Patent ID: 11929334
Assignee: STATS CHIPPAC PTE. LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 4:
5. A method of making a semiconductor device, comprising:
disposing a semiconductor die over a substrate;
disposing a beam homogenizer over the semiconductor die using a first camera, wherein a beam from the beam homogenizer impacts the semiconductor die;
calculating a positional offset of the beam relative to the semiconductor die in a first unit using image processing on an image from a second camera, wherein the second camera is a different type of camera from the first camera;
using a first calibration equation to convert the positional offset into a first distance in a second unit;
moving the beam homogenizer the first distance to center the semiconductor die fully within the beam;
calculating a rotational offset of the beam relative to the semiconductor die in a third unit;
using a second calibration equation to convert the rotational offset into a second distance in a fourth unit; and
rotating the beam homogenizer the second distance to rotationally align the beam to the semiconductor die.