# Low Dielectric and Low CTE Glass Fabrics

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Specialty glass fabrics for electronic laminates: low dielectric options for signal performance and L-HDI reinforcement for dimensional stability in advanced IC substrates.

[Discuss your requirements](https://jpscm.com/contact?product=Low%20Dk%20%26%20L-HDI%20Glass)

## Two material needs. Two glass solutions.

JPS weaves specialty glass fabrics for demanding electronics applications. L-glass provides a low-loss reinforcement option, while L-HDI fabric supports the dimensional stability requirements of advanced semiconductor packaging.

## What matters in your laminate

### Dielectric constant (Dk)

A measure of a material’s electrical response that affects signal propagation in electronic laminates.

### Dissipation factor (Df)

A measure of dielectric loss. Consider Df alongside Dk when selecting reinforcement for signal performance.

### Thermal expansion (CTE)

The change in dimensions with temperature. Low CTE reinforcement supports dimensional stability in IC substrates.

### Fabric and resin compatibility

Weave construction, finish, resin system, and processing all contribute to the finished laminate’s performance.

## Select for your electronics application

### Low dielectric glass

L-glass is a low dielectric, low-loss glass reinforcement option for electronic laminates and high-frequency circuit boards. Discuss the intended frequency, resin system, and electrical requirements with JPS.

### L-HDI low CTE glass

L-HDI glass focuses on dimensional stability for advanced IC substrates and semiconductor packaging. AGY and JPS announced their Statesville weaving partnership in February 2026. Contact JPS for current availability and qualification status.

### Constructions and finishes

Request the approved style, finish, width, thickness, and data sheet for your application. JPS can review weaving and finishing requirements with your technical team.

Fiber reference values do not specify JPS fabric or finished laminate performance. L-HDI and low-loss L-glass address different needs; low CTE does not imply lower dielectric loss.

- [Search the fabric directory](https://jpscm.com/fabric-search)
- [Explore our markets](https://jpscm.com/applications)
- [Technical resources](https://jpscm.com/resources)

## More reinforcement fabrics

- [E-Glass & S-2 Glass®](https://jpscm.com/products/e-glass-s-glass)
- [Astroquartz®](https://jpscm.com/products/astroquartz)
- [Para-Aramids](https://jpscm.com/products/para-aramids)
- [UHMWPE](https://jpscm.com/products/uhmwpe)
- [Specialty Fabrics](https://jpscm.com/products/specialty-fabrics)
- [Engineered Substrates](https://jpscm.com/products/substrates)

## Let us design a fabric for you.

Contact JPS to discuss material selection, fabric construction, and finishes.

[Contact JPS](https://jpscm.com/contact?product=Low%20Dk%20%26%20L-HDI%20Glass)

## Weaving guide

### Weaving Guide

An introduction to fabric weaving and reinforcement construction.

Duration: 1:42.

[Watch video (MP4)](https://jpscm.com/videos/weaving-guide.mp4?v=2)