Jettable inks for solar cell and semiconductor fabrication
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United States of America Patent
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Nov 5, 2019
Grant Date -
Jul 20, 2017
app pub date -
May 19, 2015
filing date -
May 20, 2014
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Abstract
A jettable etchant composition includes 1 to 90 wt % active ingredient, and a remainder containing any combination of the following: 10 to 90 wt % solvent, 0 to 10 wt % reducing agents, <1 to 20 wt % pickling agent, 0 to 5 wt % surfactant, and 0 to 5 wt % antifoam agent. The composition can also include a soluble compound containing at least one element which when dissolved has a higher standard electrode potential than a metal to be etched or a soluble compound containing a group IA element, and a soluble platinum group metal. An ink composition can include a group VA compound or a group IIIA compound in a solvent system formulated to be jettable on a surface at a drop volume of about 5 to about 10 picoliters and to achieve a final sheet resistance of less than about 20 Ω/α of the surface upon activation.
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