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

Claim 17:
18. A method of making a semiconductor device, comprising:
disposing a beam homogenizer over a semiconductor die with a beam from the beam homogenizer disposed onto the semiconductor die with an entire footprint of the semiconductor die within the beam of light, wherein a first camera is used to position the beam homogenizer over the semiconductor die;
calculating an offset of the beam homogenizer relative to the semiconductor die in a first unit while the beam homogenizer is disposed over the semiconductor die with the beam impacting the semiconductor die, wherein the offset is calculated by performing image processing on an image from a second camera, wherein the second camera has a wider field-of-view than the first camera;
using a calibration equation to convert the offset into a distance in a second unit; and
moving the beam homogenizer the distance to center the semiconductor die fully within the beam.