Patent ID: 6653714
Filing Date: 2003-11-25
Classification: H01L

Abstract:
A lateral bipolar transistor comprising:a substrate; a first insulative region formed on the substrate; a first semiconductor region of a first conductivity type selectively formed on the first insulative region; a second insulative region formed so as to substantially cover the first semiconductor region; and a second semiconductor region of a second conductivity type different from the first conductivity type, a second semiconductor region being selectively formed, wherein: the second insulative region has a first opening which reaches a surface of the first semiconductor region, and the first semiconductor region has a second opening under the first opening which reaches the underlying first insulative region, the second opening being provided in a position corresponding to the first opening of the second insulative region; the second semiconductor region entirely fills the first opening and the second opening, thereby functioning as a base region; a lower portion of the second semiconductor region which at least fills the second opening is formed by lateral growth from a face of the first semiconductor region defining a side wall of the second opening; and the first semiconductor region includes an emitter region and a collector region formed therein.