摘要
Abstract
Energy storage welding is a commonly used sealing technique for metal packaging enclosures.In the electronics manufacturing industry,the common materials for packaging caps include zinc cupronickel,Kovar alloy,and stainless steel,whose surfaces are typically treated with electroless nickel plating or electroplated nickel plating.Differences in material properties of various base materials directly affect the sealing yield of energy storage welding.The effects of three base materials(zinc cupronickel,Kovar alloy,and stainless steel)on the sealing yield of energy storage welding are systematically investigated.Based on the distinct characteristics of three base materials,methods to improve the yield of energy storage welding are proposed.Experimental results show that the stainless steel base material achieves a 100％sealing yield at a welding pressure of 0.5 MPa,a voltage of 180 V,and a welding end face flatness deviation controlled within 0.1 mm,due to its ductility and hardness matching the Kovar alloy base material.The high hardness and low deformation of the iron-based Kovar alloy base material enable control of welding end face flatness deviation within 0.04 mm,resulting in a sealing yield improvement from 65.6％to 100％.For the zinc cupronickel base material,due to the low strength and poor deformation resistance,the sealing yield is increased from 76.6％to 100％by not only controlling the welding end face flatness deviation within 0.04 mm but also reducing the welding pressure by 0.1 MPa.关键词
密封工艺/储能焊接/封装基材/金属封装盖帽Key words
sealing process/energy storage welding/packaging base material/metal packaging cap分类
信息技术与安全科学
