Sometimes we find the photolithography isn’t that successful. The reason might be the exposure. Normally the UV intensity of the EVG 620 Aligner is 12 mW/cm2. However, it varies overusing.
Therefore, it’s necessary to know the current UV intensity.
This post shows how to measure the UV intensity instructed by Bill.
1.”UNIF” Icon
2.assemble the chuck for measuring UV intensity
3.set up the UV meter
4.”continue”
5.Aligner works at the mode of UV measuring. So, the UV meter reads the intensity of the UV light of the EVG 620 aligner.
6.Put back the UV meter to its box.
7.the UV meter should be put below the MJB4 aligner.
