INNOVACERA | technical ceramic solutions

A cold cathode gauge can run reliably for a long time and then start behaving differently. It may take longer than usual to ignite, the reading may become unstable, or the gauge may stop igniting altogether.   There are several possible reasons for these problems. One of the first things worth checking is contamination inside the gauge.   This is particularly relevant on vacuum equipment where the gauge is exposed to process gases, coating materials, dust, or particles. Over time, deposits can build up on the internal parts and interfere with the discharge used for pressure measurement.   That does not always mean the complete gauge needs to be replaced. If the problem is related to deposits on the anode, cleaning may be worth trying first. If the anode is badly contaminated, corroded, or physically damaged, replacement may make more sense.   1. How Can Contamination Affect Gauge Ignition?   A cold cathode gauge needs an electrical discharge to operate. The elec...

INNOVACERA supplies ground, lapped and polished aluminum nitride (AlN) substrates for thin-film circuits, laser diode submounts, photonics and precision metallization. Thermal conductivity we provided is 170, 200 and 230 W/m·K, with master sizes up to 138 × 190 mm. For applications requiring a fine surface, precision polishing is available down to Ra ≤ 0.05 μm, with custom sizes, thickness,and slots available. AlN substrate surface finish can be selected according to the downstream process. INNOVACERA provides grinding, fine lapping, polishing and precision polishing, together with custom thicknesses, dimensions and machining features for different application requirements. Product Specification Specification Capability Material Aluminum nitride (AlN) Thermal conductivity 170 / 200 / 230 W/m·K Thickness 0.38 / 0.55 / 0.635 mm standard, others on request Thickness tolerance ±0.05 mm typical Common sizes 50.8 × 50.8, 100 × 100, 114.3 × 114.3, 120 × 120 mm, customized size is available. L...

  Aluminum nitride (AlN) ceramics undergo multiple thermal processing steps from raw powder synthesis to high-temperature sintering. These processes rely heavily on the internal furniture and fixtures of high-temperature vacuum or atmosphere furnaces. Depending on workpiece geometry and thermal cycles, different ceramic structures—including crucibles, setter plates, support blocks, and electrical insulators—are required inside the hot zone.   Boron nitride (BN) exhibits exceptional thermal shock resistance, excellent electrical insulation, high sublimation temperatures, and a very low coefficient of thermal expansion (CTE). Crucially, BN does not wet or easily react with most molten materials and nitride green bodies. However, each furnace component serves a distinct mechanical and thermal role: crucibles hold loose materials, setter plates provide planar support for flat substrates, fixtures maintain multi-layer stacking, and insulators isolate high-voltage heating circuits....