Mixed orientation semiconductor device and method

摘要

A method of making a semiconductor device begins with a semiconductor wafer that includes a first semiconductor layer overlying a second semiconductor layer. A first trench is etched in the semiconductor wafer. The first trench is filled with insulating material. A second trench is etched within the first trench and through the insulating material, such that insulating material remains along sidewalls of the first trench. The second trench exposes a portion of the second insulating layer. A semiconductor layer can then be grown within the second trench using the second semiconductor layer as a seed layer.

主权项

1. A semiconductor device comprising:
a semiconductor body having a first crystal orientation; a semiconductor layer overlying a first portion of the semiconductor body, the semiconductor layer having a second crystal orientation different than the first crystal orientation; a semiconductor region having the first crystal orientation, overlying a second portion of the semiconductor body, the second portion of the semiconductor body being laterally spaced from the first portion of the semiconductor body; a trench isolation region disposed between the semiconductor layer and the semiconductor region, the trench isolation region extending into the semiconductor body to a depth below a bottom surface of the semiconductor layer, wherein the semiconductor region extends below a bottom surface of the trench isolation region; a first semiconductor component fabricated in the semiconductor layer, the first semiconductor component comprising a first source/drain region; a second semiconductor component fabricated in the semiconductor region, the second semiconductor component comprising a second source/drain region, wherein the first source/drain region and the second source/drain region extend vertically towards the semiconductor body to substantially the same junction depth; a buried insulating layer disposed between the semiconductor layer and the semiconductor body, wherein the trench isolation region extends below a bottom surface of the buried insulating layer; and a first liner disposed between the trench isolation region and the semiconductor layer, and a second liner disposed between the trench isolation region and the semiconductor region, the first liner physically contacting the buried insulating layer and the semiconductor layer, the second liner physically contacting the semiconductor region.