Patent ID: 8691675
Filing Date: 2014-04-08
Classification: H01L

Abstract:
1. A process of doping a silicon layer with dopant atoms, comprising: reacting a vapor of a single dopant precursor of phosphorous oxychloride with oxide and/or hydroxide reactive sites present on the silicon layer to form a self assembled monolayer of dichlorophosphonate, wherein the single dopant precursor is the only precursor reacted with the oxide and/or hydroxide reactive sites present on the silicon layer and deposited onto the silicon layer; hydrolyzing the self assembled monolayer of the dichlorophosphonate with water vapor to form phosphinic acid; capping the self assembled monolayer of the single dopant precursor with the phosphinic acid with an oxide layer, wherein the oxide layer is selected from the group consisting of aluminum oxide, tetralkoxyhafnium, and tetralkoxytitanium; and annealing the silicon layer at a temperature effective to diffuse dopant atoms from the dopant precursor into the silicon layer.