Types of Ceramic:Aluminum Nitride AlN
Flatness of chip mounting area:≤ 2 um
Roughness of chip mounting area:≤ 0.3 um
bottom:CS1010
lead:oxgyen free copper
lead 2:copper cored alloy
Cover plate:4J42(42alloy)
Inner cover plate:Al 2A12
Welding frame:HLAgCu28