The lens attached to the OV5647 was removed as it was not needed. The image sensor housing was still in the way and could not be installed in the focal position, so the shell was split.
Since the image sensor shell is welded (probably vibration-welded) to the bottom section, it is necessary to split the welds. The four corners of the shell joint were cut with a nipper blade to break the weld.
There was no damage to the sensor that we were worried about.
Since I had a chance to observe the sensor, I took pictures of it under a microscope.
Unfortunately, the magnification was not enough to see the pattern of the sensor.