Abstract
Silicon detectors are currently a major instrument in high-energy physical experiments. The analysis of their energy-loss data (whose deviation from the Landau-Vavilov theories has been studied recently) is performed to determine the decay point of short-lived DD particles. To use them in colliding beam machine experiments technological developments have been undertaken in order to achieve a large-scale integration for read-out chips. They can find application in calorimetry as a dense active sampling layer. The silicon sandwich calorimeters are well suited to operate near the vacuum pipes.