Patent ID: 8662008

Claim:
An edge coating apparatus for solar cell substances, the apparatus comprising: a rotatable substrate support comprising: a cam that is located under a chuck, the cam being mechanically coupled to be rotated with a non-circular solar cell substrate and having a shape of the substrate; and the chuck configured to hold the substrate; and an applicator comprising: a feed tube adapted to contain a coating material; a circular roller comprising: a groove adapted to receive the coating material from the feed tube at a first location adjacent to the feed tube, the groove configured to surround a perimeter edge of the substrate at a second location spaced apart from the first location and dispense the coating material along the perimeter edge of the substrate at the second location while the substrate and roller are rotated, wherein the groove does not contact the perimeter edge of the substrate; and a follower concentric with and supporting the circular roller, the follower contacting the cam and positioning the applicator a coating distance away from the perimeter edge of the substrate so as not to physically contact the perimeter edge of the substrate while applying the coating material to the perimeter edge of the substrate.