Biomedical and many sensor optical component packages are relatively small and therefore the adjacent glass or sapphire window to metal seal can be damaged from the welding due to a short distance between the welding and the window seal lines. The 2 mm penetration weld depth is considered as the maximum safe depth and yet, we will need to be careful not to damage the seal line. IJ Research utilizes the best available material combinations to minimize the damage understanding the materials property of thermal diffusivity, melting point, boiling point, etc.

Electrical resistance welding (ERW)
This forged welding provides a secured metallurgical joining by pressurizing and melting the two mating materials together. The optimum welding is slightly less than their melting temperatures. Common names are spot welding, seam welding and projection welding. High electrically and thermally conductive Cu alloy electrodes are common as a welding electrode. They pass an electrical current through the work piece and the lower electrically conductive work pieces are welded. In this process, a heat will be generated by the following formula:

Q = I² · R · t

where Q is the heat energy, I is the current, R is the electrical resistance and t is the time that the current is applied. In order to retain the heat at work pieces and prevent heating the electrode, some of the electrode is water cooled. Our highly experienced engineers will take care of all the necessary issues of your particular materials in terms of thermal conductivity, electrical resistance, etc. for a successful joining or nugget weldment.