Nondestructive in-line monitoring method for diffusion process control in InP

Autor: Vlad Temchenko, Kevin Hewitt, Kim Kirkwood, Yahong Y.H. Qian, Chris Pawlowicz, Andrew Woodard, Christina Elliott, Tedeusz Bryskiewicz
Rok vydání: 2003
Předmět:
Zdroj: Applications of Photonic Technology 6.
ISSN: 0277-786X
DOI: 10.1117/12.543541
Popis: We report a non-destructive in-line monitoring method developed for Cd diffusion into InP on SACM-APD structure. Photocurrent vs voltage measurement are taken directly via proving diffused diodes on a wafer. We demonstrate that there is linear correlation between punch-through voltages Vpt on the photo I-V curves and diffusion depth measured by SIMS and Polaron profiles. It has been established that Vpt can be extracted easily from I-V curves and used for re-diffusion to approach target depth.
Databáze: OpenAIRE