Patent ID: 8853802
Filing Date: 2014-10-07
Classification: B81C,H01L

Abstract:
1. A device, comprising: a substrate; a first epitaxial layer over the substrate, the first layer having a first dopant concentration in a first region of the device and a second dopant concentration in a second region of the device, the second dopant concentration being different from the first dopant concentration; a second epitaxial layer over the first epitaxial layer, the second layer having a third dopant concentration in the first region of the device and a fourth dopant concentration in the second region of the device, the third dopant concentration being closer in value to the first dopant concentration than to the second dopant concentration; a micro-electromechanical structure formed in the first region of the device, the micro-electromechanical structure including: an integrated circuit formed in the second region of the device.