Hermetic Seal
Hermetic Seals; Vacuum Tight Seal: As IJ Research is a hermetic sealing company; we routinely check the hermeticity up to in the range of 10-11 He std. cc/sec at 1 atm. diff. In order to maintain the high level of the hermeticity, IJ Research controls a thermo-mechanical and/or thermo-chemical behavior of the materials during the processing of GTM sealing, CTM sealing or any other processing. When/if a sealing material has to go through its microstructural phase change, IJ Research certainly controls its nucleation and crystallization parameters as may be required so that the final seal would attain a proper ratio of vitreous and devitrified phases in the sealing system and also obtain a desirable level of thermal expansion of the sealing material that closely match to its sealing components.

When/if a particular sealing material has to go through its optimized oxidation/reduction process, IJ Research certainly controls all the parameters of the processes so that the final seal would attain its maximum interfacial adhesion strength. The adhesion strength IJ Research provides is usually far greater than customers’ actual requirements and this is one of the reasons why IJ Research products hardly rejected by customers.

As we have been demonstrated in many projects of next to impossible combinations of the materials and processes since 1988, we shall be able to take care of your needs of seals, bonds or joints for virtually any/all applications. One example of our specialties is a hermetic seal of 300 series SST to Corning 7740 (Pyrex) for a an application temperature range from -300OC to +300OC. This is just one of the challenging job examples that we have been successfully demonstrated over the years.

Sapphire to metal seal is one of the well-established processes at IJ Research and the current application fields include medical, oil/gas and defense industries.

In-house plating capability supports this hermetic sealing process and its salt fog spray test requirement. In-house laser welding capability also supports this hermetic sealing process of similar and dissimilar material joining as shown in the section of Ceramic to Metals and Glass to Metal Seals.

Virtually all the parts IJ Research manufactures are hermetic and its applications are endless from missile guidance, thermal imaging, radar, satellite, catalytic converter, radiator, detonator, pressure transducer, etc.

Please click for a PDF copy of the brochures, Hermetic Seal, Metallization, Ceramic to Metal Seal, Sealing Glass List.