Five Star Technologies announced last week that it has introduced the ElectroSperse™ line of silver conductor pastes, initially targeting applications in displays and solar cells. Five Star says the ElectroSperse pastes deliver the same uniform particle size and consistent rheology seen in Five Star dispersions, enabling customers to print fine features consistently and economically. Initial screen printing trials have demonstrated that line widths as narrow as 3 mils can be printed consistently with no loss of conductivity or line integrity.
The initial ElectroSperse offerings, D-110, D-112 and D-114, are targeted at display bus bar electrodes. All three products are screen-printable pastes designed to deliver excellent adhesion when fired onto ITO (Indium Tin Oxide) or F-doped TO (Fluorine-doped Tin Oxide)-coated glass. The series is entirely lead-free, responding to the European market requirements for RoHS (Restriction of Hazardous Substances) and REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) compliance. The three grades differ in metal content, allowing the user to select a conductivity and price range suitable to the application. ElectroSperse D-114 achieves a sheet resistivity of 1.2-1.8 milli-ohm/sq, while D-112 and D-114 are targeted at 2-3 and 4-5 milli-ohms/sq, respectively. Applications include touch screen sensor electrodes, heater circuits and antennae.
Five Star Technologies also announced at the same time that it has introduced ElectroSperse™ X-120, X-122 and X-126, silver-based conductor pastes designed for firing at temperatures as low as 380ºC. The new pastes demonstrate excellent adhesion to ITO (Indium Tin Oxide) or F-doped TO (Fluorine-doped Tin Oxide)-coated glass when fired at 380º-500ºC. All three products maintain excellent conductivity, even at the low end of the firing profile, achieving sheet resistivity of 2-3 milli-ohms/sq. This exceptional combination of lower firing temperatures and high conductivity should enable use in electrode applications where other components could be damaged by higher fire profiles. Such potential applications include ceramic components, display electrodes, heater circuits and antennae.
Like all pastes in the ElectroSperse line, the X-120 series products contain a highly uniform dispersion of silver with a tightly controlled particle size distribution in the low to sub-micron range. This enables customers to print fine features with much greater precision and consistency than conventional pastes. X-126 rheology is tailored for syringe dispensing via extrusion, while X-120 and X-122 are intended for screen printing applications.
Five Star also offers a line of specialty dispersions that deliver enhanced stability and unparalleled performance for precious metal processing, chip packaging, ceramic components and thick film pastes.
For further information, contact Five Star at 1-440-239-7005 or sales@fivestartech.com.
About Five Star Technologies
Five Star Technologies is a supplier of high-performance powders and dispersions for use in semiconductor and microelectronic packaging, display and ceramic component applications. Using its patented Particle Management Technology, Five Star creates precision dispersions of a wide range of materials (metals, oxides, nitrides, carbon fibers, etc.) in various organic media. Their products exhibit unparalleled rheological stability and exceptional particle size control, enabling our customers to produce materials with next-generation performance profiles. For more information, please visit Five Star Technologies website at www.fivestartech.com 
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