As mentioned, die chips, but inside the closed devices when a part breaks off, these are broken post issues. The post forms in the inside of the closed devices. There is a post that forms the center of these devices. When it breaks off, it can be total/below the fields/part way up on the post. The differences? If part broken post, will have a close to normal opening of the closed devices.

But if it breaks off it can fill the closed devices.

If it breaks below the fields, the void on the die will be so deep that the void will make a raised area taller than the device.

Note how the broken post below the field creates this rise above these posts?
So you have part of the die break off and form a chip, or you can have a broken post and part/full/over the top of the devices can be affected. That is the differences.
CoopHome:
[red]What is the difference between a die chip and a broken die post?[/red[ posts create the inside of closed devices. Chips are just part of the die that breaks away from the die.