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US 8,999,180 B2Granted
Process for manufacturing solar cells
AssigneeSun Chemical Corporation
InventorNigel Anthony Caiger
Life of this patent
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Abstract
A process of manufacturing a solar cell is provided. The process comprising the steps of: i) ink jet printing an alkali removable water insoluble hot melt ink jet ink onto a substrate comprising a silicon wafer to form a resist image on the substrate; ii) etching or plating the substrate in an aqueous acid medium; and iv) removing the resist image with an aqueous alkali.
Claims19
A process of manufacturing a solar cell comprising the steps of:
- i) ink jet printing an alkali removable water insoluble hot melt ink jet ink onto a substrate comprising a silicon wafer to form a resist image on the substrate, said ink having a low melt viscosity of no more than 20 mPas at a temperature range of from 50-125° C.;
- ii) etching or plating the substrate in an aqueous acid medium;
- and
- iii) removing the resist image with an aqueous alkali,
- wherein said ink comprises 50% to 99% by weight of one or more alkali soluble wax and an alkali soluble resin and wherein the ink comprises 95% by weight or more of alkali soluble components,
- wherein the one or more alkali soluble wax has an alkali washability of at least 80%, and
- wherein the ink has an alkali washability of at least 80%.
4 more elements
Dependencies are inferred from the claim text.