Method for detecting a coating material on a substrate

Details Method for detecting a coating material on a substrate Method for detecting a coating material on a substrate

G - Physics

01

N

G01N 13/00 (2006.01) G01N 13/02 (2006.01) H05K 3/28 (2006.01)

Patent

CA 2159252

A method for detecting the presence of a coating material, particularly an organic solderability preservative, such as imidazole, on a copper substrate includes placing a test droplet on the surface of the substrate, forming an image of the droplet and measuring the contact angle between the wall of the droplet and the surface of the substrate.

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