The package is usually made of low-cost 10# steel material, and it can also be made of kovar alloy materials under special requirements. This type of packaging package products use a stable and reliable pressure type glass melt sealing process. Supporting step etched cover plate meets the requirements of parallel seam welding, and the cover plate can be customized according to user needs. The illustrated sample shows a pitch of 1.27mm and a number of 104.