Glass-metal sealing beads

Private Enterprise "PROMSYSTEMS" manufactures glass to metal seal beads of different standard sizes and shapes to order. They are used for the production: sensors, tecs, power semiconductors (thyristors, diodes), feedthrought and other microelectonics. These are our standard based glasses with a coefficient of thermal expansions (Borosilicate, Soda-Lime, Titanium, etc): - 2.5-3.8 ppm/C; - 4.8-5.2 ppm/C; - 7.2-8.3 ppm/C; - 9.0-10.5 ppm/C;