Chip-off forensics is an acquisition procedure which involves physically removing the non-volatile integrated circuit (IC) from a device and reading it directly on an external specialized reader. It is often considered a last-option technique, as repairing the phone to a working state post-IC removal, is difficult.
This procedure only works on few models of phones that do use an EMMC chip. More recent phones such as Samsung Galaxy S6 or newer contain a UFS chip, which at the moment is not possible to read via any equipment. But as with most technology, the ability to acquire such chips is advancing on daily basis.
Chip-Off is also not possible on other types of chips that are in iPhones and iPads. This is mainly due to encryption implemented by Apple.
Data Recovery on dead Samsung Galaxy
A basic video overview can be seen in the link below. The video was shot at our lab by CBC news.