Photolithography & Microchips – by Lauren Peterson


So what is photolithography and how does it relate to microchips?

Also called UV lithography and optical lithography, this process describes how light is used to transfer patterned coatings from a ‘reticle’ to a light sensitive ‘photoresist’ on a substrate. Chemical treatment engraves this exposure pattern onto the substrate (the substrate is the silicon wafers we have been talking about, in this case), beneath the photoresist. This can be done multiple times; indeed, some microchips (integrated circuits, to the electronics world) have up to fifty layers on them. The process is not so different from regular photography, before the age of digital cameras, when a pattern was created in the presence of light, except that our resist (the layer used to transfer a pattern to a substrate) is not a picture but an exceedingly precise circuit pattern.

Read the entire article in the Sept. 4th issue of the Express.


Malta Working to Change GloFo Traffic Light – By H. Wessell

MALTA, July 28 -  At the Malta Town Board July 28 agenda meeting Supervisor Paul Sausville reported that the Highway Superintendent Roger Crandall has recommended that the GlobalFoundries traffic light at the construction site on Cold Springs Road, which has been a subject of concern at its current placing, be relocated at the intersection of Cordero and Cold Springs Roads, to regulate traffic that is coming to the campus for work at 6AM. He said there have been traffic problems due to some drivers using Knapp Road as a way to get in the back door of the campus

Read the entire article in the Aug. 31st issue of the Express.