As shown in Figure 9, variations in the relative orientation of the preferred elongation axis can result in a shift of the diffusion barriers
by two orders of magnitude at low temperatures.
The coating consisted of a system of Cr/Ni/Ag layers, where the tin layer exerted adhesive function, the nickel layer forms a diffusion barrier
and the nickel layer assures a good solderability and spreadability in a short time (Fig.
Threshold strain of the strips coated by dual layers of NiCr and titania were significantly improved, possibly by its diffusion barrier
performance to hydrogen.
Hsu; The Effect of Deposition Temperature on the Properties of TiN Diffusion Barriers
Prepared by Atomic Layer Chemical Vapor Deposition, Thin Solid Films: 485(1-2), 59-65 (2005).
Thus, it is clear that, for the best diffusion barrier
, one should use as much clay with as large an aspect ratio as possible.
On the other hand, microfissuring during film crystallization (discussed above) removes this diffusion barrier
, accelerating penetration by [Al+.
The palladium forms a diffusion barrier
between the chromium adhesion layer and the gold conductor.
In addition, poisoning of diamond growth by cobalt is inhibited with a cobalt diffusion barrier
, resulting in coatings with improved adhesion.
The copper die bumps permit use of a simplified under bump metallization (UBM) since the diffusion barrier
requirements of the UBM are no longer required.
Air pollutants must pass a boundary layer around the interface of the air and the passive sampler, a stagnant region produced by a diffusion barrier
and a boundary layer at the collector.
The new Japanese patent, number JP 3731932 B, is titled "Silicon Carbide Metal Diffusion Barrier