Although they share the same base material, each grade differs significantly in UV transmission range, bubble/ inclusion content, thermal stability, and purity. Choosing the wrong grade can lead to reduced light efficiency, premature failure in high-temperature environments, or contamination risks in semiconductor processes.

 

This guide provides engineers, optical designers, and procurement teams with a full comparison of JGS1, JGS2, and JGS3, including spectral performance, key properties, industrial applications, and selection recommendations.

 

 

 

 

 

 

Grade Summary

 

- JGS1: Deep UV grade, ultra-high purity, optimized for applications requiring transmission below 220 nm.

- JGS2: Balanced UV transmission grade, ideal for most UV optical and laboratory applications.

- JGS3: General-purpose grade, prioritizes thermal stability over deep UV performance.

 

 

JGS1 (Deep UV Grade)

 

- Key Advantage: The only grade with high transmittance down to 185 nm, making it essential for deep UV lithography and vacuum UV applications.

- Limitation: Higher production cost due to strict purity and bubble control requirements.

 

JGS2 (UV Grade)

 

- Key Advantage: Excellent transmission from 220 nm through visible and near-IR, suitable for UV curing, fluorescence spectroscopy, and most common UV optics.

- Limitation: Poor performance below 220 nm.

 

JGS3 (General Grade)

 

- Key Advantage: Lowest cost, with good thermal shock resistance for high-temperature applications.

- Limitation: Significant absorption below 260 nm, not suitable for most UV optical systems.

 

 

 

 

When to Choose JGS1

 

- Deep UV lithography & semiconductor inspection

- Vacuum UV optical systems

- UV spectroscopy requiring <220 nm transmission

- High-precision optical windows for scientific instruments

 

When to Choose JGS2

 

- UV curing lamps and equipment

- UV sterilization systems

- Laboratory cuvettes and optical cells

- General UV optical components (lenses, windows, filters)

 

When to Choose JGS3

 

- High-temperature furnace tubes and components

- General industrial heating elements

- Non-UV optical applications requiring heat resistance

- Low-cost high-temperature glass parts

 

 

 

 

Mistake 1: Using JGS3 for UV Curing

 

- Problem: Poor UV transmittance leads to low curing efficiency.

- Solution: Upgrade to JGS2 for all UV curing applications.

 

Mistake 2: Using JGS1 for High-Temperature Furnace Tubes

 

- Problem: Unnecessary high cost with no performance benefit.

- Solution: JGS3 is fully sufficient for high-temperature industrial applications.

 

Mistake 3: Choosing JGS2 for Deep UV Lithography

 

- Problem: Inadequate deep UV transmission causes system failure.

- Solution: JGS1 is the only grade suitable for deep UV processes.

 

 

 

 

We offer precision custom quartz glass components in all three grades:

 

- JGS1 deep UV optical windows, lenses, and prisms

- JGS2 UV curing lamps, optical cells, and laboratory components

- JGS3 high-temperature furnace tubes, plates, and industrial parts

- Custom cutting, polishing, and coating services for all grades

 

 

 

 

Q: Which grade is best for UV applications?

A: JGS2 is the standard choice for most UV applications. Choose JGS1 only if you need transmission below 220 nm.

 

Q: Can JGS3 be used for optical applications?

A: JGS3 is not recommended for optical systems due to its poor UV transmittance and higher inclusion levels.

 

Q: What is the main difference between JGS1 and JGS2?

A: The primary difference is the deep UV cutoff. JGS1 transmits down to 185 nm, while JGS2 starts at 220 nm.

 

 

 

Related Articles

 

- Fused Silica vs. Borosilicate Glass: High-Temperature & UV Performance

- Quartz vs. Sapphire: Harsh Environment Material Comparison

- Quartz Glass for Semiconductor Manufacturing

 

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