Cross section of IC looking down the length between the pins. There is a void above the IC die, with a glued on lid above it. The pins point upwards. You can see the bolt, the metal slug or metal paste and the indent where the die sits.
https://files.mastodon.social/media_attachments/files/112/247/276/066/530/608/original/a66188139aad2c1c.jpg