Silver lines electrode patterned by transfer printing

This paper reports a novel method for the fabrication of silver electrode with high resolution using transfer printing method. The resolution can reach to 30 μm with high electrical conductivity as we keep a large depth and micro-size particles of the silver. In the study, we prepare the mixture binder for silver paste to improve the property of transferring. The parameters of the transfer process, including paste properties, pressure and surface energy, are also studied. Silver fingers of 50 μm width and 20 μm depth has been successfully fabricated on polysilicon and fired at 600 °C in Tube Furnace. The electrical conductivity after firing test is larger than 104 S/cm. In this study, room temperature through the whole process and low pressure during the transferring will keep a low cost.

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► We develop a transfer printing process to fabricate micro silver fingers.
► Silver lines can be used as electrodes as the electrical conductivity is larger than 104 S/cm after firing test.
► We prepare the mixture binder of the paste to improve the property of transferring.
► Silicone rubber as the transfer layer.
► UV aided transfer printing is developed.