Acid
Test Procedure
We prepared a molar solution of cupric acid, into which we dipped four chips of a PVD copper silicon wafer for one minute each.
Sample A was a copper chip with no treatment.
Sample B had a liquid corrosion inhibitor coated on its surface.
Sample C had a Repellix coating.
Sample D had Repellix coating and a vapor corrosion inhibitor.
Repellix Sample
The sample coated with Repellix remained untarnished after a minute submersion into acid.
Comparison
We observe in sample B that the liquid anti-corrosion layer will not survive immersion into the acid it is designed to prevent. It washes off in liquid, and the corrosion mechanism is similar to the uncoated
sample A.
In contrast, by repelling the acid from the copper surface, Repellix maintains the surface of the copper and prevents corrosion (C and D).
Integrated Surface Technologies can demonstrate Repellix coatings in its Menlo Park lab today.
To date, we have conducted demos for many customers, for a wide variety of applications.
We have also tested Repellix on a variety of devices and test structures, many of which are reported throughout the website (see the library for a master collection).
