My old data book collection

dl324

Joined Mar 30, 2015
14,318
That certainly looks metallic, but I think they'd choose materials that had similar contraction/expansion properties so the hermetic seal wouldn't be damaged from temperature cycling.

TI (National Semiconductor) only discuss 3 package types with hermetic seals: ceramic with a lid that's soldered on, ceramic top and bottom, and metal cans.
1638509723922.png
 

Gwyddion

Joined Dec 2, 2021
5
That certainly looks metallic, but I think they'd choose materials that had similar contraction/expansion properties so the hermetic seal wouldn't be damaged from temperature cycling.

TI (National Semiconductor) only discuss 3 package types with hermetic seals: ceramic with a lid that's soldered on, ceramic top and bottom, and metal cans.
View attachment 254120
Yes, its actually a sandwich with what looks like aluminium top and bottom and white ceramic in-between - I've not seen this before
 
Top