The package is usually made of kovar alloy material, but it can also use 10 # steel and other materials. Packaging package products adopt a stable and reliable matching type of glass melt sealing process. Supporting step etched cover plate meets the requirements of parallel seam welding, and the cover plate can be customized and strengthened according to user needs. The illustrated sample shows the combination of 3.81mm pitch diameter 1.2mm lead and 2.54mm pitch 0.7mm lead.