Abstract

This paper study the effective of the HF: ethanol diverse concentrations on the porous silicon properties which calculated using porous silicon contagious of p-type and n-type bulk silicon and using the HF acid of (39-43%) with assisted ethanol the etching time (10) min and voltage (10) volt together electro chemical etching method for bulk p-type silicon and photo electro chemical etching for bulk n-type silicon the porosity of porous silicon can be study "with" Graph metric method and study the comparison between SEM of bulk n-type and bulk p-type for produced psi .

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