Glass-to-Metal Seal
Concept
- This package comprising metal and glass has a characteristic of high air tightness and excellent electrical features.
- This package has stable output and service life by using radiating features inherent in metal.
- This package is optimal for the system requiring high reliability such as semi-conductor laser or vehicle-mounted sensor
- Recently widely used for optical communication(High Frequency) and industrial purpose.
Structure
- ‘Matched Type’ and ‘Compression Type’ depending on difference of glass attachment method are available.
Matched Type
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No. Parts Material 1 Eyelet Kovar 2,3 Lead Kovar 4 Glass Rigid Glass
Compression Type
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No. Parts Material 1 Eyelet Soft steel 2,3 Lead Alloy 4 Glass Soda Barium Base
Soft Glass 
CAP
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No. Material quality 1 Kovar/Alloy/SUS430FSM 2 Glass(Hard/Flat/Ball) ※ Manufacturing with diversified specification depending on the requirements of the customer including No glass cap, Glass cap is allowed.
Performance
- High air tightness
- Matched Type: Below 1x10-10 Pa m2/sec
- Compression type: Below 1x10-9 Pa m2/sec - High features of electrical insulation
- Over 1x1010 Ω (D.C 100V, R.T., 40±5% R.H) - Wire Bonding features (gold wire, Al wire)
- Soldering features
- High temperature resistance
- durability, physical fatigue resistance
Usage
- Transceiver for optical communication (VCSEL, TOSA, ROSA, FP, DFB, etc.)
- Various sensors including optical sensor, vehicle sensor, Gas pressurizing sensor
- PD(PhotoDiode), LED for optical module
- Barcode scanner, Laser Printer for various industrial applications
- Other Transistor, IC purpose
