From what I've googled, the motherboards aren't assembled by hand so these lids are put to prevent the heatsink from contacting the chips. My question is what are these lids technically called? For example if I want to buy this type of lid, what do I ask for in the store? Because the glue residue on the lids is completely removed so I need to buy replacements.
The chips are huge, if I don't put the lid back, I would have to use A LOT of thermal paste to prevent heatsink contacting the chip.