Ishidi lensimbi ye-silicon, elaziwa nangokuthi insimbi ye-silicon kagesi, lenziwe ngensimbi kagesi njengento eluhlaza eyinhloko futhi ingxenye ethile ye-silicon yengezwa. Umsebenzi wayo oyinhloko ukunciphisa ukulahlekelwa kazibuthe kanye nokulahlekelwa kwensimbi kwezinto zikagesi ezifana namamotho, ama-transformer, amajeneretha, kanye nokwenza ngcono ukusebenza kahle nokonga amandla kwemishini kagesi. Izakhiwo kazibuthe zeshidi lensimbi ye-silicon zihluke kakhulu kulezo zensimbi kagesi, ezinokufinyelela kukazibuthe okuphezulu namandla aphansi kazibuthe, okwenza ukuguqulwa kwamandla kagesi kusebenze kahle.