Patent ID: 7829971

Claim:
A semiconductor apparatus comprising: an SOI substrate including an active layer, a support substrate and a buried insulation film, wherein the active layer and the support substrate are bonded to each other via the buried insulation film therebetween; a low potential reference circuit part located in the active layer and operable at a first reference potential; a high potential reference circuit part located in the active layer and operable at a second reference potential, which is greater than or equal to the first reference potential; a level-shifting element forming part located in the active layer and having a level-shifting element providing a level-shift between the first reference potential and the second reference potential; and an insulation member insulating a first portion and a second portion of the support substrate from each other, wherein the first portion corresponds in location to the low potential reference circuit part, wherein the second portion corresponds in location to the high potential reference circuit part, wherein: the low potential reference circuit part has a first region to which the first reference potential is applied; and the first portion of the support substrate is electrically connected with the first region of the low potential reference circuit part.