Patent ID: 9577034
Date: 2017-02-21
CPC Classifications: C23C,C23F,C30B,H01L

Claim:
1. An apparatus comprising: a layer forming apparatus configured to form semiconductor layers; an n-dopant source to supply an n-dopant to the layer forming apparatus; a p-dopant source to supply a p-dopant to the layer forming apparatus; a controller configured to control an amount of n-doping and an amount of p-doping; and a dopant concentration measurement device; wherein the controller is configured to control the n-dopant source, the p-dopant source and the layer forming apparatus to form an n/p-codoped calibration layer, wherein the dopant concentration measurement device is configured to measure a net dopant concentration of the calibration layer, and wherein the controller is configured to adjust an amount of n-dopant relative to an amount of p-dopant based on the net dopant concentration.