The most common backing plate material is oxygen-free copper. This readily available metal has good electrical and thermal characteristics while also being easy to machine. Copper backing plates can be re-used, with care, twenty times or more.
For applications where copper is not appropriate, molybdenum may be substituted. For some materials, such as ceramics, or even metals made via powder metallurgy, the coefficient of expansion for copper is mismatched. For applications where a high temperature bond is required, copper may also oxidize badly or warp.
Reusing a Backing Plate
Most backing plates are reusable. If correct bonding agents are used, such as pure Indium, the process of recycling is relatively simple. Backing plates attached with epoxies typically have to be ground or machined back to a usable state
When we receive your old backing plate, we will de-bond the old target (if applicable) and do a complete inspection for flatness and seal surfaces. If any repairs are required you will be notified and provided with a quotation for the repair and updated shipping commitment (if applicable) for the finished target assembly.
Sizes and Shapes
We can easily bond most targets, in any size or geometry.
Copper and Stainless Steel Cups
We specialize in the use of this unique backing plate geometry for delicate ceramic targets ranging in size from 0.5” to 8”. The cup design provides good mechanical support for the brittle target on the back and around the edge. This improves both heat transfer to the cooling well of the cathode and increased mechanical integrity by providing a clamping point for the assembly which does not stress the target.