Ultra Low Temperature Glass Frit & Paste
One of the few manufacturers globally offering Pb-free, ultra-low temperature glass frit in production-ready quantities.
YEKGLASS manufactures lead-free glass frit powders, pastes, and preforms for low-temperature bonding and hermetic sealing.
Our formulations are customizable in composition, particle size, CTE, and Tg — compatible with glass, metal, and ceramic substrates.
Proven in mass production environments, our materials support screen printing and dispensing processes across OLED, MEMS, and semiconductor packaging applications.
Why YEKGLASS Glass Frit
Our formulations are developed to address the specific demands of each application — from firing temperature and substrate compatibility to printability and long-term sealing integrity.
Low Firing Temperature
Our frit and paste enable secure bonding at low temperatures, protecting sensitive components from thermal damage.
RoHS & REACH Compliant
All our materials are 100% lead-free, fully compliant with RoHS and REACH standards for global environmental safety.
Multiple Forms Available
Choose from powder, paste, or sintered preform formats, depending on your process requirements and equipment.
Tuned for Your Process
We tailor thermal expansion (CTE), glass transition temperature (Tg), and viscosity to perfectly match your specific application.
Typical Applications
Versatile Bonding & Sealing Across High-Tech Industries
YEKGLASS's glass frit and paste solutions are used across a wide range of electronics and photonics applications.
Our materials enable hermetic, low-temperature bonding between dissimilar substrates, ensuring long-term reliability in challenging environments.
Our materials are widely used in hermetic glass sealing, wafer-level bonding, sensor encapsulation, and display panel sealing applications.
| Industry | Application Use Cases |
|---|---|
| OLED / AMOLED | Rigid panel encapsulation, laser-sealed bonding, moisture and oxygen protection |
| MEMS & Sensors | Glass-to-Glass and Glass-to-Ceramic sealing for pressure sensors, etc. |
| Semiconductor Packaging | Wafer-level bonding, cavity sealing, die attach, interposer applications |
| Optoelectronics & LEDs | LED cap and lens sealing, optical window attachment |
| High-Voltage Components | Electrical insulation, PN junction passivation, rectifier sealing with solder glass |
Custom Formulations
Tailored Glass Properties for Process Precision and Material Compatibility
Each formulation is developed based on your substrate material, bonding method, and firing conditions.
Key parameters — including CTE, Tg, particle size, and viscosity — are adjusted to match your specific process requirements.
Commonly bonded substrates include AlN, ZrO₂, SiC, quartz, borosilicate glass, stainless steel, and Kovar.
CTE Matching
Each formulation is engineered with a controlled coefficient of thermal expansion to match bonding substrates such as SUS, ceramics, or other glasses.
Thermal Properties Control
We tailor Tg and Tx values to ensure stable bonding at low firing temperatures and to minimize thermal stress during sealing.
Particle Size Optimization
Our frits are available with custom D50, D90 distributions, ensuring balanced flow, surface uniformity, and adhesion for your application.
Viscosity & Solid Content
Paste formulations are adapted to your equipment, with viscosity and solid loading optimized for screen printing or dispensing.
Our team is here to help you select the optimal model based on your materials, bonding method, and firing conditions.
Send us your requirements and let our specialists provide tailored technical support.
Unsure which glass frit fits your application?
Available Models & Specifications
Our standard formulations cover softening points from 300°C to 700°C and CTE ranges from 40 to 140 × 10⁻⁷/°C, with custom compositions available upon request.
Each model is optimized for specific firing profile, CTE, and processing conditions, ensuring compatibility with substrates such as glass, metal, and ceramics.
Both powder and paste formats are offered, and selected models are also available as preforms upon request.
| Model | Tg(°C) | Tw(°C) | CTE(×10⁻⁷/°C) | Color |
| YPF 002 | 280-300 | 330-350 | 115-125 | Transparent |
| YHF 001 | 560-580 | 650-700 | 40-50 | Transparent |
| 1411 | 260-280 | 360-400 | 70-80 | Light Brown |
| 1318 | 275-285 | 350-390 | 120-130 | Light Brown |
| 8301 | 285-295 | 360-400 | 140-150 | Light Brown |
| 3118 | 285-295 | 390-430 | 65-75 | Light Brown |
| 1315 | 305-325 | 370-410 | 80-90 | Brown |
| 1609 | 305-325 | 400-450 | 55-65 | Brown |
| 3023 | 345-350 | 420-460 | 105-115 | Brown |
| 3019 | 345-350 | 440-480 | 65-75 | Light Brown |
| BTE | 350-360 | 480-530 | 130-140 | White |
| 3202 | 375-395 | 530-550 | 80-90 | White |
-
Glass Frit Powder is a finely milled glass material used as a base for bonding and sealing applications. It is typically customized in terms of particle size and thermal properties, allowing compatibility with various substrates such as glass, metal, and ceramics. Glass frits are often used in high-reliability applications requiring hermetic sealing or thermal expansion matching.
-
Softening Point
Coefficient of Thermal Expansion
Particle Size Distribution(D50, D90)
Chemical Composition
Color / Transparency
-
Glass Paste is a screen-printable or dispensable formulation consisting of Glass Frit Powder dispersed in an organic vehicle. It enables easy application on substrates and is suitable for precision sealing, insulating, or protective layers. Paste viscosity, solid content, and flow behavior can be tailored to the customer’s printing or dispensing process requirements.
-
Viscosity
Solid Content(%)
Thixotropy / Flow Behavior
Drying Behavior
Compatibility with Substrate
Binder Burnout Profile
-
Glass Preform is a shaped or patterned glass-based structure made from frit material, pre-sintered or thermally compressed into specific geometries. It offers excellent dimensional stability and is ideal for localized sealing or encapsulation applications. Preforms simplify assembly processes and improve consistency in high-precision electronic, optical, and sensor devices.
-
Shape & Dimensional Accuracy
Thickness & Uniformity
Preform Density / Porosity
Surface Finish
Handling Properties
Request a Sample or Custom Quote Today
All models are available in flexible quantities to support both evaluation and production.
Tell us what you need, and we’ll prepare the right material, format, and delivery terms for your application.