Users already have access to a large number of shielding materials. Starting with conventional spring contact strips made of -beryllium, plastics containing conductive or other conductive particles, to plastics or elastomers which are simply covered with a wire mesh. The shielding effectiveness, compression force, mechanical and climatic conditions and, finally, their compatibility are all factors which must be given due consideration when selecting suitable products.
Durometer is one of several measures of the of a material. The durometer scale was defined by Albert F. Shore. Durometer is typically used as a measure of hardness in polymers, elastomers and rubbers. Durometer measures the depth of an indentation in the material created by a given force on a standardized presser foot.
The components are mounted or placed directly onto the surface of PCBs. An electronic device so made is called a surface-mount device ( ). In the industry it has largely replaced the through-hole technology construction method of fitting components with wire leads into holes in the circuit board. surface-mounted device.
is alloyed or non-alloyed steel with a particularly high level of purity. Stainless steel contains at least 10.5% chrome. Stainless steel provides better resistance due to its having a passive layer which forms a barrier between the alloy and the surrounding materials. If this passive layer is damaged, it will repair itself automatically under the influence of oxygen.