

• 2116 Fiberglass Cloth

• 1080 Fiberglass Cloth

• Electronic Grade E-Glass Fabric

• PTFE Compatible Fiberglass Cloth

• Silicone Coated Fiberglass Fabric

• High Silica Fabric

• Quartz Fiber Fabric

• PCB Reinforcement Fiberglass Cloth

Why Choose RUISHUN as Your Fiberglass Fabric Supplier

1. Stable Quality Control

RUISHUN focuses on:

• Uniform weave structure

• Controlled thickness tolerance

• Stable resin compatibility

• Consistent electrical performance

2. Custom Manufacturing Capability

The company supports:

• Customized widths

• OEM packaging

• Surface treatments

• Coating solutions

• Industrial-grade composite fabrics

3. Export Experience

RUISHUN supplies fiberglass fabrics to:

• Southeast Asia

• Europe

• India

• Middle East

• South America

• North America

4. Wide Product Portfolio

Unlike many suppliers that only produce standard PCB cloth, RUISHUN also provides:

• Fireproof fiberglass fabric

• Silicone coated cloth

• Welding blankets

• High silica cloth

• Quartz fiber fabrics

• Thermal insulation materials

Future Trends of Electronic Fiberglass Cloth

As industries continue moving toward:

• AI electronics

• 5G communication

• EV vehicles

• Aerospace systems

• High-speed servers

• Ultra-thin electronic devices

Demand for advanced electronic fiberglass cloth will continue growing.

The industry is trending toward:

• Lower dielectric fabrics

• Ultra-thin fiberglass cloth

• High-frequency compatible materials

• Improved dimensional stability

• High-performance prepreg systems

Conclusion

Electronic fiberglass cloth is one of the core materials behind modern electronics and PCB manufacturing. Different fiberglass cloth styles such as 106, 1080, 2116, and 7628 each offer unique advantages in:

• Thickness

• Mechanical strength

• Electrical performance

• Signal stability

• Lamination capability

Choosing the correct fiberglass cloth specification can significantly improve PCB reliability, signal integrity, thermal resistance, and manufacturing efficiency.

As an experienced fiberglass fabric manufacturer, RUISHUN Materials provides high-quality electronic fiberglass fabrics and customized industrial fiberglass solutions for global customers. Whether you need PCB-grade fiberglass cloth, PTFE-compatible fabrics, or high-temperature insulation materials, RUISHUN can provide reliable and cost-effective solutions for your projects.