Patent ID: 9359513
Filing Date: 2016-06-07
CPC Classification: C09D,H01L

Claim Text:
1. A method of making a dopant formulation, comprising: a) combining one or more polymer vehicles selected from the group consisting of polyacrylates and polymethacrylates with one or more first solvents selected from the group consisting of alkanes, alcohols, ethers, amines, ketones and arenes to form a mixture; b) contacting said mixture with an ion exchange resin for a length of time necessary to form a low metal content mixture having a total concentration of metal ions below 100 ppb; c) removing said ion exchange resin; and d) after removing said ion exchange resin, adding one or more dopant compounds and/or dopant precursors of antimony, arsenic, phosphorous, boron, or gallium to said low metal content mixture to form said dopant formulation.