Sealing Glass
Sealing and solder glass powders, bonding pastes, crystallized glass and custom compositions.
Electronic Materials / Hermetic Sealing
Materials and Components for Reliable Hermetic Interfaces
HTK supports glass-to-metal, glass-to-ceramic and related hermetic sealing requirements through selected material and component partners. Projects are matched by material system, thermal expansion, process temperature, geometry and reliability target.
Sealing Product Examples
Solder glass, optical window caps and glass-to-metal components.
Product Categories
Material systems and processed components.
Optical Package Parts
Optical window and lens caps, glass LIDs, hermetic package windows and processed glass parts.
Glass-to-Metal Components
Glass-to-metal sealed components and application-specific assembled parts.
Sealing Material Families
Select the glass system around the joined materials and service environment.
Solder Glass
Lead-free and lead-containing options for optical windows, fibers, glass, ceramic and metal joining.
Kovar, Fe-Ni & Stainless
Matched or compression seals for connectors, sensors, laser and electronic packages.
Titanium, Tantalum & Aluminum
Application-specific sealing systems for batteries, capacitors, thermal and lightweight packages.
Glass-Ceramic Seals
Crystallizing glass systems for higher strength, heat resistance, pressure and chemical environments.
Glass Pastes
Screen-printable or dispensable pastes for bonding metals, ceramics, glass, quartz and chips.
Powders & Insulation
Vacuum-glass, LTCC, MLCC, flame-retardant and high-temperature insulation material families.
Preliminary Product Matching
Select the sealing family by substrate, temperature and end use.
The values below are for preliminary selection.
Swipe horizontally to view all specifications.
| Product family | Typical materials / application | Representative data | Key characteristics |
|---|---|---|---|
| Optical-window solder glass | Lens-to-metal cap; TO60, TO56, TO52, TO46, TO38, TO33, TO25, TO8, TO5 | Sealing: 430–500°C | Lead-free and lead-containing options; high reliability |
| Fiber sealing glass | Single-core, dual-core and fiber-containing configurations | Typical sealing: 330–380°C | Low-temperature joining without damaging the fiber core |
| General glass paste | Metal, ceramic and chip bonding; screen print or dispense | Powder: 3–5 µm; sintering: 320–480°C | Controlled viscosity and low-temperature bonding |
| Glass LID / optical window | Round TO caps and rectangular LIDs | Transmittance: ≥98% @ 1500–1600 nm | Hermetic optical interface; plating and dimensions by project |
| High-temperature insulation coating | Electrical insulation on metal surfaces | ≥100 MΩ at 500°C | Strong adhesion and thermal-shock resistance |
HTK can coordinate product-specific composition, CTE, particle size, hermeticity and process information.
Technical Support
HTK helps match geometry, temperature and reliability together.
Start with the application or any known conditions. Our team helps organize the remaining technical points and coordinates them with the factory.
- Material-system matching
- Process-temperature and CTE coordination
- Geometry and sealing-process review
- Hermeticity and reliability planning
- Sample and technical-document coordination
- Production and quality-point follow-up
Factory Technical Coordination
A practical bridge between technical requirements and factory execution.
HTK translates application needs into production and quality points, follows factory progress, and supports technical communication through evaluation and production.