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US 5,176,744 AGranted
Solution for direct copper writing
AssigneeMicroelectronics and Computer Technology Corporation
InventorHeinrich G. O. Muller
Life of this patent
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Abstract
Improved method and solutions for copper direct writing, particularly laser-induced direct writing, involving copper formate precursor solutions that contain a crystallization-inhibiting agent. The agent is selected from glycerol, citric acid, malic acid, malonic acid and glycine.
Claims6
A precursor solution for laser-induced copper writing consisting essentially of:
- water;
- copper formate;
- and
- at least 5% by weight of a crystallization-inhibiting compound selected from the group consisting of glycerol, citric acid, malic acid, malonic acid, glycine or combinations thereof.
1 more element
Dependencies are inferred from the claim text.